Related
I'm currently trying to add more than one mathematical function curves. Below is part of my code.
// draw all expression curves (in viewDidLoad)
for ( j=0; j<self.expNum; j++ ) {
[self getDataForPlot1:self.plotIndex]; // get DataForPlot of one selected expression
[self addCurve:self.plotIndex];
}
I'm trying to add all curves after drawing the axes, but it is only the last input curve that is drawn. How can I separate the dataForPlot for each function?
-(void)getDataForPlot1:(int)index
{
int i;
NSString *exp;
int bound, plotNum;
double interval;
bound = 3 * scaleX;
plotNum = 3 * 60;
interval = (double)bound / plotNum;
NSMutableArray *contentArray = [NSMutableArray arrayWithCapacity:2*plotNum];
for ( i = -plotNum; i < plotNum; i++ ) {
id x;
x = [NSNumber numberWithFloat: i * interval];
// get one expression
.......
id y = [exp numberByEvaluatingString]; // get y values from the expression
[contentArray addObject:[NSMutableDictionary dictionaryWithObjectsAndKeys:x, #"x", y, #"y", nil]];
}
dataForPlot = contentArray;
}
-(void)addCurve:(int)index {
CPTScatterPlot *boundLinePlot = [[CPTScatterPlot alloc] init];
CPTMutableLineStyle *lineStyle = [CPTMutableLineStyle lineStyle];
lineStyle.miterLimit = 1.0f;
lineStyle.lineWidth = 3.0f;
lineStyle.lineColor = [CPTColor blueColor];
boundLinePlot.dataLineStyle = lineStyle;
boundLinePlot.identifier = #"Blue Plot";
boundLinePlot.dataSource = self;
[graph addPlot:boundLinePlot toPlotSpace:plotSpace];
boundLinePlot.interpolation = CPTScatterPlotInterpolationCurved;
}
(Answering the question based on comments above)
Save a copy of each dataset separately. It looks like the calculated plot data gets overwritten each time you call -getDataForPlot1:.
Also, set a unique identifier for each plot so the datasource can know which one is requesting data.
Is it possible to set the contents of a CALayer to an animated GIF and have it display that animation? I know that I can set the contents to an image like so:
CALayer* subLayer = [CALayer layer];
NSImage *image = [[NSImage alloc] initWithData:data];
subLayer.contents = image;
And the image will show, but if it's animated, the animation will not display. Is the only solution to get the individual frames for the GIF, get the frame rate, then change the content of the sublayer according to the frame rate? Or is there a much simpler method that I'm overlooking?
Swift 3 version, but changed to receive URL (for my own purpose).
func createGIFAnimation(url:URL) -> CAKeyframeAnimation?{
guard let src = CGImageSourceCreateWithURL(url as CFURL, nil) else { return nil }
let frameCount = CGImageSourceGetCount(src)
// Total loop time
var time : Float = 0
// Arrays
var framesArray = [AnyObject]()
var tempTimesArray = [NSNumber]()
// Loop
for i in 0..<frameCount {
// Frame default duration
var frameDuration : Float = 0.1;
let cfFrameProperties = CGImageSourceCopyPropertiesAtIndex(src, i, nil)
guard let framePrpoerties = cfFrameProperties as? [String:AnyObject] else {return nil}
guard let gifProperties = framePrpoerties[kCGImagePropertyGIFDictionary as String] as? [String:AnyObject]
else { return nil }
// Use kCGImagePropertyGIFUnclampedDelayTime or kCGImagePropertyGIFDelayTime
if let delayTimeUnclampedProp = gifProperties[kCGImagePropertyGIFUnclampedDelayTime as String] as? NSNumber {
frameDuration = delayTimeUnclampedProp.floatValue
}
else{
if let delayTimeProp = gifProperties[kCGImagePropertyGIFDelayTime as String] as? NSNumber {
frameDuration = delayTimeProp.floatValue
}
}
// Make sure its not too small
if frameDuration < 0.011 {
frameDuration = 0.100;
}
// Add frame to array of frames
if let frame = CGImageSourceCreateImageAtIndex(src, i, nil) {
tempTimesArray.append(NSNumber(value: frameDuration))
framesArray.append(frame)
}
// Compile total loop time
time = time + frameDuration
}
var timesArray = [NSNumber]()
var base : Float = 0
for duration in tempTimesArray {
timesArray.append(NSNumber(value: base))
base.add( duration.floatValue / time )
}
// From documentation of 'CAKeyframeAnimation':
// the first value in the array must be 0.0 and the last value must be 1.0.
// The array should have one more entry than appears in the values array.
// For example, if there are two values, there should be three key times.
timesArray.append(NSNumber(value: 1.0))
// Create animation
let animation = CAKeyframeAnimation(keyPath: "contents")
animation.beginTime = AVCoreAnimationBeginTimeAtZero
animation.duration = CFTimeInterval(time)
animation.repeatCount = Float.greatestFiniteMagnitude;
animation.isRemovedOnCompletion = false
animation.fillMode = kCAFillModeForwards
animation.values = framesArray
animation.keyTimes = timesArray
//animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
animation.calculationMode = kCAAnimationDiscrete
return animation;
}
Important thing is written in the documentation of 'CAKeyframeAnimation':
the first value in the array must be 0.0 and the last value must be 1.0.
The array should have one more entry than appears in the values array.
For example, if there are two values, there should be three key times.
So added this line:
timesArray.append(NSNumber(value: 1.0))
And also checked in exporting as video with AVAssetExportSession.
Please call like this:
if let url = Bundle.main.url(forResource: "animation", withExtension: "gif"){
let animation = createGIFAnimation(url: url)
}
Well, okay, I guess this isn't that hard to do. Basically I check to see if the image is a GIF:
if ([format isEqualToString:#"gif"]){
CAKeyframeAnimation *animation = [self createGIFAnimation:data];
[subLayer addAnimation:animation forKey:#"contents"];
}
And as you can see, I'm calling my custom createGIFAnimation method, which looks like this:
- (CAKeyframeAnimation *)createGIFAnimation:(NSData *)data{
NSBitmapImageRep *rep = [[NSBitmapImageRep alloc] initWithData:data];
CGImageSourceRef src = CGImageSourceCreateWithData((__bridge CFDataRef)(data), nil);
NSNumber *frameCount = [rep valueForProperty:#"NSImageFrameCount"];
// Total loop time
float time = 0;
// Arrays
NSMutableArray *framesArray = [NSMutableArray array];
NSMutableArray *tempTimesArray = [NSMutableArray array];
// Loop
for (int i = 0; i < frameCount.intValue; i++){
// Frame default duration
float frameDuration = 0.1f;
// Frame duration
CFDictionaryRef cfFrameProperties = CGImageSourceCopyPropertiesAtIndex(src,i,nil);
NSDictionary *frameProperties = (__bridge NSDictionary*)cfFrameProperties;
NSDictionary *gifProperties = frameProperties[(NSString*)kCGImagePropertyGIFDictionary];
// Use kCGImagePropertyGIFUnclampedDelayTime or kCGImagePropertyGIFDelayTime
NSNumber *delayTimeUnclampedProp = gifProperties[(NSString*)kCGImagePropertyGIFUnclampedDelayTime];
if(delayTimeUnclampedProp) {
frameDuration = [delayTimeUnclampedProp floatValue];
} else {
NSNumber *delayTimeProp = gifProperties[(NSString*)kCGImagePropertyGIFDelayTime];
if(delayTimeProp) {
frameDuration = [delayTimeProp floatValue];
}
}
// Make sure its not too small
if (frameDuration < 0.011f){
frameDuration = 0.100f;
}
[tempTimesArray addObject:[NSNumber numberWithFloat:frameDuration]];
// Release
CFRelease(cfFrameProperties);
// Add frame to array of frames
CGImageRef frame = CGImageSourceCreateImageAtIndex(src, i, nil);
[framesArray addObject:(__bridge id)(frame)];
// Compile total loop time
time = time + frameDuration;
}
NSMutableArray *timesArray = [NSMutableArray array];
float base = 0;
for (NSNumber* duration in tempTimesArray){
//duration = [NSNumber numberWithFloat:(duration.floatValue/time) + base];
base = base + (duration.floatValue/time);
[timesArray addObject:[NSNumber numberWithFloat:base]];
}
// Create animation
CAKeyframeAnimation* animation = [CAKeyframeAnimation animationWithKeyPath:#"contents"];
animation.duration = time;
animation.repeatCount = HUGE_VALF;
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
animation.values = framesArray;
animation.keyTimes = timesArray;
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
animation.calculationMode = kCAAnimationDiscrete;
return animation;
}
Pretty straightforward, although I would love some tips on how to improve it.
- (CAKeyframeAnimation *)createGIFAnimation:(NSData *)data{
CGImageSourceRef src = CGImageSourceCreateWithData((__bridge CFDataRef)(data), nil);
int frameCount =(int) CGImageSourceGetCount(src);
// Total loop time
float time = 0;
// Arrays
NSMutableArray *framesArray = [NSMutableArray array];
NSMutableArray *tempTimesArray = [NSMutableArray array];
// Loop
for (int i = 0; i < frameCount; i++){
// Frame default duration
float frameDuration = 0.1f;
// Frame duration
CFDictionaryRef cfFrameProperties = CGImageSourceCopyPropertiesAtIndex(src,i,nil);
NSDictionary *frameProperties = (__bridge NSDictionary*)cfFrameProperties;
NSDictionary *gifProperties = frameProperties[(NSString*)kCGImagePropertyGIFDictionary];
// Use kCGImagePropertyGIFUnclampedDelayTime or kCGImagePropertyGIFDelayTime
NSNumber *delayTimeUnclampedProp = gifProperties[(NSString*)kCGImagePropertyGIFUnclampedDelayTime];
if(delayTimeUnclampedProp) {
frameDuration = [delayTimeUnclampedProp floatValue];
} else {
NSNumber *delayTimeProp = gifProperties[(NSString*)kCGImagePropertyGIFDelayTime];
if(delayTimeProp) {
frameDuration = [delayTimeProp floatValue];
}
}
// Make sure its not too small
if (frameDuration < 0.011f){
frameDuration = 0.100f;
}
[tempTimesArray addObject:[NSNumber numberWithFloat:frameDuration]];
// Release
CFRelease(cfFrameProperties);
// Add frame to array of frames
CGImageRef frame = CGImageSourceCreateImageAtIndex(src, i, nil);
[framesArray addObject:(__bridge id)(frame)];
// Compile total loop time
time = time + frameDuration;
}
NSMutableArray *timesArray = [NSMutableArray array];
float base = 0;
for (NSNumber* duration in tempTimesArray){
//duration = [NSNumber numberWithFloat:(duration.floatValue/time) + base];
base = base + (duration.floatValue/time);
[timesArray addObject:[NSNumber numberWithFloat:base]];
}
// Create animation
CAKeyframeAnimation* animation = [CAKeyframeAnimation animationWithKeyPath:#"contents"];
animation.duration = time;
animation.repeatCount = HUGE_VALF;
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
animation.values = framesArray;
animation.keyTimes = timesArray;
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
animation.calculationMode = kCAAnimationDiscrete;
return animation;
}
according to mahal its should be done
I'm trying to create a gradient color out of an array of dictionary (colorArray2). This dictionary contains 5 keys: r, g, b, a, p. r, g, b, a are component values (strings), p being the location. I'm trying to create a gradient color with initWithColors:atLocations:colorSpace. For now, I have the following.
NSGradient *aGradient;
NSColorSpace *space = [NSColorSpace genericRGBColorSpace];
NSMutableArray *cArray = [[NSMutableArray alloc] initWithObjects:nil]; // storing colors
NSMutableArray *pArray = [[NSMutableArray alloc] initWithObjects:nil]; // storing locations
for (NSInteger i2 = 0; i2 < colorArray2.count; i2++) {
NSString *r = [[colorArray2 objectAtIndex:i2] objectForKey:key2a];
NSString *g = [[colorArray2 objectAtIndex:i2] objectForKey:key2b];
NSString *b = [[colorArray2 objectAtIndex:i2] objectForKey:key2c];
NSString *a = [[colorArray2 objectAtIndex:i2] objectForKey:key2d];
NSString *p = [[colorArray2 objectAtIndex:i2] objectForKey:key2e];
NSColor *color = [NSColor colorWithSRGBRed:[r integerValue]/255.0f green:[g integerValue]/255.0f blue:[b integerValue]/255.0f alpha:[a integerValue]/100.0f];
[cArray addObject:color];
[pArray addObject:[NSNumber numberWithDouble:[p doubleValue]]];
}
So I have an array (cArray) containing colors. What I don't know is how to create an array of locations. According to the documentation, locations is an array of CGFloat values containing the location for each color in the gradient. How do I enumerate whatever to create a float array?
Thank you for your help.
Update
More specifically, how do I make pArray to get something like
double d[] = {0.1, 0.2, 0.3, 0.5, 1.0};
so that I can have
aGradient = [[NSGradient alloc] initWithColors:cArray atLocations:d colorSpace:space];
NSGradient's documentation states that locations parameter should be of type const CGFloat*, so you can't use NSArray*. The following should work:
// Allocate a C-array with the same length of colorArray2
CGFloat* pArray = (CGFloat*)malloc(colorArray2.count * sizeof(CGFloat));
for (NSInteger i2 = 0; i2 < colorArray2.count; i2++) {
// Extract location
NSString* p = [[colorArray2 objectAtIndex:i2] objectForKey:key2e];
pArray[i2] = [p doubleValue];
}
// Do whaterver with pArray
...
// Remember to free it
free(pArray);
You can use:
NSArray *colors = #[[NSColor colorWithWhite:.3 alpha:1.0],
[NSColor colorWithWhite:.6 alpha:1.0],
[NSColor colorWithWhite:.3 alpha:1.0]];
CGFloat locations[3] = {0.0, 0.5, 1.0};
NSGradient *gradient = [[NSGradient alloc] initWithColors:colors atLocations:locations colorSpace:[NSColorSpace genericRGBColorSpace]];
[gradient drawInRect:CGRectMake(100.0, 7.0, 10.0, 18.0) angle:-90];
To the other answers: no. Just no.
Actual answer:
How do I make an array of CGFloats in objective c?
First of all, this is Objective-C, not C. Technically you can use malloc, but that's a really terrible hack. You should convert to an NSNumber and then you can populate the NSArray. After, you can convert back using NSNumber's floatValue method. This way is proper Objective-C. Mixing and matching C and Obj-C just creates spaghetti code which is hard to read and eventually becomes unmaintainable.
I got it.
NSInteger count,index;
double *dArray;
count = pArray.count;
dArray = (double *) malloc(sizeof(double) * count);
for (index = 0; index < count; index++) {
dArray[index] = [[pArray objectAtIndex:index] floatValue];
}
aGradient = [[NSGradient alloc] initWithColors:cArray atLocations:dArray colorSpace:space];
Simple question on how to insert a line break using SKLabelNode class in SpriteKit. I have the following code but it does not work -
SKLabelNode *nerdText = [SKLabelNode labelNodeWithFontNamed:#"Times"];
NSString *st1 = #"Test break";
NSString *st2 = #"I want it to break";
NSString *test = [NSString stringWithFormat:#"%#,\r%#",st1,st2]; //Even tried \n
nerdText.text = test;
nerdText.fontSize = 11;
nerdText.fontColor = [SKColor colorWithRed:0.15 green:0.15 blue:0.3 alpha:1.0];
nerdText.position = CGPointMake(150.0, 250.0);
[self addChild:nerdText];
Please help me out!
I dont think you can, here is a "hack" way to do it
SKNode *nerdText = [SKNode node];
SKLabelNode *a = [SKLabelNode labelNodeWithFontNamed:#"Arial"];
a.fontSize = 16;
a.fontColor = [SKColor yellowColor];
SKLabelNode *b = [SKLabelNode labelNodeWithFontNamed:#"Arial"];
b.fontSize = 16;
b.fontColor = [SKColor yellowColor];
NSString *st1 = #"Line 1";
NSString *st2 = #"Line 2";
b.position = CGPointMake(b.position.x, b.position.y - 20);
a.text = st1;
b.text = st2;
[nerdText addChild:a];
[nerdText addChild:b];
nerdText.position = CGPointMake(150.0, 250.0);
[self addChild:nerdText];
I had the same problem. I created a drop-in replacement for SKLabelNode called DSMultilineLabelNode that supports word wrap, line breaks, etc. The underlying implementation draws the string into a graphics context and then applies that to a texture on an SKSpriteNode.
It's available on GitHub at:
https://github.com/downrightsimple/DSMultilineLabelNode
static func multipleLineText(labelInPut: SKLabelNode) -> SKLabelNode {
let subStrings:[String] = labelInPut.text!.componentsSeparatedByString("\n")
var labelOutPut = SKLabelNode()
var subStringNumber:Int = 0
for subString in subStrings {
let labelTemp = SKLabelNode(fontNamed: labelInPut.fontName)
labelTemp.text = subString
labelTemp.fontColor = labelInPut.fontColor
labelTemp.fontSize = labelInPut.fontSize
labelTemp.position = labelInPut.position
labelTemp.horizontalAlignmentMode = labelInPut.horizontalAlignmentMode
labelTemp.verticalAlignmentMode = labelInPut.verticalAlignmentMode
let y:CGFloat = CGFloat(subStringNumber) * labelInPut.fontSize
print("y is \(y)")
if subStringNumber == 0 {
labelOutPut = labelTemp
subStringNumber++
} else {
labelTemp.position = CGPoint(x: 0, y: -y)
labelOutPut.addChild(labelTemp)
subStringNumber++
}
}
return labelOutPut
}
As of iOS 11/ macOS 10.13, SKLabelNode has a numberOfLines property that behaves in a similar way to the one that UILabel has. By default it's set to 1. If you set it to zero, you can have an unlimited number of lines. See also lineBreakMode and preferredMaxLayoutWidth. I thought it was worth pointing this out here in case anyone arrives at this page before they see the Apple documentation. If your minimum build target is iOS 11/ macOS 10.13, you don't need the helper methods posted above.
Here is another five minute hack by yours truly. It's not too bad.
+(SKSpriteNode*)spritenodecontaininglabelsFromStringcontainingnewlines:(NSString*)text fontname:(NSString*)fontname fontcolor:(NSColor*)colorFont fontsize:(const CGFloat)SIZEFONT verticalMargin:(const CGFloat)VERTICALMARGIN emptylineheight:(const CGFloat)EMPTYLINEHEIGHT {
NSArray* strings = [text componentsSeparatedByString:#"\n"];
//DLog(#"string count: %lu", (unsigned long)strings.count);
NSColor* color = NSColor.clearColor;
#ifdef DEBUG
color = [NSColor colorWithCalibratedRed:1 green:0 blue:0 alpha:0.5];
#endif
SKSpriteNode* spritenode = [SKSpriteNode spriteNodeWithColor:color size:CGSizeMake(0, 0)];
CGFloat totalheight = 0;
CGFloat maxwidth = 0;
NSMutableArray* labels = [NSMutableArray array];
for (NSUInteger i = 0; i < strings.count; i++) {
NSString* str = [strings objectAtIndex:i];
const BOOL ISEMPTYLINE = [str isEqualToString:#""];
if (!ISEMPTYLINE) {
SKLabelNode* label = [SKLabelNode labelNodeWithFontNamed:fontname];
label.text = str;
label.fontColor = colorFont;
label.fontSize = SIZEFONT;
const CGSize SIZEOFLABEL = [label calculateAccumulatedFrame].size;
if (SIZEOFLABEL.width > maxwidth)
maxwidth = SIZEOFLABEL.width;
totalheight += SIZEOFLABEL.height;
[labels addObject:label];
}
else {
totalheight += EMPTYLINEHEIGHT;
[labels addObject:[NSNull null]];
}
if (i + 1 < strings.count)
totalheight += VERTICALMARGIN;
}
spritenode.size = CGSizeMake(maxwidth, totalheight);
//DLog(#"spritenode total size: %#", NSStringFromSize(spritenode.size));
CGFloat y = spritenode.size.height * 0.5;
const CGFloat X = 0;
for (NSUInteger i = 0; i < strings.count; i++) {
id obj = [labels objectAtIndex:i];
if ([obj isKindOfClass:SKLabelNode.class]) {
SKLabelNode* label = obj;
label.verticalAlignmentMode = SKLabelVerticalAlignmentModeTop;
label.position = ccp(X, y);
[spritenode addChild:label];
const CGSize SIZEOFLABEL = [label calculateAccumulatedFrame].size;
y -= SIZEOFLABEL.height;
}
else {
y -= EMPTYLINEHEIGHT;
}
if (i + 1 < labels.count)
y -= VERTICALMARGIN;
}
return spritenode;
}
Btw you will need
static inline CGPoint ccp( CGFloat x, CGFloat y )
{
return CGPointMake(x, y);
}
So after doing a bit of research I learned that SkLabelNode was not intended to have multiline strings involved. Since functionality is limited with SKLabelNode it makes more sense to simply use a UILabel to hold the place of your text. Learning how to smoothly implement UI elements into sprite kit has made life a whole lot easier. UI elements are created programmatically, and added to your scene by using
[self.view addsubview:(your UIelement)];
So all you have to do
1.Initialize an instance of the UIelement in this case a UIlabel
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(50, 50, 100, 100)];
label.backgroundColor = [UIColor whiteColor];
label.textColor = [UIColor blackColor];
label.text = #"helllllllllo";
2. After you have created your UIelement just add it TO THE VIEW Using the method described above
3.I have found it important to note that UI elements and SK elements do not interact the same when it comes to positioning. There are some simple methods provided such as convertPointToView:
-(CGPoint)convertPointToView(CGPoint);
To help when it comes to converting points. I hope that helped Good Luck!
I wrote a solution for Swift 3.
An Xcode demo project is available on the open source GitHub project: https://github.com/benmorrow/Multilined-SKLabelNode
Here's the SKLabelNode extension:
extension SKLabelNode {
func multilined() -> SKLabelNode {
let substrings: [String] = self.text!.components(separatedBy: "\n")
return substrings.enumerated().reduce(SKLabelNode()) {
let label = SKLabelNode(fontNamed: self.fontName)
label.text = $1.element
label.fontColor = self.fontColor
label.fontSize = self.fontSize
label.position = self.position
label.horizontalAlignmentMode = self.horizontalAlignmentMode
label.verticalAlignmentMode = self.verticalAlignmentMode
let y = CGFloat($1.offset - substrings.count / 2) * self.fontSize
label.position = CGPoint(x: 0, y: -y)
$0.addChild(label)
return $0
}
}
}
Here's how you use it:
let text = "hot dogs\ncold beer\nteam jerseys"
let singleLineMessage = SKLabelNode()
singleLineMessage.fontSize = min(size.width, size.height) /
CGFloat(text.components(separatedBy: "\n").count) // Fill the screen
singleLineMessage.verticalAlignmentMode = .center // Keep the origin in the center
singleLineMessage.text = text
let message = singleLineMessage.multilined()
message.position = CGPoint(x: frame.midX, y: frame.midY)
message.zPosition = 1001 // On top of all other nodes
addChild(message)
Here's what the app looks like:
The alternative is to create a bitmap version of the text, then use the resulting image with a SKSpriteNode.
It's easier than it sounds.
An example, assume we have a string or an attributed string and a CGSize variable with the size of the resulting text area.
CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
// Assuming size is in actual pixels. Multiply size by the retina scaling
// factor if not.
CGContextRef context = CGBitmapContextCreate(NULL, (size_t)round(size.width), (size_t)round(size.height), 8, (size_t)round(size.width) * 4, rgbColorSpace, (CGBitmapInfo)kCGImageAlphaPremultipliedLast);
CGColorSpaceRelease(rgbColorSpace);
// Draw text, potentially flipping the coordinate system before
// (depending on methods you use).
// Make sure that you draw the font twice as big for retina.
// E.g. [#"My text" drawInRect:rect withAttributes:attr];
// Once we have drawn the text, simply extract the image and
// Make a texture from it.
CGImageRef image = CGBitmapContextCreateImage(context);
SKTexture *texture = [SKTexture textureWithCGImage:image];
CGImageRelease(image);
CGContextRelease(context);
// Texture created, so make a sprite node to use it.
SKSpriteNode *node = [self node];
node.texture = texture;
// Set the node size to the size in non-retina pixels, so if size was with
// scale factor already multiplied in, then we would need to divide by the scale
// factor.
node.size = size;
Here just to contribute my solution. I find myself wanting the same thing - to make multilines of SKLabelNode from a long string. Creating it one by one and manually positioning them is non practical. So I made an easier way to make multiline SKLabelNode. This method uses SKLabelNodes (and not capturing text into image).
Please see my solution if you are interested:
http://xcodenoobies.blogspot.com/2014/12/multiline-sklabelnode-hell-yes-please-xd.html
The result:
Lots of nice solutions here, but I didn't see any written in swift, so here we go. this function will take in one long string, and break it up where you place \n characters.
func createMultiLineText(textToPrint:String, color:UIColor, fontSize:CGFloat, fontName:String, fontPosition:CGPoint, fontLineSpace:CGFloat)->SKNode{
// create node to hold the text block
var textBlock = SKNode()
//create array to hold each line
let textArr = textToPrint.componentsSeparatedByString("\n")
// loop through each line and place it in an SKNode
var lineNode: SKLabelNode
for line: String in textArr {
lineNode = SKLabelNode(fontNamed: fontName)
lineNode.text = line
lineNode.fontSize = fontSize
lineNode.fontColor = color
lineNode.fontName = fontName
lineNode.position = CGPointMake(fontPosition.x,fontPosition.y - CGFloat(textBlock.children.count ) * fontSize + fontLineSpace)
textBlock.addChild(lineNode)
}
// return the sknode with all of the text in it
return textBlock
}
So I know this question is a little older, but just incase any comes back to it like I have, there's now a property preferredMaxLayoutWidth that you can use in conjunction with lineBreakMode and numberOfLines:
Example:
let longMessage = "Super super super super super super super super super long text"
let label = SKLabelNode(fontNamed: "Thonburi")
label.text = longMessage
label.fontSize = 24
label.fontColor = SKColor.black
// set preferredMaxLayoutWidth to the width of the SKScene
label.preferredMaxLayoutWidth = size.width
label.lineBreakMode = .byWordWrapping
label.numberOfLines = 0
addChild(label)
Like several others I have implemented a solution to this problem myself. It's a simple SKLabelNode subclass which can be used as a replacement for the regular SKLabelNode. I find subclassing the best approach for this functionality as I use it "everywhere" "all" the time...
The whole thing is available at github (for anyone interested) but the main gist is as follows: It separates the string and creates regular SKLabelNode instances and ads these as children of the node. This is done whenever setText: is invoked:
- (void)setText:(NSString *)text{
self.subNodes = [self labelNodesFromText:text];
[self removeAllChildren];
for (SKLabelNode *childNode in self.subNodes) {
[self addChild:childNode];
}
_text = #""; // (synthesized in the implementation)
}
The label subnodes are created here:
- (NSArray *)labelNodesFromText:(NSString *)text{
NSArray *substrings = [text componentsSeparatedByString:#"\n"];
NSMutableArray *labelNodes = [[NSMutableArray alloc] initWithCapacity:[substrings count]];
NSUInteger labelNumber = 0;
for (NSString *substring in substrings) {
SKLabelNode *labelNode = [SKLabelNode labelNodeWithFontNamed:self.fontName];
labelNode.text = substring;
labelNode.fontColor = self.fontColor;
labelNode.fontSize = self.fontSize;
labelNode.horizontalAlignmentMode = self.horizontalAlignmentMode;
labelNode.verticalAlignmentMode = self.verticalAlignmentMode;
CGFloat y = self.position.y - (labelNumber * self.fontSize * kLineSpaceMultiplier); // kLineSpaceMultiplier is a float constant. 1.5 is the value I have chosen
labelNode.position = CGPointMake(self.position.x, y);
labelNumber++;
[labelNodes addObject:labelNode];
}
return [labelNodes copy];
}
As you might have noticed I also have a property subNodes (array). This comes in handy elsewhere as the full implementation also allows for changing any of properties with the regular SKLabelNode syntax. (Text, fontName, fontSize, alignment etc.)
If anyone is interested, I've created a better SKLabelNode called SKLabelNodePlus that has multi-line support like Chris Allwein's but also has other features I find pretty useful.
Check it out on GitHub:
https://github.com/MKargin0/SKLabelNodePlus
Using https://github.com/downrightsimple/DSMultilineLabelNode and How to write text on image in Objective-C (iOS)? for reference this is what I did for a quick and dirty way to get a text-wrapping SKNode (Xcode 7.1.1):
-(SKNode*)getWrappingTextNode:(NSString*)text maxWidth:(CGFloat)width {
UIImage *img = [self drawText:text widthDimension:width];
return [SKSpriteNode spriteNodeWithTexture:[SKTexture textureWithImage:img]];
}
-(UIImage*)drawText:(NSString*)text widthDimension:(CGFloat)width {
NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
paragraphStyle.alignment = NSTextAlignmentLeft; //or whatever alignment you want
UIFont *font = [UIFont fontWithName:#"Verdana" size:22]; //or whatever font you want
NSDictionary *att = #{NSFontAttributeName:font, NSParagraphStyleAttributeName: paragraphStyle};
//using 800 here but make sure this height is greater than the potential height of the text (unless you want a max-height I guess but I did not test max-height)
CGRect rect = [text boundingRectWithSize:CGSizeMake(width, 800) options:NSStringDrawingUsesLineFragmentOrigin attributes:att context:nil];
UIGraphicsBeginImageContextWithOptions(rect.size, NO, 0.0f);
[text drawInRect:rect withAttributes:att];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
Here is a quick and easy function I wrote to just make life easier.
Step 1) Pass in a string, get a SKSpriteNode.
Step 2) Add sprite node to scene.
/******************************************************************************/
- (SKSpriteNode*) ConvertString: (NSString*) str
WithFontSize: (NSInteger) font_size
ToParagraphWithSize: (CGSize) para_size
{
SKSpriteNode* paragraph = [[SKSpriteNode alloc] initWithColor: [SKColor clearColor]
size: para_size];
// Set the anchor point to the top left corner. This is where English
// paragraphs usually start
paragraph.anchorPoint = CGPointMake(0,1);
// Create an array to hold multilple sub strings. These sub strings will
// become multiple SKLabels that will be added to the paragraph sprite node
// created above
NSMutableArray* str_arr = [[NSMutableArray alloc] init];
// Lets separate words by a single space.
NSArray* word_arr = [str componentsSeparatedByString:#" "];
// 50% is an approximate character height to width ratio. Change this
// number to adjust the number of characters per line you would like.
// Increase it if you have a lot of capitol W's
float est_char_width = font_size * 0.50;
NSInteger num_char_per_line = para_size.width / est_char_width;
// For every word in the original string, make sure it fits on the line
// then add it to the string array.
NSString* temp_str = #"";
for (NSString* word in word_arr)
{
if ((NSInteger)word.length <= num_char_per_line - (NSInteger)temp_str.length)
{
temp_str = [NSString stringWithFormat:#"%# %#", temp_str, word];
}
else
{
[str_arr addObject: temp_str];
temp_str = word;
}
}
[str_arr addObject: temp_str];
// For every sub string, create a label node and add it to the paragraph
for (int i = 0; i < str_arr.count; i++)
{
NSString* sub_str = [str_arr objectAtIndex: i];
SKLabelNode* label = [self CreateLabelWithText: sub_str];
label.fontSize = 14;
label.position = CGPointMake(0, -(i+1) * font_size);
[paragraph addChild: label];
}
return paragraph;
}
/******************************************************************************/
- (SKLabelNode*) CreateLabelWithText: (NSString*) str
{
enum alignment
{
CENTER,
LEFT,
RIGHT
};
SKLabelNode* label;
label = [SKLabelNode labelNodeWithFontNamed:#"ChalkboardSE-Light"];
label.name = #"label_name";
label.text = str;
label.zPosition = 1;
label.horizontalAlignmentMode = LEFT;
label.fontColor = [SKColor whiteColor];
return label;
}
I have written a utility method to take a string and divide it up into an array of strings with a given maximum length. It automatically ends each line with a whole word and removes leading whitespace. Hope it helps somebody!
- (NSArray*)linesFromString:(NSString*)string withMaxLineLength:(int)maxLineLength;
{
NSMutableArray *lines = [NSMutableArray arrayWithCapacity:1];
BOOL gotLine = NO;
BOOL doneFormat = NO;
BOOL endOfString = NO;
int innerLoops = 0;
int outerLoops = 0;
int lineIndex = 0;
int currentStringIndex = 0;
int stringLength = (int)[string length];
int rangeLength = maxLineLength;
NSString *line;
NSString *testChar;
NSString *testChar2;
while (!doneFormat) {
outerLoops++;
while (!gotLine) {
endOfString = NO;
innerLoops++;
line = [string substringWithRange:NSMakeRange(currentStringIndex, rangeLength)];
testChar = [line substringWithRange:NSMakeRange(0, 1)];
if (currentStringIndex + rangeLength > [string length] - 1) {
endOfString = YES;
} else {
testChar2 = [string substringWithRange:NSMakeRange(currentStringIndex + rangeLength, 1)];
}
//If the line starts with a space then advance 1 char and try again.
if ([testChar isEqualToString:#" "]) {
currentStringIndex++;
// If we were at the end of the string then reduce the rangeLength as well.
if (endOfString) {
rangeLength--;
}
// else, if this line ends at the end of a word (or the string) then it's good. ie next char in the string is a space.
} else if ([testChar2 isEqualToString:#" "] || endOfString) {
gotLine = YES;
currentStringIndex += [line length];
// else, make the line shorter by one character and try again
} else if (rangeLength > 1){
rangeLength--;
// Otherwise the word takes up more than 1 line so use it all.
} else {
line = [string substringWithRange:NSMakeRange(currentStringIndex, maxLineLength)];
currentStringIndex += [line length];
gotLine = YES;
}
// Make sure we're not stuck in an endless loop
if (innerLoops > 1000) {
NSLog(#"Error: looped too long");
break;
}
}
// If we processed a line, and the line is not nil, add it to our array.
if (gotLine && line) {
[lines insertObject:line atIndex:lineIndex];
lineIndex++;
}
// Reset variables
rangeLength = maxLineLength;
gotLine = NO;
// If the current index is at the end of the string, then we're done.
if (currentStringIndex >= stringLength) {
doneFormat = YES;
// If we have less than a full line left, then reduce the rangeLength to avoid throwing an exception
} else if (stringLength - (currentStringIndex + rangeLength) < 0) {
rangeLength = stringLength - currentStringIndex;
}
// Make sure we're not stuck in an endless loop
if (outerLoops > 1000) {
NSLog(#"Error: Outer-looped too long");
break;
}
}
return lines;
}
And then I just call it and create some label nodes to add to my layer node as follows. I'm aligning my line labels underneath and with the left edge of button2, so it all lines up left justified.
CGFloat fontSize = 30.0f;
int lineCount;
NSString *description = [product localizedDescription];
NSString *line;
NSArray *lines = [self linesFromString:description withMaxLineLength:43];
if (lines) {
lineCount = (int)[lines count];
for (int i = 0; i < lineCount; i++) {
line = [lines objectAtIndex:i];
// Create a new label for each line and add it to my SKSpriteNode layer
SKLabelNode *label = [SKLabelNode labelNodeWithFontNamed:#"Superclarendon-Black"];
label.text = line;
label.fontSize = fontSize;
label.scale = 1.0f;
label.name = #"lineLabel";
label.fontColor = [UIColor blackColor];
label.horizontalAlignmentMode = SKLabelHorizontalAlignmentModeLeft;
label.position = CGPointMake(button2.position.x - button2.size.width * 0.5f, button2.position.y - button2.size.height - i * fontSize * 1.1);
[layer addChild:label];
}
}
In the scene editor, change the SKLabelNode's text to attributed in the attributes inspector in the right pane, as shown below.
Doing so will give you very much freedom to customize the text that is displayed without having to create multiple SKLabelNode instances or a UIImage. For instance, you can create a paragraph as shown below.
For programmatic interaction, use the attributedString property of the label node to add custom attributes.
label.numberOfLines = 0 //equates to multiple lines
label.numberOfLines.preferredMaxLayoutWidth = screenWidth
Does anybody know the best practice approach to getting an array of CCMenuItems to align to a grid? This is a cocos2d question
For example :
int levelCount = 10;
CCMenu *menuArray = [CCMenu menuWithItems:nil];
for (int x = 1; x<=levelCount; x++) {
CCLOG(#"Creating level icon for Level %i", x);
[menuArray addChild:[CCMenuItemImage itemFromNormalImage:#"Button2n.png"
selectedImage:#"Button2s.png"
target:self
selector:#selector(onPlay:)]];
}
[menuArray alignToGridWouldbeGreat????!!!!];
[self addChild:menuArray];
I can align vertically, horizontally, in columns or rows however cannot wrap a column or row configuration.
Thanks in advance!
You just have to call one of the overloaded alignItemsInColumns or alignItemsInRows methods. For example if you have 15 menu items and you want 3 rows of 5 columns, do this:
CCMenu* menu = [CCMenu menuWithItems:...];
NSNumber* itemsPerRow = [NSNumber numberWithInt:5];
[menu alignItemsInColumns:itemsPerRow, itemsPerRow, itemsPerRow, nil];
The only down side is that there doesn't seem to be a way to set padding when aligning to a grid.
Ok, while not as flexible as I would like, I've got a decent enough solution for my purposes. Anyone else can feel free to use this code if they too find it useful.
//////// Put images (or whatever) for all levels in an array /////////
int levelCount = 15;
NSMutableArray* menuArray = [NSMutableArray arrayWithCapacity:levelCount];
for (int x = 1; x<=levelCount; x++) {
CCLOG(#"Creating level icon for Level %i", x);
CCMenuItemImage* item = [CCMenuItemImage itemFromNormalImage:#"Button2n.png"
selectedImage:#"Button2s.png"
target:self
selector:#selector(onPlay:)];
[menuArray addObject:item];
}
//////// arrange in a grid with specific number of columns /////////
CGSize screenSize = [CCDirector sharedDirector].winSize;
int columns = 5;
int spaceBetweenColumns = columns + 1;
int spacing = screenSize.width / spaceBetweenColumns;
CCLOG(#"screenWidth (%f) / columnsWithEdges (%i) = spacing = %i, ", screenSize.width, spaceBetweenColumns, spacing);
CGPoint currentDrawPoint = CGPointMake(0, screenSize.height - spacing); // start at the top
for (CCMenuItem *item in menuArray) {
currentDrawPoint.x = currentDrawPoint.x + spacing;
if (currentDrawPoint.x > (columns * spacing)) {
// start a new line as we have reached the end of the previous one
currentDrawPoint.x = spacing;
currentDrawPoint.y = currentDrawPoint.y - spacing;
}
item.position = currentDrawPoint;
[self addChild:item];
}
Here is my solution, i hope it helps.
First define this struct somewhere:
typedef struct
{
int cols;
}RowInfo;
Then:
-(void)layoutMenu:(CCMenu *)menu rowInfo:(RowInfo[])inf rows:(int)rows padding:(CGPoint)padding
{
CCMenuItem *dummy = (CCMenuItem *)[menu.children objectAtIndex:0];
int itemIndex = 0;
float w = dummy.contentSize.width;
float h = dummy.contentSize.height;
CGSize screenSize = [[CCDirector sharedDirector]winSize];
CCArray *items = [menu children];
float startX;
for (int i = rows - 1; i >=0; i--)
{
int colsNow = info[i].cols;
startX = (screenSize.width - (colsNow * w + padding.x * (colsNow - 1)))/2;
float y = i * (padding.y + h);
for (int j = 0; j < colsNow; j++)
{
CCMenuItem *item = (CCMenuItem *)[items objectAtIndex:itemIndex];
item.anchorPoint = ccp(0,0);
item.position = ccp(startX, y);
startX += padding.x + w;
itemIndex++;
}
}
}
The call goes like this(a custom keyboard):
//create custom keyboard
NSArray *captions = [NSArray arrayWithObjects:
#"Q", #"W", #"E", #"R", #"T", #"Y", #"U", #"I", #"O", #"P",
#"A", #"S", #"D", #"F", #"G",#"H", #"J", #"K", #"L",
#"Z", #"X", #"C", #"V", #"B", #"N", #"M", nil];
CCMenu *menu = [CCMenu menuWithItems:nil];
[self addChild:menu];
for (NSString *caption in captions)
{
CCLabelTTF *label = [CCLabelTTF labelWithString:caption fontName:#"Courier" fontSize:25];
CCMenuItemLabel *item = [CCMenuItemLabel itemWithLabel:label target:self selector:#selector(callDelegate:)];
[menu addChild:item];
}
RowInfo info[3] = {{7}, {9}, {10}}; //inverse order
[self layoutMenu:menu withRowInfo:info rows:3 padding:ccp(15, 15)];
May be you can try this....
[menuArray alignItemsVerticallyWithPadding:20.0];
or
[first_menu alignItemsHorizontallyWithPadding:20.0];
To the best of my knowledge Anish's answer is your best course of action. It would be the same as aligning to a grid and it is what I personally use. Just set your menu position and alignment padding and you should have what you are looking for.