I have a UIView class, to create the structure, I do:
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
//creo la view
CGRectMake(0, 0, 100, 100); //I would just like the frame size
self.clipsToBounds = YES;
}
return self;
}
so I make the location and size of the frame.
I call this class in the main UIViewController
is there a way to just create the size of frame in the class, and in the UIViewController set the position?
MyClass *myClass1 = [[Item alloc] initWithFrame:CGRectMake(0, 0, 100, 100)]; //I would just like the frame position
[self.view addSubview:myClass1];
thanks a lot!
I think you are looking at something like initWithOrigin:.
- (id)initWithOrigin:(CGPoint)origin {
CGSize size = CGSizeMake(100,100);
CGRect frame;
frame.origin = origin;
frame.size = size;
return [self initWithFrame:frame];
}
Now you can use it as,
MyClass *myClass1 = [[MyClass alloc] initWithOrigin:CGPointMake(0,0)];
[self.view addSubview:myClass1];
Related
I have a custom cell in a UITableView using an xib file. I programatically created a UILabel with a height of 200 and a width of 50. When I do an NSLog in the customCell.m of the label's width and height, it gives me w: 50 and h: 200. But when I do an NSLog in mainViewController.m it gives me 0 for the height and width.
Not sure why it does that. I need to get the real height of the label in the mainViewController.m
Here's my code:
customCell.m
- (void)awakeFromNib
{
self.label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 200)];
[self.label setText:#"This is a label"];
[self.myView addSubview:self.label];
NSLog(#"%f", self.label.frame.size.height); // Results: 200.0000
}
mainViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
customCell *cellVC = [[cutsomCell alloc] init];
NSLog(#"%f, %f", cellVC.label.frame.size.height); // Results: 0.0000
}
Isn't awakeFromNib supposed to get called the mainViewController.m at viewDidLoad if I use an xib file? If not, how do I call it in viewDidLoad?
awakeFromNib is an initializer called when you load from nib..ie you add a view and change its class to your custom class in storyboard/nib and this porcess will call awakeFromNib method..not programatically
When done programatically use init method for the purpose or a custom initializer
-(id)init
{
//class super init calls
//then method calls
self.label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 200)];
[self.label setText:#"This is a label"];
[self.myView addSubview:self.label];
//return self
}
Example
- (id) init {
// Call superclass's initializer
self = [super init];
if(self) {
self.label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 200)];
[self.label setText:#"This is a label"];
[self.myView addSubview:self.label];
}
return self;
}
I am building an application (without interface builder!) which 'lives' in the NSStatusBar; when you click on an icon in the StatusBar a NSWindow with a NSScrollView appears. The window appears but it seems that something is preventing user interaction with the ScrollView
To find out where the problem comes from I also added my view to the main windows contentView in the AppDelegate, strange thing is that the scrollview is interactive in the MainWindow... Anyone knows why it doesn't work in my new Window?
This is the code I use to create the new TTDropDownWindow:
- (void)openWindow {
// Dropdown
if (self.dropDownWindow == nil) {
self.dropDownWindow = [[TTDropDownWindow alloc] init];
self.dropDownWindow.releasedWhenClosed = NO;
self.dropDownWindow.contentView = self.view;
self.dropDownWindow.backgroundColor = [NSColor clearColor];
self.dropDownWindow.delegate = self;
self.dropDownWindow.alphaValue = 1;
self.dropDownWindow.hasShadow = NO;
self.dropDownWindow.opaque = NO;
}
[[NSApplication sharedApplication] activateIgnoringOtherApps:YES];
NSRect statusBarContentRect = self.statusBarItemView.window.frame;
NSPoint statusBarOriginPoint = NSMakePoint(NSMidX(statusBarContentRect), NSMinY(statusBarContentRect));
NSRect screenFrame = self.dropDownWindow.screen.frame;
NSRect dropDownContentRect = NSZeroRect;
dropDownContentRect.size.width = DROP_DOWN_WIDTH;
dropDownContentRect.size.height = DROP_DOWN_HEIGHT;
dropDownContentRect.origin.x = statusBarOriginPoint.x - DROP_DOWN_WIDTH / 2;
dropDownContentRect.origin.y = screenFrame.size.height - DROP_DOWN_HEIGHT - NSStatusBar.systemStatusBar.thickness;
[self.dropDownWindow setFrame:dropDownContentRect display:YES];
[self.dropDownWindow makeKeyAndOrderFront:nil];
}
This is the implementation of TTDropDownWindow:
#import "TTDropDownWindow.h"
#import "WFConstants.h"
#implementation TTDropDownWindow
- (id) init
{
self = [super initWithContentRect:NSMakeRect(0, 0, DROP_DOWN_WIDTH, DROP_DOWN_HEIGHT) styleMask:NSBorderlessWindowMask backing:NSBackingStoreRetained defer:NO];
return self;
}
- (BOOL)canBecomeMainWindow {
return YES;
}
- (BOOL)canBecomeKeyWindow {
return YES;
}
#end
And this is the code that creates the View and the ScrollView
#import "TTStatusBarDropDownView.h"
#import "TTTestView.h"
#implementation TTStatusBarDropDownView
#synthesize dropDownTableViewData = dropDownTableViewData_;
- (id)initWithFrame:(NSRect)frameRect {
self = [super initWithFrame:frameRect];
if (self) {
NSImageView *imageView = [[NSImageView alloc] initWithFrame:frameRect];
imageView.image = [NSImage imageNamed:#"background-dropdown"];
[self addSubview:imageView];
// first create a view to put in a ScrollView
NSView *scrollViewHolder = [[TTTestView alloc] initWithFrame:NSMakeRect(19, 98, 414, 543) andColor:[NSColor yellowColor]];
[self addSubview:scrollViewHolder];
// create the scrollView
NSScrollView *scrollView = [[NSScrollView alloc] initWithFrame:NSMakeRect(0, 0, 414, 543)];
scrollView.hasVerticalRuler = YES;
scrollView.hasVerticalScroller = YES;
[scrollViewHolder addSubview:scrollView];
// TTTestView is just a NSView with a background drawing
TTTestView *theViewThatScrolls = [[TTTestView alloc] initWithFrame:NSMakeRect(0, 0, 200, 10000) andColor:[NSColor blueColor]];
[theViewThatScrolls addSubview:[[TTTestView alloc] initWithFrame:NSMakeRect(10, 10, 100, 8000) andColor:[NSColor grayColor]]];
[scrollView setDocumentView:theViewThatScrolls];
}
return self;
}
#end
You might change NSBackingStoreRetained to NSBackingStoreBuffered as stated over here:
NSScrollView in a NSWindow
how to change the width of the UIPickerView in objective C, I am using the following code,
tempFiled = Data;
[tempFiled resignFirstResponder];
CGSize sizeOfPopover = CGSizeMake(200, 200);
CGPoint positionOfPopover = CGPointMake(32, 325);
[popOverControllerWithPicker presentPopoverFromRect:CGRectMake(positionOfPopover.x, positionOfPopover.y+10, 500, sizeOfPopover.height)
inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];
But when i am trying to change the width in CGSize sizeOfPopover = CGSizeMake(200, 200); its not changing, i want to reduce the size of the picker.
I had this problem and solved it this way:
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
CGRect frame = bpsPicker.frame;
frame.size.width = 100; // width to be displayed on popover controller
bpsPicker.frame = frame;
}
Using ViewDidLoad() is too early to alter this value.
To be clear the viewWillAppear is in the UIViewController that is passed to the UIPopover (here called 'MyViewController.m').So,
self.myViewController = [[MyViewController alloc] initWithNibName:#"MyViewController" bundle:nil] ;
self.myViewController.delegate = self;
self.myViewController.contentSizeForViewInPopover = CGSizeMake(320, 360); // or whatever
self.myViewControllerPopover = [[UIPopoverController alloc] initWithContentViewController:self.myViewController] ;
[self.myViewControllerPopover presentPopoverFromBarButtonItem:self.myToolBarButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
I created view-based application.
I have got a sampleGameViewContrioller.xib, which contains main View, and child View, which connected with class Behavior.
SampleViewController.xib:
View
View <- Behavior
In sampleViewContoller.m I create instance of the class Behavior:
Behavior *b = [[Behavior alloc] initilizeWithType:#"type" position:rect mapArray:arrMap];
Behavior.m:
-(id) initilizeWithType:(NSString *)type position:(CGRect) pos mapArray:(NSMutableArray *) mapArr {
self = [super initWithFrame:CGRectMake(0, 0, 1024, 570)];
if (self != nil) {
if ([type isEqualToString:#"type"]) {
arrMap = mapArr;
self.rectForDraw = pos;
self.file = [[NSString alloc]initWithString:#"girl.png"];
UIImageView *imgg = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"girl.png"]];
imgg.frame = rect;
[self addSubview:imgg];
timer = [NSTimer scheduledTimerWithTimeInterval:0.015 target:self selector:#selector(moving:) userInfo:nil repeats:YES];
}
}
return self;}
But it doesn't work. Image doesn't add to my View.
if I add imageView in -(void)drawRect:(CGRect) rect, it's working:
- (void)drawRect:(CGRect)rect {
self.img = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"girl.png"]];
self.img.frame = CGRectMake(100, 100, 100, 100);
[self addSubview:self.img]; }
But i should send parameters of drawing in class Behavior through constructor. How to add imageView without method drawRect, with my constructor?
sorry for my English :)
If u want to add an image view over simple UIView then just do [self.view addSubview:imageview]; If you are getting that Image from Behaviour class method then return UIImageView from that method and the add it to your view
Try this:
Behavior *b = [[Behavior alloc] init];
Then write one method in Behaviour class
-(UIImageView*) initilizeWithType:(NSString *)type position:(CGRect) pos mapArray:(NSMutableArray *) mapArr {
// Your Logic
return imgView; //UIImageView object
}
Then call this method in your viewcontroller as
UIImageView *imgView=[b initilizeWithType:#"YOUR STRING" position:YOUR RECT pos mapArray:YOUR ARRAY ];
imgg.frame = rect;
This line assigns your imageView frame to... nothing as far as I can see. Should this be pos or rectForDraw? When adding to your view in drawRect you are explicitly setting a real frame so this is probably where the difference lies.
I create a custom view in cocoa touch that is superclassed by UIView and in my main controller I initialize it and then add it as a subview to the main view, but when I add it to the main view it calls my initializer method again and causes an infinite loop. Am I going about creating my custom view wrong?
Here is the mainView
- (void)loadView {
UIImage* tempImage = [UIImage imageNamed: #"image1.jpg"];
CustomImageContainer *testImage = [[CustomImageContainer alloc] initWithImage: tempImage andLabel: #"test image" onTop: true atX: 10 atY: 10];
[self.view addSubview: testImage];
}
and the CustomImageContainer
-(CustomImageContainer *) initWithImage: (UIImage *)imageToAdd andLabel: (NSString *)text onTop: (BOOL) top atX: (int) x_cord atY: (int) y_cord{
UIImageView *imageview_to_add = [[UIImageView alloc] initWithImage: imageToAdd];
imageview_to_add.frame = CGRectMake(0, 0, imageToAdd.size.width, imageToAdd.size.height);
UILabel *label_to_add = [[UILabel alloc] init];
label_to_add.text = text;
label_to_add.alpha = 50;
label_to_add.backgroundColor = [UIColor blackColor];
label_to_add.textColor = [UIColor whiteColor];
[self addSubview: imageview_to_add];
self.frame = CGRectMake(x_cord, y_cord, imageToAdd.size.width, imageToAdd.size.height);
if (top) {
label_to_add.frame = CGRectMake(0, 0, imageview_to_add.frame.size.width, imageview_to_add.frame.size.height);
//[self addSubview: label_to_add];
}
else {
label_to_add.frame = CGRectMake(0,.2 * imageview_to_add.frame.size.height, imageview_to_add.frame.size.width, imageview_to_add.frame.size.height);
}
[self addSubview: label_to_add];
[super init];
return self;
}
Why did you put the [super init] statement at the end of the initializer ? When subclassing, you usually put this statement at the start of method.
For UIView subclasses, the designated initializer when creating views in code is initWithFrame:, so you should call it before adding the label and the image. You can use the image to compute the frame needed by the custom view.
-(CustomImageContainer *) initWithImage: (UIImage *)imageToAdd andLabel: (NSString *)text onTop: (BOOL) top atX: (int) x_cord atY: (int) y_cord{
// The view will gets its frame to the size of the image
UIImageView *imageview_to_add = [[UIImageView alloc] initWithImage: imageToAdd];
// Call the designated initializer
CGRect frame = CGRectMake(x_cord, y_cord, imageToAdd.size.width, imageToAdd.size.height);
self = [super initWithFrame:frame];
[self addSubview: imageview_to_add];
UILabel *label_to_add = [[UILabel alloc] init];
label_to_add.text = text;
label_to_add.alpha = 50;
label_to_add.backgroundColor = [UIColor blackColor];
label_to_add.textColor = [UIColor whiteColor];
if (top) {
label_to_add.frame = CGRectMake(0, 0, imageview_to_add.frame.size.width, imageview_to_add.frame.size.height);
}
else {
label_to_add.frame = CGRectMake(0,.2 * imageview_to_add.frame.size.height, imageview_to_add.frame.size.width, imageview_to_add.frame.size.height);
}
[self addSubview: label_to_add];
return self;
}
If you still have an infinite loop, pause the debugger and search for the recurrent method pattern in the stack trace. This pattern will gives you where the code enters the infinite loop.