I just want to be able to add a label to parent view dynamically i.e just by pressing a button.Not a real world application just learning.
Here is cut down version of the method it executes but can not see the label.
- (IBAction)addLabelToParentView
{
NSLog(#"button click");
UILabel* label ;
[label setText:#"test"];
[[self view] addSubview:label];
}
You need to initialize your label with a frame rectangle. Try the code below.
- (IBAction)addLabelToParentView
{
NSLog(#"button click");
UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(20.0, 20.0, 280.0, 30.0)];
[label setText:#"test"];
[[self view] addSubview:label];
}
Related
I am creating a game using Sprite Kit, want to add a text field over scene. Here is the code:
#interface MKMainMenuScene ()
//...
#property (nonatomic) NSTextField *field;
#end
#implementation MKMainMenuScene
- (void)didMoveToView:(SKView *)view
{
[super didMoveToView:view];
[self.view addSubview:_field];
}
- (id)initWithSize:(CGSize)size
{
if (self == [super initWithSize:size])
{
//...
_field = [[NSTextField alloc] initWithFrame:
NSMakeRect(self.frame.size.width / 2, self.frame.size.height / 2 + 20,
100, 40)];
[_field setBackgroundColor:[NSColor whiteColor]];
[_field setStringValue:#"Enter smth"];
}
return self;
}
But text field doesn't appear, it is under the scene. Does someone know what is the problem and how to solve it?
Got it working.
Must set necessary views as Layer-Backed Views. Tried doing this in the Nib, didn't work for me. So I did it in code.
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
/* Insert Label. FOR TESTING, may remove */
NSTextField *label = [[NSTextField alloc] initWithFrame:NSMakeRect(50, 50, 300, 300)];
[label setStringValue:#"Hello All"];
[label setTextColor:[NSColor whiteColor]];
[label setBackgroundColor:[NSColor redColor]];
[label setFont:[NSFont fontWithName:#"Helvetica" size:20]];
[[self.window contentView] addSubview:label];
/* SET LAYER BACK VIEW
* This is the one line code to make it work.
*/
[self.window.contentView setWantsLayer:YES];
}
UPDATE:
The above code will cause a freeze or a problem on either a SCNView or SKView. To fix this, don't set the UI as a subview, but as a sibling to SKView. And then set the UI as Layer-Backed by setWantsLayer.
Window
-> Content NSView
-> SKView/SCNView
-> NSTextField <-- Layer-Backed
Code:
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
/* Insert Label. FOR TESTING, may remove */
NSTextField *label = [[NSTextField alloc] initWithFrame:NSMakeRect(50, 50, 300, 300)];
// . . . .
[[self.window contentView] addSubview:label];
/* UPDATE */
[label setWantsLayer:YES];
}
Hope this helps someone else who's following my steps.
Try this one:
- (void)didMoveToView:(SKView *)view
{
[super didMoveToView:view];
[view addSubview:_field];
}
I have a view that has labels being dynamically added by the user. If the use would like to edit any of the labels, they press a button and all the labels get highlighted with a delete button and move button. (Editing is another bridge I’ll cross later).
My issue is: What is the best way to turn the buttons on and off? I have a method that turns the buttons on… but I am at a loss as to how I turn them off when done editing. Do I need to tag my buttons and then just ‘hide them’? Or do I just remove them all totally? How do I parse all the buttons that are turned on then, turn them off. Do I need to put them in an array as well? The labels are tagged with unique numbers so I know which label is which.
Any thoughts? Guidance? If I am doing it all wrong please tell me.
Here is a couple methods I have:
- (void) showEditableText {
// Parse the array of labels
if(textArray.count > 0){
for(UILabel *label in textArray){
//Add Delete Button
UIImage * delButtonImage = [UIImage imageNamed:#"GUI_Delete.png"];
UIButton * delThisButton = [[UIButton alloc] initWithFrame:CGRectMake(label.frame.origin.x - delButtonImage.size.width, label.frame.origin.y - delButtonImage.size.height, delButtonImage.size.width, delButtonImage.size.height)];
[delThisButton setBackgroundImage:delButtonImage forState:UIControlStateNormal];
[delThisButton addTarget:self action:#selector(deleteThisLabel:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:delThisButton];
//Add a move button
UIImage * moveButtonImage = [UIImage imageNamed:#"GUI_Move.png"];
UIButton * moveThisButton = [[UIButton alloc] initWithFrame:CGRectMake((label.frame.origin.x + label.frame.size.width + moveButtonImage.size.width), label.frame.origin.y - moveButtonImage.size.height, moveButtonImage.size.width, moveButtonImage.size.height)];
[moveThisButton setBackgroundImage:moveButtonImage forState:UIControlStateNormal];
[moveThisButton addTarget:self action:#selector(moveThisLabel:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:moveThisButton];
//Make the text highlighed
label.highlighted = YES;
label.backgroundColor = [UIColor colorWithRed:203/255.0f green:230/255.0f blue:239/255.0f alpha:1];
label.highlightedTextColor = [UIColor redColor];
}
}
}
- (void) doneEditingText {
if(textArray.count > 0){
for(UILabel *label in textArray){
//THIS IS WHERE I AM STUCK? WHAT DO I DO?
label.highlighted = NO;
label.backgroundColor = [UIColor clearColor];
}
}
}
//inside your first method set the same tag to your all buttons
-(void) showEditableText {
........
.......
.......
delThisButton.tag = 10;
moveThisButton.tag = 10;
}
//inside your second method delete all the subviews using this tag as shown below..
-(void) doneEditingText {
if(textArray.count > 0){
for(UILabel *label in textArray){
..............................
//THIS IS WHERE I AM STUCK? WHAT DO I DO?
for (UIView *subview in [self.view subviews]) {
if (subview.tag == 10) {
[subview removeFromSuperview];
}
}
...............................
label.highlighted = NO;
label.backgroundColor = [UIColor clearColor];
}
}
}
Move all your buttons code to viewDidLoad, hide them (button.hidden = YES). When you start/finish editing your text, unhide and hide your buttons. You need to have an ivar to contain the buttons too. So add them in your .h file.
Try This
UIView * seletetButton = nil;
for (UIView * btn in self.view.subviews){
if ([btn isKindOfClass:[UIButton class]])
{
if (seletetButton.tag != btn.tag)
{
[btn removeFromSuperview];
}
}
}
I have two UITextViews, self.instructions and self.textView, that are supposed to alternate depending on what the user selects.
I create a self.textView like so:
-(void)createSpaceToWrite
{
[self.instructions removeFromSuperview];
[self.bar removeFromSuperview];
[self createNavigationBar:#"Compose" selector:#"displayScreen" withDone:NO]; //This adds a UINavigationBar to the view.
if (!self.textView)
{
self.textView = [[UITextView alloc] initWithFrame:CGRectMake(20, 60, 280, 150)];
}
self.textView.backgroundColor = [UIColor whiteColor];
self.textView.font = [UIFont fontWithName:#"Helvetica Neue" size:14];
self.textView.text = #"";
[self.view addSubview:self.textView];
self.textView.delegate = self;
}
Then I create self.instructions like so:
-(void)haikuInstructions
{
[self.textView removeFromSuperview];
[self.bar removeFromSuperview];
[self createNavigationBar:#"Compose" selector:#"displayScreen" withDone:NO];
if (!self.instructions)
{
self.instructions = [[UITextView alloc] initWithFrame:CGRectMake(10, 125, [[UIScreen mainScreen] bounds].size.width - 10, [[UIScreen mainScreen] bounds].size.height)];
}
self.instructions.backgroundColor=[UIColor clearColor];
self.instructions.text = #"Text of instructions";
self.instructions.editable=NO;
[self.view addSubview:self.instructions];
[self resignFirstResponder];
}
The user starts with self.instructions displayed against the background image. Fine.
The user switches. The instruction text disappears, to be replaced by the editable self.textView, a white box. Fine.
The user switches back. The instruction text appears--but the white box is still there, even thought I've removed it from the superview. And not only that, it's still editable and still brings up the keyboard when the user goes to edit it!
What am I doing wrong?
EDIT: Well, I basically scrapped all the code and started the class over from scratch, trying to be cleaner about everything, and I'm no longer having this problem, so it must have been something in some other method that was affecting it. Lesson: haphazard coding is bad!
Why do you need to remove your text views interchangeably? Wouldn't it be better to just "hide" them interchangeably by setting the setHidden property like for example:
[self.textView setHidden: YES];
and additionally try the following also:
[self.textView resignFirstResponder];
[self.textView setEditable: NO];
[self.textView setBackgroundColor: [UIColor clearColor]];
[self.textView setAlpha: 0.0];
is there a way to hide the flip camera button inside the UIImagePickerController?
thanks for reading
!^_^!
I ended up using a custom subclass of UIImagePickerController to fix this (and other) issues:
#import "SMImagePickerController.h"
#implementation SMImagePickerController
void hideFlipButtonInSubviews(UIView *view) {
if ([[[view class] description] isEqualToString:#"CAMFlipButton"]) {
[view setHidden:YES];
} else {
for (UIView *subview in [view subviews]) {
hideFlipButtonInSubviews(subview);
}
}
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
hideFlipButtonInSubviews(self.view);
}
#end
You should be able to create an empty button inside an overlayview that you float on top of the flip camera button. I hacked the code below to test and it seemed to work. Give it a try.
UIView *cameraOverlayView = [[UIView alloc] initWithFrame:CGRectMake(screenSize.width - 100.0f, 5.0f, 100.0f, 35.0f)];
[cameraOverlayView setBackgroundColor:[UIColor blackColor]];
UIButton *emptyBlackButton = [[UIButton alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 100.0f, 35.0f)];
[emptyBlackButton setBackgroundColor:[UIColor blackColor]];
[emptyBlackButton setEnabled:YES];
[cameraOverlayView addSubview:emptyBlackButton];
cameraUI.allowsEditing = YES;
cameraUI.showsCameraControls = YES;
cameraUI.delegate = self;
cameraUI.cameraOverlayView = cameraOverlayView;
I want to implement tablecell in which there is one label with text = 0 and two button with text '+' and '-'
when i click + button then i want to increment text label by one.
when i click - button then i want to decrement text label by one.
Any idea how to change the label of uitablecell.
Thanks in advance.
- (UITableViewCell *) getCellContentView:(NSString *)cellIdentifier{
UIButton * mp;
UILabel *l1;
UITableViewCell *cell=[[[UITableViewCell alloc]initWithFrame: CGRectMake(0, 0, 300, 60) reuseIdentifier:nil] autorelease];
l1=[[UILabel alloc] initWithFrame:CGRectMake(100.0, 15.0, 400.0, 40.0)];
l1.tag=1;
l1.font=[UIFont fontWithName:#"AppleGothic" size:17];
l1.textColor=[UIColor blackColor];
l1.backgroundColor=[UIColor clearColor];
l1.numberOfLines=3;
[cell.contentView addSubview:l1];
[l1 release];
mp=[[UIButton alloc] initWithFrame:CGRectMake(250, 25, 50, 20)];
mp.tag=2;
mp.font=[UIFont boldSystemFontOfSize:14];
mp.textColor=[UIColor blueColor ];
[mp addTarget:self action:#selector(mapbtnpressed:) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:mp];
[mp release]
return cell;
}
in a cellForRowAtIndexPath method u call
cell=[self getCellContentView:CellIdentifier];
labelname=(UILabel *)[cell viewWithTag:1];
[cell.contentView addSubview:labelname];
click event
+
labelname.text=[NSString stringWithFormat:#"%d",[lanename.text intvalue]+1];
-event
labelname.text=[NSString stringWithFormat:#"%d",[lanename.text intvalue]-1];
Look at this page of documentation. Especially, Listing 5-3. The basic idea is that all custom subviews should be added to contentView of your table cell.
Try using setText: method of UILabel
[urLabel setText:newText];
- (IBAction)plusButtonPressed
{
int value = [urLabel.text intValue];
value++;
[urLabel setText:[NSString stringWithFormat:#"%d",value]];
}