adding a UILabel as subview of UIButton doesn't trigger button action - iphone

I have a UIButton and I am adding a subview to the UIButton which is a UILabel. When I tap on the UILabel the action of the button doesn't get triggered. Is there an easy fix so that the touch event gets passed to the UIButton when the UILabel is tapped?
I am thinking of adding a gesture recognizer to the UILabel which then triggers the action of the UIButton, not sure if there's a much more simpler way.

You can probably just disable user interaction to your label.
_yourLabel.userInteractionEnabled = NO;

try this,
- (void)viewDidLoad
{
[super viewDidLoad];
UIButton *firstButton=[UIButton buttonWithType:UIButtonTypeRoundedRect];
[firstButton setTitle:#"first" forState:UIControlStateNormal];
firstButton.frame=CGRectMake(40, 70, 80, 80);
[firstButton addTarget:self action:#selector(firstButtonClicked) forControlEvents: UIControlEventTouchUpInside];
[self.view addSubview:firstButton];
UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(0, 0, 80, 80)];
label.text=#"hai";
label.backgroundColor=[UIColor redColor];
[firstButton addSubview:label];
}
-(void)firstButtonClicked {
NSLog(#"first");
}

Related

UIButton not responding when it overlaps another UIButton

I have a UIViewController called MyViewController. MyViewController's view has an UIButton called MyFirstButton as a subview. Then MyViewController's view adds another subview called MySubView. MySubView is placed directly over MyFirstButton, so MyFirstButton isn't seen. MySubView in its turn has an UIButton called MySecondButton as a subview.
The issue is - if MySecondButton's frame overlaps MyFirstButton's frame, then MySecondButton doesn't respond.
I tried to fix it by setting userInteractionEnabled to NO for MyViewController's view and YES for MySubView, but it didn't help. The button still not responding. How do i enable a button which is located over another?
You cant use the action for that particular MyFirstButton which is under MySecondButton... I dnt think this can be done .. what you can actually do is hide MySecondButton on its click to reveal the MYFirstButton and then on the MYFirstButton click have its action performed and reveal the MYSecondButton again on top of the first one :) likewise play hidden with the subviews 2...
try this,
- (void)viewDidLoad
{
[super viewDidLoad];
UIButton *firstButton=[UIButton buttonWithType:UIButtonTypeRoundedRect];
[firstButton setTitle:#"first" forState:UIControlStateNormal];
firstButton.frame=CGRectMake(40, 70, 80, 80);
[firstButton addTarget:self action:#selector(firstButtonClicked) forControlEvents: UIControlEventTouchUpInside];
[self.view addSubview:firstButton];
UIView *view=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 80, 80)];
[firstButton addSubview:view];
UIButton *secondButton=[UIButton buttonWithType:UIButtonTypeRoundedRect];
[secondButton setTitle:#"second" forState:UIControlStateNormal];
secondButton.frame=CGRectMake(0, 0, 80, 80);
[secondButton addTarget:self action:#selector(secondButtonClicked) forControlEvents: UIControlEventTouchUpInside];
[view addSubview:secondButton];
// Do any additional setup after loading the view, typically from a nib.
}
-(void)firstButtonClicked {
NSLog(#"first");
}
-(void)secondButtonClicked {
NSLog(#"second");
}

Adding Custom UIButton To subView

I have subview which it initiated by touch on the UIbutton in the main view.
Once the subview pops up it displays a label with the info I provided. This all works. I just need an UIbutton to show up so I can then set it up to dismiss the subview and go back to the main view. i have searched all over and have found nothing that helps.
Here is what my code in my .m file looks like:
////Button that Displays Subview with Its Label and Button
- (IBAction)showInfo:(id)sender
/////UI Subview
{UIView *mySubview = [[UIView alloc] initWithFrame:CGRectMake(0, 0,320, 480)];
[self.view addSubview:mySubview];
mySubview.backgroundColor = [UIColor blackColor];
mySubview.alpha = .7f;
//////Label in SubView
{UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 300, 50)];
label.text = #"Here is info";
label.textColor = [UIColor whiteColor];
label.backgroundColor= [UIColor clearColor];
[self.view addSubview:label];
////Button in Subview
//create the button
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:#"button-info-x.png"] forState:UIControlStateNormal];
//set the position of the button
button.frame = CGRectMake(120, 252, 68, 68);
//add the button to the view
[self.view addSubview:button];
Now I just need to add an action to the UIButton to dismiss the Subview?
First Take IBOutlet of subView and add it to the main View.
IBOutlet UIView *subView;
Then, add UIButton to the SubView like this:
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
//set the position of the button
button.frame = CGRectMake(0, 0, 100, 30);
//set the button's title
[button setTitle:#"Click Me!" forState:UIControlStateNormal];
[btnMenu addTarget:self action:#selector(your MethodName:) forControlEvents:UIControlEventTouchUpInside];
//add the button to the view
[subView addSubview:button];
Then,
-(IBAction)your MethodName:(id)sender {
}
In Above Method Remove SubView from Main View.
If you're simply looking to set an image for a UIButton instead of a title, you're looking for the - (void)setImage:(UIImage *)image forState:(UIControlState)statemethod.
You should check the UIButton reference for more info.
Add Target to the custom button
{
.....
[button addTarget:self action:#selector(your dismiss:) forControlEvents:UIControlEventTouchUpInside];
.......
}
-(IBAction)your dismiss:(id)sender
{
// write the dismissal code here
}

iPhone-MPMediaPlayer disable seek forward button

I would like to remove or disable the seek forward button from the MPMediaPlayer.
I have tried to enumerate all the views but apparently I could not find this button.
Does anyone have any idea?
Thanks.
You could always provide a custom control panel, you can hide the default controls with
playerController.controlStyle = MPMovieControlStyleNone;
Then add a subview containing your interface and just link buttons to play/pause start/stop rewinding, and there's an open source implementation of the variable speed slider (OBSlider). You will also need to register for some MP notifications:
MPMovieDurationAvailableNotification
MPMoviePlayerLoadStateDidChangeNotification
MPMoviePlayerPlaybackDidFinishNotification
MPMoviePlayerPlaybackStateDidChangeNotification
The only way I found is to add a transparent button over the seek forward button.
Here is the code:
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
UIButton *button = [[UIButton alloc] init];
if(UIInterfaceOrientationIsLandscape(self.interfaceOrientation))
[button setFrame:CGRectMake(535, 599, 90, 60)];
else
[button setFrame:CGRectMake(407, 855, 90, 60)];
[button setBackgroundColor:[UIColor clearColor]];
[button setAlpha:0.7];
[button setTag:1200];
[self.moviePlayer.view addSubview:button];
[button release];
}
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
if(UIInterfaceOrientationIsLandscape(toInterfaceOrientation))
{
UIButton *button = (UIButton *)[self.moviePlayer.view viewWithTag:1200];
[button setFrame:CGRectMake(535, 599, 90, 60)];
}
else
{
UIButton *button = (UIButton *)[self.moviePlayer.view viewWithTag:1200];
[button setFrame:CGRectMake(407, 855, 90, 60)];
}
}
This is for IPAD ONLY! If you would like to do the same on iPhone, please change the position of the transparent button.

iOS - Dynamic Buttons

I'm trying to use dynamic buttons created via code (no IB) in my project and they appear where and how I want them but they don't fire their actions.
UIButton *button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button1.frame = CGRectMake(475, 302, 49, 58);
[button1 setTitle:#"1"
forState:(UIControlState)UIControlStateNormal];
[button1 addTarget:self
action:#selector(goToFirstTrailer)
forControlEvents:(UIControlEvents)UIControlEventTouchDown];
[myImageView addSubview:button1];
-(void)goToFirstTrailer {
[self startAnimator:#"OutsideToTrailer1_" forNumFrames:60];
}
The imageView this is placed on has buttons and User Interaction Enabled On.
Any light you can shed would be much appreciated.
I think you have the wrong signature of the action method change that line to
-(void) goToFirstTrailer:(id)sender {
and where you set the action to
[button1 addTarget:self action:#selector(goToFirstTrailer:) forControlEvents:....
Important is the colon after the message name because I changed the action method signature to include the sender.
Edit I wrote a small sample project with just an imageView in the MainWindow.xib and created a button programmatically as follows
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
UIButton *button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button1.frame = CGRectMake(0.f, 0.f, 50.f, 50.f);
[button1 setTitle:#"1"
forState:(UIControlState)UIControlStateNormal];
[button1 addTarget:self
action:#selector(goToFirstTrailer:)
forControlEvents:(UIControlEvents)UIControlEventTouchDown];
imageView.userInteractionEnabled = YES; // <--- this has to be set to YES
[imageView addSubview:button1];
[self.window makeKeyAndVisible];
return YES;
}
It is quick and dirty and yes, I am misusing the application delegate as the view controller. I know it is bad.
Here is the action method
- (void) goToFirstTrailer:(id)sender {
imageView.backgroundColor = [UIColor redColor];
}
Setting the userInteractionEnabled property on the parent imageView makes the difference. With it set to NO which is the default, no events are routed to the button.
If myImageView is a UIImageView object, adding a subview to it (like UIButton) only displays the image that object is represented by. If you add that UIButton as a subview of a UIView, it should work perfectly. Try adding an auxiliary UIView to your UIImageView and then add your button to a subview of the new auxiliary UIView, that should solve your problem.
This works fine for me. Note that I changed the event to UIControlEventTouchUpInside to allow the button press down state to be visible first.
UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn.frame = CGRectMake(20,400,88,35); //The position and size of the button (x,y,width,height)
[btn setTitle:#"Quit" forState:UIControlStateNormal];
[btn addTarget:self
action:#selector(showAbout)
forControlEvents:(UIControlEvents)UIControlEventTouchUpInside];
[self.view addSubview:btn];

UIButton's addtarget: not called after touch it!

I have the following code, and when i press the UIButton, nothing is called, and it doesn't crash.
calloutButton = [[UIView alloc] initWithFrame:CGRectMake(left_width2*2-3, 5, 230, 230)];
UIButton *buttongo= [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
buttongo.frame=CGRectMake(0, -1, 25, 25);
[buttongo addTarget:self action:#selector(buttonEvent:) forControlEvents:UIControlEventTouchUpInside];
[calloutButton addSubview:buttongo];
[label addSubview:calloutButton];
-(IBAction)buttonEvent:(id)sender
{
NSLog(#"Hello...");
}
Someone Knows why?
Thanks!
Check the size of the label, it can be CGSizeZero, but because the clipping of subviews is NO by default so the button is visible, but it isn't touchable.
Make sure you not have
#property IBOutlet UIButton *yourButton;
with same name with
#implementation {
UIButton *_yourButton;
}
I had such problem