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.
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