Making an UILabel appear in another view once pressed in one view

I have 2 views

• SoundViewController
• ShowViewController

The sound view has a sound on it (IBAction).

- (IBAction)oneSound:(id)sender; {
    if (oneAudio && oneAudio.playing) {
        [oneAudio stop];
        [oneAudio release];
        oneAudio = nil;
        return;
    }    
    NSString *path = [[NSBundle mainBundle] pathForResource:@"1k" ofType:@"mp3"];
    if (oneAudio) [oneAudio release];
    NSError *error = nil;
    oneAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:&error];
    if (error)
        NSLog(@"%@",[error localizedDescription]);
    oneAudio.delegate = self;
    [oneAudio play];    

mainText.text =@"t开发者_StackOverflow中文版est";

}

And the ShowViewController needs to display the uilabel thats been pressed from the sound button

I want it so once the user has pressed the sound on SoundViewController, the uilabel appear on the showviewcontroller as it appear on the soundviewcontroller at the moment

Well, you can do this by

1. retain the UILabel
2. remove it from it's superview
3. add it to the other view
4. release it

You'll need access to the ShowViewController from the SoundViewController. So you'll have to define a connection between the two views (via IBOutlet or retained property, most likely).

I'm not sure what variable in the above code is your UILabel, so replace 'sender' with the correct ivar (mainLabel, maybe?):

[sender retain];
[sender removeFromSuperview];
[showViewController.view addSubview:sender];
[sender release];

Edit:

To clarify, the variable in the above code "sender" is the object that triggered this method. Whatever you have connected to the IBAction in the nib. In this case it would probably be a UIButton. You probably have to add an IBOutlet for your UILabel, and attach it to the correct UILabel in your nib file and use that IBOutlet in place of "sender".

You should probably read up on view hierarchy and view controllers. What you're trying to do is remarkably easy, and there are about a dozen ways to make it happen, but you have to understand how to structure your app correctly first. The most obvious issue is that the two view controllers need to have a reference to each-other in order to pass views back and forth. I can't send a view to another view if I don't know where that other view is. The views can be connected in IB, in code when they are created, etc.

view is a property of UIViewController. Assuming your ShowViewController is a subclass of UIViewController, it will have a view property. Perhaps your showViewController ivar isn't correctly typed? (if the type is id for example, it will give a warning when you try to access it's view property).