iPhone - Set Button back to initial state - iphone

Question

I created a button using a play and stop image, what I want is when i press play and that the sound finishes, the stop image should go back to play, but it's not working, can anyone help here please. cheers.
- (IBAction)play {
if(clicked == 0){
clicked = 1;
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:#"%#/TEST.wav", [[NSBundle mainBundle] resourcePath]]];
NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
audioPlayer.numberOfLoops = 0;
[audioPlayer play];
[start setImage:[UIImage imageNamed:#"stop.png"] forState:UIControlStateNormal];
}
else{
[audioPlayer release];
clicked = 0;
[start setImage:[UIImage imageNamed:#"pla.png"] forState:UIControlStateNormal];
}
}
//If user does not do anything by the end of the sound set the button to start
- (void) audioPlayerDidFinishPlaying: (AVAudioPlayer *) player
successfully: (BOOL) flag {
if (flag==YES) {
[start setImage:[UIImage imageNamed:#"pla.png"] forState:UIControlStateNormal];
}
}
This is my .h file
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
int clicked;
#interface _0_RabbanasViewController : UIViewController {
IBOutlet UIScrollView *scroll;
AVAudioPlayer *audioPlayer;
IBOutlet UIButton *start;
IBOutlet UIImage *iPla;
IBOutlet UIImage *iStop;
BOOL successfully;
}
- (IBAction)play;
- (IBAction)next;
#end

Answer 1

Make sure you set the delegate of the AVAudioPlayer instance to self:
[audioPlayer setDelegate:self];
and in the header file, subscribe to the AVAudioPlayerDelegate protocol:
<AVAudioPlayerDelegate>
Now it should work.
EDIT: Here's where to subscribe to the AVAudioPlayerDelegate protocol:
#interface _0_RabbanasViewController : UIViewController <AVAudioPlayerDelegate> {
IBOutlet UIScrollView *scroll;
AVAudioPlayer *audioPlayer;
IBOutlet UIButton *start;
...
Hope it works now. :)
EDIT2: Set audioPlayer delegate to self here:
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
audioPlayer.numberOfLoops = 0;
[audioPlayer setDelegate:self];
[audioPlayer play];
EDIT3: Add this:
- (void) audioPlayerDidFinishPlaying: (AVAudioPlayer *) player
successfully: (BOOL) flag {
if (flag==YES) {
clicked = 0;
[start setImage:[UIImage imageNamed:#"pla.png"] forState:UIControlStateNormal];
}
}