@H_403_6@
我正在尝试在我的应用程序中播放音乐.音乐工作正常,但在切换viewControllers并返回主菜单后,我的音乐再次播放！这意味着几个相同的声音一起播放！我怎么解决这个问题？这是我的代码：
- (void)viewDidLoad {
NSString *music = [[NSBundle mainBundle] pathForResource:@"1music" ofType:@"mp3"];
myMusic = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:music] error:NULL];
myMusic.delegate = self;
myMusic.numberOfLoops = -1;
[myMusic play];
}
- (IBAction) scoreView {
scoreViewController *scoreView = [[scoreViewController alloc] initWithNibName:@"scoreViewController" bundle:nil];
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:1];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.view cache:YES];
[self.view addSubview: scoreView.view];
[UIView commitAnimations];
}
编辑代码：
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
NSString * musicSonati = [[NSBundle mainBundle] pathForResource:@"music" ofType:@"mp3"];
myMusic = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:musicSonati] error:NULL];
myMusic.delegate = self;
myMusic.numberOfLoops = -1;
[myMusic play];
}
return self;
}
//toggle button
- (IBAction)MusicPlaying:(id)sender {
if ((isPlay = !isPlay))
{
UIImage *buttonImageNormal = [UIImage imageNamed:@"play.png"];
UIImage *stretchableButtonImageNormal = [buttonImageNormal stretchableImageWithLeftCapWidth:0 topCapHeight:0];
[MusicButton setBackgroundImage:stretchableButtonImageNormal forState:UIControlStateNormal];
[myMusic pause];
}else {
UIImage *buttonImageNormal = [UIImage imageNamed:@"pause.png"];
UIImage *stretchableButtonImageNormal = [buttonImageNormal stretchableImageWithLeftCapWidth:0 topCapHeight:0];
[MusicButton setBackgroundImage:stretchableButtonImageNormal forState:UIControlStateNormal];
NSLog(@"Music play");
[myMusic play];
}
}
解决方法
确保myMusic被正确声明为保留属性并合成然后尝试这样的事情：
-(void) commonInit {
NSString * musicSonati = [[NSBundle mainBundle] pathForResource:@"music" ofType:@"mp3"];
self.myMusic = [[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:musicSonati] error:NULL] autorelease];
self.myMusic.delegate = self;
self.myMusic.numberOfLoops = -1;
//You probably don't want to play music on init,rather defer to viewDidLoad.
// [self.myMusic play];
}
- (id)initWithCoder:(NSCoder *)coder {
self = [super initWithCoder:coder];
if (self) {
[self commonInit];
}
return self;
}
- (id)init {
self = [super init];
if (self) {
[self commonInit];
}
return self;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
[self commonInit];
}
return self;
}
然后在viewDidLoad中尝试：
- (void)viewDidLoad {
...
if (!self.myMusic.playing) {
[self.myMusic play];
}
...
}
另外,不要忘记以dealloc发布你的播放器！