播放声音单击

Question

我面临一个很奇怪的问题，我的要求是发挥按钮单击声音，这是我的代码：

- (void)viewDidLoad 
{ 
    [super viewDidLoad];  
    NSString *path=[[NSBundle mainBundle] pathForResource:@"button-3" ofType:@"mp3"]; 
    tapSound=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL]]; 
    [tapSound prepareToPlay]; 
    tapSound.delegate=self; 

    //creating the button in view did load and button is declared in .h 
    btn=[UIButton buttonWithType:UIButtonTypeCustom]; 
    btn.frame=CGRectMake(x, y, 58,58); 
    [btn addTarget:self action:@selector(btnClkd:) forControlEvents:UIControlEventTouchUpInside]; 
    [self.view addSubview:btn]; 
} 

//click method 
-(void)btnClkd:(UIButton*)sender 
{ 
[tapSound play]; 
} 

但是当我运行的代码，然后点击按钮我的应用程序得到坠毁，得到这个错误：“终止应用程序由于未捕获的异常‘NSInvalidArgumentException’，原因是：‘ - [UIButton的发挥]：无法识别的选择发送到实例0x758c790’”

但是如果我播放声音的任何地方否则，但不是在按钮的点击，然后它没有任何问题发挥。我不知道为什么会发生这种情况？请帮我

Answer 1

这样做：

-(void)btnClkd:(UIButton*)sender 
{ 
    NSString *path=[[NSBundle mainBundle] pathForResource:@"button-3" ofType:@"mp3"]; 
    tapSound = nil; 
    tapSound=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL]]; 
    [tapSound prepareToPlay]; 
    tapSound.delegate=self; 
    [tapSound play]; 
} 

Answer 2

试试这一个。添加在你的.h文件中

.h file 



     #import <AVFoundation/AVFoundation.h> 
      #import <AudioUnit/AudioUnit.h> 


     AVAudioPlayer *player1; 

     @property(nonatomic ,retain)AVAudioPlayer *player1; 

in your .m file 




@synthesize player1; 



    - (void)viewDidLoad 
     { 
      [super viewDidLoad];  

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];  
      NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"button-3" ofType:@"mp3"];  
      NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:soundFilePath];  
      AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil];  
      [fileURL release]; 
      self.player1 = audioPlayer;  
      [audioPlayer release]; 
      [self.player1 prepareToPlay]; 
      [self.player1 setDelegate:self]; 
      [pool release]; 

      //creating the button in view did load and button is declared in .h 
      btn=[UIButton buttonWithType:UIButtonTypeCustom]; 
      btn.frame=CGRectMake(x, y, 58,58); 
      [btn addTarget:self action:@selector(btnClkd:) forControlEvents:UIControlEventTouchUpInside]; 
      [self.view addSubview:btn]; 
     } 




    -(void)btnClkd:(UIButton*)sender {    

      [self.player1 play]; 

    }