多種方法：按鈕的目標和選擇器不工作

試圖解決我的Other question。這次嘗試這種方式爲一個按鈕添加了多個方法，但是當點擊按鈕時，它看起來沒有任何東西看起來像這些方法不起作用。多種方法：按鈕的目標和選擇器不工作

//Add Play Button 

UIButton *playpauseButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
[playpauseButton addTarget:self action:@selector(playAction:) forControlEvents:UIControlEventTouchUpInside]; 
[playpauseButton addTarget:self action:@selector(playpauseAction:) forControlEvents:UIControlEventTouchUpInside]; 
playpauseButton.frame = CGRectMake(0, 0, 30, 30); 
[playpauseButton setImage:[UIImage imageNamed:@"Play Icon.png"] forState:UIControlStateNormal]; 
[playpauseButton setImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateSelected]; 
UIBarButtonItem *play = [[UIBarButtonItem alloc] initWithCustomView:playpauseButton]; 


- (void)playAction:(id)sender{ 
[audioPlayer play]; 
self.timer = [NSTimer scheduledTimerWithTimeInterval:11.0 
               target:self 
              selector:@selector(displayviewsAction:) 
              userInfo:nil 
              repeats:NO]; 
} 

-(void)playpauseAction:(id)sender { 
     if ([audioPlayer isPlaying]){ 
      [sender setImage:[UIImage imageNamed:@"Play Icon.png"] forState:UIControlStateSelected]; 
      [audioPlayer pause]; 
      [self pauseTimer]; 
    } else {  
     [sender setImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateNormal]; 
     [audioPlayer play]; 
     [self resumeTimer]; 
     self.timer = [NSTimer scheduledTimerWithTimeInterval:11.0 
             target:self 
             selector:@selector(displayviewsAction:) 
             userInfo:nil 
             repeats:NO]; 
     }   
} 

-(void)pauseTimer{ 
pauseStart = [[NSDate dateWithTimeIntervalSinceNow:0] retain]; 
previousFireDate = [[timer fireDate] retain]; 
[timer setFireDate:[NSDate distantFuture]]; 
} 
-(void)resumeTimer{ 
float pauseTime = -1*[pauseStart timeIntervalSinceNow]; 
[timer setFireDate:[previousFireDate initWithTimeInterval:pauseTime sinceDate:previousFireDate]]; 
[pauseStart release]; 
[previousFireDate release]; 
}

它顯示播放按鈕時，點擊它沒有任何反應。它應播放音頻文件，啓動NSTimer，開始加載視圖並在播放和暫停按鈕之間切換。任何想法是什麼錯誤。

謝謝。

來源

2012-06-15 user1452248

當用戶點擊按鈕時，playAction:調用[audioPlayer play]。緊接着，playpauseAction:評估[audioPlayer isPlaying]到YES並確實[audioPlayer pause]。

來源

2012-06-15 17:37:02 thelaws

不，它不暫停音頻播放器，因爲它應該顯示沒有發生的暫停圖標。 – user1452248

@ user1452248您在if語句的同一分支中爲UIControlStateSelected設置了「Play Icon.png」。 – thelaws

好吧，我已經切換了方法的順序[playpauseButton addTarget：self action：@selector（playpauseAction :) forControlEvents：UIControlEventTouchUpInside]; [playpauseButton addTarget：self action：@selector（playAction :) forControlEvents：UIControlEventTouchUpInside];現在它正在播放音頻文件，在播放暫停按鈕之間切換，但現在暫停按鈕不會切換回播放按鈕，如果再次按下恢復 – user1452248

多種方法：按鈕的目標和選擇器不工作

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