一旦的NSTimer停止解僱我的目標C視圖控制器

Question

我使用NSTimer，

timer = [NSTimer scheduledTimerWithTimeInterval: 1.0 target:self selector:@selector(updateCountdown) userInfo:nil repeats: YES]; 

然後我60秒倒計時程序

-(void) updateCountdown { 
    int hours, minutes, seconds; 

    secondsLeft++; 
    hours = secondsLeft/3600; 
    minutes = (secondsLeft % 3600)/60; 
    seconds = (secondsLeft %3600) % 60; 


    time.text = [NSString stringWithFormat:@"%02d", seconds]; 

} 

我的問題是後60秒解僱我倒計時查看控制器頁面..任何人都可以幫助我

Answer 1

如果repeats: YES];檢查像你的seconds達到或大於60，無效的定時器或解散你的VC

if (seconds >60) 
{ 
[timer invalidate]; 
[self dismissViewControllerAnimated:YES completion:nil]; 
} 

別人打電話給你的計時器使用一次repeats: NO];

timer = [NSTimer scheduledTimerWithTimeInterval: 1.0 target:self selector:@selector(updateCountdown) userInfo:nil repeats: NO]; 

，並呼籲像

-(void) updateCountdown { 
    [timer invalidate]; 
    [self dismissViewControllerAnimated:YES completion:nil]; 

} 

Answer 2

timer = [NSTimer scheduledTimerWithTimeInterval: 1.0 target:self selector:@selector(updateCountdown:) userInfo:nil repeats: NO]; // set No 

-(void) updateCountdown:(NSTimer *)timer 
{ 
    [timer invalidate]; 
    // dismiss your controller 
}