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ios - iOS NSTimer触发两次

转载 作者:行者123 更新时间:2023-12-01 17:10:10 25 4
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嗨,我正在尝试使用NSTimer创建一个倒计时,并使用标签进行查看。问题是标签下降了两位,我也不知道为什么。有任何想法吗?

这是我的代码

   - (void)viewDidLoad
{
NSLog(@"%@", self.chosenTime);
[self startGame];
[super viewDidLoad];

NSString *timeString = self.chosenTime;
self.timer = [timeString intValue];
self.countdown.text = timeString;
// Do any additional setup after loading the view.
}

- (void)startGame
{
[self introCountdown];
[self performSelector:@selector(goAnimation) withObject:nil afterDelay:3.0];
NSString *timeString = self.chosenTime;
self.timer = [timeString intValue];
[self performSelector:@selector(startCountdown) withObject:nil afterDelay:4.0];
}

- (void)startCountdown
{
//self.countdownTimer = [NSTimer timerWithTimeInterval:1 target:self selector:@selector(decrementTimer:) userInfo:nil repeats:YES];
self.countdownTimer = [NSTimer scheduledTimerWithTimeInterval:1.00 target:self selector:@selector(decrementTimer:) userInfo:nil repeats:YES];
}

- (void)decrementTimer:(NSTimer *)timer
{
if(self.timer > 0)
{
self.timer = self.timer - 1;
self.countdown.text = [NSString stringWithFormat:@"%d", self.timer];
}
else
{
[self.countdownTimer invalidate];
self.countdownTimer = nil;
}
}

最佳答案

此代码似乎是正确的。您可能正在其他地方更改标签的文本吗?

关于ios - iOS NSTimer触发两次,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10412155/

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