Objective-C 帮助 NSTimer 不重复

发布于 2024-10-16 09:37:29 字数 670 浏览 2 评论 0原文

我需要一点帮助，我有一个方法； countDown 是在 iTunes 发送通知时调用的，然后 countDown 方法运行timerHit 方法，该方法获取双减一，然后将值设置为标签，countDown 方法被设置为重复运行timerHit，但似乎没有正在工作。

这是我到目前为止所拥有的，任何帮助将不胜感激。

- (void)countDown {
    [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(timerHit:) userInfo:nil repeats:YES];
}

- (void)timerHit:(NSTimer *)p_timer {
    iTunesApplication *iTunes = [SBApplication applicationWithBundleIdentifier:@"com.apple.iTunes"];

    if ([iTunes isRunning]) {
        double trackDuration = [[iTunes currentTrack] duration];
        trackDuration--;
        [duration setDoubleValue:trackDuration];
    }
}

谢谢，萨米。

原文

i need a little help i have a method; countDown which is called when iTunes sends a notification, the method countDown then runs the method timerHit which gets a double minuses one from it then sets the value to a label, the method countDown is set to repeatedly run timerHit, however it doesn't seem to be working.

Here's what i have so far, any help would be much appreciated.

- (void)countDown {
    [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(timerHit:) userInfo:nil repeats:YES];
}

- (void)timerHit:(NSTimer *)p_timer {
    iTunesApplication *iTunes = [SBApplication applicationWithBundleIdentifier:@"com.apple.iTunes"];

    if ([iTunes isRunning]) {
        double trackDuration = [[iTunes currentTrack] duration];
        trackDuration--;
        [duration setDoubleValue:trackDuration];
    }
}

Thanks, Sami.

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

小帐篷 2024-10-23 09:37:29

如果计时器位于线程上，那么您应该在活动运行循环上运行它，如下所示：

NSRunLoop *mLoop = [NSRunLoop currentRunLoop];

[NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(timerHit:) userInfo:nil repeats:YES];

mRunLoop = YES;
while (mRunLoop && [mLoop runMode:NSDefaultRunLoopMode beforeDate:[NSDate dateWithTimeIntervalSinceNow:0.01]]);

If the timer is on a thread then you should run it on a active run loop like so:

NSRunLoop *mLoop = [NSRunLoop currentRunLoop];

[NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(timerHit:) userInfo:nil repeats:YES];

mRunLoop = YES;
while (mRunLoop && [mLoop runMode:NSDefaultRunLoopMode beforeDate:[NSDate dateWithTimeIntervalSinceNow:0.01]]);

回复收藏 0 原文

~没有更多了~