Ios 暂停计时器/秒表

在项目中，我的工作，我需要有一个秒表，将暂停和继续。到目前为止，所有的基本功能都能正常工作，但我还没有找到暂停计时器并重新启动它的方法。仅供参考，我已经检查了其他帖子，但它们不起作用。代码：

.h:

---

在您的情况下，您正在使用记录按钮最初按下的

NSDate

计算秒表标签的值。无法以这种方式暂停计时器，因为每次重新计算秒表标签的值时，它都会反映按下记录按钮的原始日期。我建议将此方法更改为以下内容：

 - (void)updateTimer
 {
     // Timer is 1/10 of a second so thats what we add to stopwatch
     NSTimeInterval timeInterval = 0.1;

    // Create a date formatter
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"HH:mm:ss.SSS"];
    [dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0.0]];

    // Take the time currently displayed on the stopwatch and add the time interval to it
    NSDate *oldDate = [dateFormatter dateFromString:self.stopwatchLabel.text];
    NSDate *newDate = [oldDate dateByAddingTimeInterval:timeInterval];
    //Get a string representation of the new date and BOOM POW.
    NSString *timeString = [dateFormatter stringFromDate:newDate];
    self.stopwatchLabel.text = timeString;
 }

---

我还没有测试过这个，但我希望它能工作。如果还有一些语法问题，我也不会感到惊讶。另外，请确保

self.stopwatchLabel.text中的字符串符合开始格式（例如00:00:00.000）。
尝试在
-（void）AudioPlayerDifinishPlaying:（AVAudioPlayer*）player中注释代码

我的猜测是，在
-（iAction）RecordPauseTaped:（id）sender
中，您正在调用
[player stop]
，这将触发
-（void）AudioPlayerDifinishPlaying:（AVAudioPlayer*）player成功：（BOOL）标志
，使您的新计时器无效。
当我现在单击暂停计时器时，它仍会继续运行。现在它不像以前那样启动计时器了。我把[自动秒表计时器失效]；self.stopWatchTimer=nil；[自更新程序]；在暂停录制注释下。您可以有多个计时器吗？使计时器无效应该会使其停止。然后要恢复计时，你应该制作一个新的计时器。我在哪里恢复秒表？如果（！recorder.recording）{“相关”部分显示的几个结果具体出了什么问题？不要只说“它们不工作”，否则我会将你的问题标记为重复。
- (IBAction)recordPauseTapped:(id)sender {

     if ([stopwatchLabel.text  isEqual: @"00:00:00.000"]) {


     self.startDate = [NSDate date];

     // Create the stop watch timer that fires every 100 ms
     self.stopWatchTimer = [NSTimer scheduledTimerWithTimeInterval:1.0/10.0
                                                       target:self
                                                     selector:@selector(updateTimer)
                                                     userInfo:nil
                                                      repeats:YES];



     // Stop the audio player before recording
     if (player.playing) {
     [player stop];
    }

if (!recorder.recording) {
    AVAudioSession *session = [AVAudioSession sharedInstance];
    [session setActive:YES error:nil];

    // Start recording
    [recorder record];
    [recordPauseButton setTitle:@"Pause" forState:UIControlStateNormal];

}
}else {

    // Pause recording
    [self.stopWatchTimer invalidate];
    self.stopWatchTimer = nil;
    [self updateTimer];
    [recorder pause];
    [recordPauseButton setTitle:@"Record" forState:UIControlStateNormal];

}

[stopButton setEnabled:YES];
[playButton setEnabled:NO];


}

 - (void)updateTimer
 {
     // Timer is 1/10 of a second so thats what we add to stopwatch
     NSTimeInterval timeInterval = 0.1;

    // Create a date formatter
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"HH:mm:ss.SSS"];
    [dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0.0]];

    // Take the time currently displayed on the stopwatch and add the time interval to it
    NSDate *oldDate = [dateFormatter dateFromString:self.stopwatchLabel.text];
    NSDate *newDate = [oldDate dateByAddingTimeInterval:timeInterval];
    //Get a string representation of the new date and BOOM POW.
    NSString *timeString = [dateFormatter stringFromDate:newDate];
    self.stopwatchLabel.text = timeString;
 }

- (IBAction)recordPauseTapped:(id)sender {

     if ([stopwatchLabel.text  isEqual: @"00:00:00.000"]) {


     self.startDate = [NSDate date];

     // Create the stop watch timer that fires every 100 ms
     self.stopWatchTimer = [NSTimer scheduledTimerWithTimeInterval:1.0/10.0
                                                       target:self
                                                     selector:@selector(updateTimer)
                                                     userInfo:nil
                                                      repeats:YES];



     // Stop the audio player before recording
     if (player.playing) {
     [player stop];
    }

if (!recorder.recording) {
    AVAudioSession *session = [AVAudioSession sharedInstance];
    [session setActive:YES error:nil];

    // Start recording
    [recorder record];
    [recordPauseButton setTitle:@"Pause" forState:UIControlStateNormal];

}
}else {

    // Pause recording
    [self.stopWatchTimer invalidate];
    self.stopWatchTimer = nil;
    [self updateTimer];
    [recorder pause];
    [recordPauseButton setTitle:@"Record" forState:UIControlStateNormal];

}

[stopButton setEnabled:YES];
[playButton setEnabled:NO];


}