oOOMIAO
oOOMIAO
采纳率66%
2012-11-07 09:10

如何从 AVAudioPlayer中获取duration 持续时间 (HH:MM:SS)

已采纳

在iPhone应用里用到AVAudioPlayer播放音频文件。然后从AVAudioPlayer 中获取持续时间

我获得的duration值是这样的:252.765442。

但是我想要的是这种格式: HH/MM/SS 02:52:76

如何转换?请帮忙

我写出来的代码没有用:

audioPlayer =  [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:tempFilePath] error:&err];
    [audioPlayer setDelegate:self];
    [audioPlayer prepareToPlay];

    float duration = (float)audioPlayer.duration;
    NSLog(@"duration:%f",duration);
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1条回答

  • vikeyToy vikeyToy 9年前

    试试看:

    NSTimeInterval theTimeInterval = audioPlayer.duration;
     // 获取system calendar
    NSCalendar *sysCalendar = [NSCalendar currentCalendar];
    
    // 创建NSDates
    NSDate *date1 = [[NSDate alloc] init];
    NSDate *date2 = [[NSDate alloc] initWithTimeInterval:theTimeInterval sinceDate:date1];
    // 转换到小时、分钟
    unsigned int unitFlags = NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
    NSDateComponents *breakdownInfo = [sysCalendar components:unitFlags fromDate:date1  toDate:date2  options:0];
    NSLog(@"Duration: HH/MM/SS %d:%d:%d", [breakdownInfo hour], [breakdownInfo minute], [breakdownInfo second]);
    [date1 release];
    [date2 release];
    
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