Avaudioplayer 通过在UISlider中选择点来修剪音频文件

我正在制作一个音频播放器，在那里我需要显示正在播放的音频的进度。我还需要通过选择我标记的点来修剪音频

谢谢

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文凯特什瓦兰

我终于找到了解决办法

enter code here 

    UISlider *sliderProgress = [[UISlider alloc] initWithFrame:CGRectMake(135, 165, 260, 28)];
    sliderProgress.maximumValue = self.player.duration;
    [sliderProgress addTarget:self action:@selector(sliderChanged:) forControlEvents:UIControlEventValueChanged];
    [self setProgressSlider:sliderProgress];
    [self addSubview:progressSlider];
    [sliderProgress release];

    _leftThumbView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 56, 35)];
    _leftThumbView.image = [UIImage imageNamed:@"top.png"];
    _leftThumbView.contentMode = UIViewContentModeLeft;
    _leftThumbView.userInteractionEnabled = YES;
    _leftThumbView.clipsToBounds = YES;
    [progressSlider addSubview:_leftThumbView];

    UIPanGestureRecognizer *leftPan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleLeftPan:)];
    [_leftThumbView addGestureRecognizer:leftPan];

    _rightThumbView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 56, 35)];
    _rightThumbView.image = [UIImage imageNamed:@"bottom.png"];
    _rightThumbView.contentMode = UIViewContentModeRight;
    _rightThumbView.userInteractionEnabled = YES;
    _rightThumbView.clipsToBounds = YES;
    [progressSlider addSubview:_rightThumbView];

    UIPanGestureRecognizer *rightPan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleRightPan:)];
    [_rightThumbView addGestureRecognizer:rightPan];

      - (void)handleLeftPan:(UIPanGestureRecognizer *)gesture
    {
        if (gesture.state == UIGestureRecognizerStateBegan || gesture.state == UIGestureRecognizerStateChanged) {
          CGPoint translation = [gesture translationInView:self];
          CGFloat range = progressSlider.maximumValue - progressSlider.minimumValue;
    CGFloat availableWidth = 260 - 28;
    _leftValue += translation.x / availableWidth * range;
    if (_leftValue < 0) _leftValue = progressSlider.minimumValue;
    if (_rightValue - _leftValue < progressSlider.minimumValue) _leftValue = _rightValue - 1.0;

    [gesture setTranslation:CGPointZero inView:self];

    [self setNeedsLayout];



}

//if (gesture.state == UIGestureRecognizerStateEnded)
    //[self hidePopover:_leftPopover];

在此处输入代码
UISlider*sliderProgress=[[UISlider alloc]initWithFrame:CGRectMake（135、165、260、28）]；
sliderProgress.maximumValue=self.player.duration；
[sliderProgress addTarget:自我操作：@选择器（sliderChanged:）用于控制事件：UIControlEventValueChanged]；
[自我设置进度滑块：滑块进度]；
[自添加子视图：progressSlider]；
[滑块程序释放]；
_leftThumbView=[[UIImageView alloc]initWithFrame:CGRectMake（0,0,56,35）]；
_leftThumbView.image=[UIImage ImageName:@“top.png”]；
_leftThumbView.contentMode=UIViewContentModeLeft；
_leftThumbView.userInteractionEnabled=是；
_leftThumbView.clipsToBounds=是；
[progressSlider addSubview:_leftThumbView]；
UIPanGestureRecognizer*leftPan=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector（handleLeftPan:）]；
[_LeftThumbViewAddGestureRecognitor:leftPan]；
_rightThumbView=[[UIImageView alloc]initWithFrame:CGRectMake（0,0,56,35）]；
_rightThumbView.image=[UIImage ImageName:@“bottom.png”]；
_rightThumbView.contentMode=UIViewContentModerRight；
_rightThumbView.userInteractionEnabled=是；
_rightThumbView.clipsToBounds=是；
[progressSlider addSubview:_rightThumbView]；
UIPanGestureRecognizer*rightPan=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector（HandlerRightPan:）]；
[_RightThumbViewAddGestureRecognitor:rightPan]；
-（无效）Handleftpan:（UIPangestureRecognitor*）手势
{
if（sirpose.state==UIGestureRecognizerStateStarted | | sirpose.state==UIGestureRecognizerStateChanged）{
CGPoint translation=[手势翻译视图：self]；
CGFloat范围=progressSlider.maximumValue-progressSlider.minimumValue；
CGFloat可用宽度=260-28；
_leftValue+=translation.x/可用宽度*范围；
如果（_leftValue<0）_leftValue=progressSlider.minimumValue；
如果（_rightValue-_leftValue

}

-（void）HandlerRightPan:（UIPangestureRecognitor*）手势
{
if（sirpose.state==UIGestureRecognizerStateStarted | | sirpose.state==UIGestureRecognizerStateChanged）{
CGPoint translation=[手势翻译视图：self]；
CGFloat范围=progressSlider.maximumValue-progressSlider.minimumValue；
CGFloat可用宽度=260-28；
_rightValue+=translation.x/可用宽度*范围；
如果（_rightValue>progressSlider.maximumValue）_rightValue=progressSlider.maximumValue；
如果（_rightValue-_leftValue

}

       - (void)handleRightPan:(UIPanGestureRecognizer *)gesture
    {
         if (gesture.state == UIGestureRecognizerStateBegan || gesture.state == UIGestureRecognizerStateChanged) {
        CGPoint translation = [gesture translationInView:self];
    CGFloat range = progressSlider.maximumValue - progressSlider.minimumValue;
    CGFloat availableWidth = 260 - 28;
    _rightValue += translation.x / availableWidth * range;

    if (_rightValue > progressSlider.maximumValue) _rightValue = progressSlider.maximumValue;
    if (_rightValue - _leftValue < progressSlider.minimumValue) _rightValue = _leftValue + 1.0;

    [gesture setTranslation:CGPointZero inView:self];

    [self setNeedsLayout];