UISlider

    _videoSlider = [[UISlider alloc] initWithFrame:

                    CGRectMake(10, 0, 200, 31)];

    [_videoSlider addTarget:self action:@selector(videoSlierChangeValue:)

           forControlEvents:UIControlEventValueChanged];

    [_videoSlider addTarget:self action:@selector(videoSlierChangeValueEnd:)

           forControlEvents:UIControlEventTouchUpInside];

    [topView addSubview:_videoSlider];

    self.videoSlider.maximumValue = CMTimeGetSeconds(duration);

    UIGraphicsBeginImageContextWithOptions((CGSize){ 1, 1 }, NO, 0.0f);

    UIImage *transparentImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    [self.videoSlider setMinimumTrackImage:transparentImage forState:UIControlStateNormal];

    [self.videoSlider setMaximumTrackImage:transparentImage forState:UIControlStateNormal];

UISlider

原文：http://www.cnblogs.com/lee4519/p/4305852.html