self.slider = [[XBVideoSlider alloc]init];
self.slider.frame = CGRectMake(_progressLabel.right, 28*gScale, 480*gScale, 5*gScale);
self.slider.value = 0.0f;
self.slider.tintColor = kClearColor;
self.slider.thumbTintColor = kClearColor;
self.slider.maximumTrackTintColor = [kWhiteColor colorWithAlphaComponent:0.4];
self.slider.minimumTrackTintColor = kWhiteColor;
// UIImage * thumbImage = [UIImage imageNamed:@"XBVideoPlayer_ProgressMaxThumb"]
//[UIImage imageNamed:@"XBVideoPlayer_ProgressMaxThumb"]
//設置進度條背景圖片
// [_slider setThumbImage:thumbImage forState:UIControlStateNormal];