一 静音功能

通过调用系统的AVPlayer.muted来实现的

- (void)setMuted:(BOOL)muted {_muted = muted;self.player.muted = muted;if (self.audioMuteChange) {self.audioMuteChange(self, muted);}...
}

播放进度条

/// 滑杆
@property (nonatomic, strong, readonly) ZFSliderView *slider;

使用ControlView自带的进度视图展示