Based on AVPlayer, support for the horizontal screen, vertical screen (full screen playback can also lock the screen direction), the upper and lower slide to adjust the volume, the screen brightness, or so slide to adjust the playback progress.基于AVPlayer，支持横屏、竖屏（全屏播放还可锁定屏幕方向），上下滑动调节音量、屏幕亮度，左右滑动调节播放进度。