Forked from renzifeng/ZFPlayer

Based on AVPlayer, support the vertical, horizontal screen(lock screen direction). Support adjust volume, brigtness and video 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。

Objective-C 1