Object-C private var mobileDevice文件夹

AVAssetExportSession 裁剪/转码 - /* 参数： asset ：要导出的会话 presetName ：字符串常量 */ - (instancetype)initWithAsset:(AVAsset *)asset presetName:(NSString *)presetName; + (inst...

Object-C 保存文件到相册 1.UIImageWriteToSavedPhotosAlbum 2.AssetsLibrary 3.PHPhotoLibrary Xcode – This app has attempted to access privacy-sensitive data without a usage descripti...

AVFoundation – AVPlayer 播放视频 - AVPlayer 控制播放器的播放，暂停，播放速度;注意更改播放速度要在视频开始播放之后才会生效； AVPlayerItem 管理资源对象，提供播放数据源； AVPlayerLay...

Xcode - This app has attempted to access privacy-sensitive data without a usage description.