iOS系统权限获取

iOS系统权限：

相册、相机、麦克风、推送通知、AppleMusic

相册权限状态：ALAuthorizationStatus status = [ALAssetsLibrary authorizationStatus];

相机权限状态：AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];

麦克风权限状态：AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeAudio];

AppleMusic：MPMediaLibraryAuthorizationStatus authorizationStatus = MPMediaLibrary.authorizationStatus;