在調用手機攝像頭時,需要判用戶設備是否開啓攝像頭權限,以便提示用戶,例子請看微信盆友圈的拍照功能
1. 有權限
AVCaptureDevice.authorizationStatusForMediaType(AVMediaTypeVideo) == AVAuthorizationStatus.Authorized
2.無權限
AVCaptureDevice.authorizationStatusForMediaType(AVMediaTypeVideo) == AVAuthorizationStatus.Denied
或者
AVCaptureDevice.authorizationStatusForMediaType(AVMediaTypeVideo) ==AVAuthorizationStatus.NotDetermined