在调用手机摄像头时,需要判用户设备是否开启摄像头权限,以便提示用户,例子请看微信盆友圈的拍照功能
1. 有权限
AVCaptureDevice.authorizationStatusForMediaType(AVMediaTypeVideo) == AVAuthorizationStatus.Authorized
2.无权限
AVCaptureDevice.authorizationStatusForMediaType(AVMediaTypeVideo) == AVAuthorizationStatus.Denied
或者
AVCaptureDevice.authorizationStatusForMediaType(AVMediaTypeVideo) ==AVAuthorizationStatus.NotDetermined