iOS 判断相册相机是否允许

1 判断是否允许使用相机：

 NSString *mediaType = AVMediaTypeVideo;
                AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:mediaType];

                if(authStatus == ALAuthorizationStatusRestricted ||
                   authStatus == ALAuthorizationStatusDenied){

                    [Utils showAlertView:nil :@"请在iPhone的“设置－隐私－相机”选项中，允许轻轻访问您的手机相机。" :@"我知道了"];

                    return;

                }

2 判断是否允许使用相册：

ALAuthorizationStatus author = [ALAssetsLibrary authorizationStatus];
                if (author == ALAuthorizationStatusRestricted ||
                    author == ALAuthorizationStatusDenied) {
                    // 用户不允许应用访问相册

                    [Utils showAlertView:nil :@"请在iPhone的“设置－隐私－照片”选项中，允许轻轻访问您的手机相册。" :@"我知道了"];

                    return;
                }