如果用户在打开相机时单击“不允许”按钮，则访问相机

Question

这是我第一次使用相机。让我解释一下我的应用程序。它由一个录制按钮组成，当用户单击录制按钮时，它会打开相机并要求用户授予访问权限相机和麦克风。因此，如果用户在询问相机或麦克风或访问照片时单击“不允许”按钮，尽管他单击“不允许”按钮，但我可以打开相机。以下是我用来打开相机的代码

 if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

    // alert the user that the camera can't be accessed
    UIAlertView *noCameraAlert = [[UIAlertView alloc] initWithTitle:@"No Camera" message:@"Unable to access the camera!" delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
    [noCameraAlert show];

} else {

imagePickerCustom = [[UIImagePickerController alloc] init];
imagePickerCustom.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerCustom.delegate = self;
imagePickerCustom.allowsEditing = NO;
imagePickerCustom.showsCameraControls = NO;
imagePickerCustom.cameraDevice = UIImagePickerControllerCameraDeviceFront;
imagePickerCustom.videoMaximumDuration = 61;
imagePickerCustom.videoQuality = UIImagePickerControllerQualityTypeMedium;
imagePickerCustom.navigationBarHidden = YES;
imagePickerCustom.toolbarHidden = YES;
imagePickerCustom.wantsFullScreenLayout = YES;



    //add tap gesture on camera
    //  UITapGestureRecognizer *singleFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self
//                                                        action:@selector(handleSingleTap:)];





imagePickerCustom.wantsFullScreenLayout = YES;

    //to get camera full screen
imagePickerCustom.cameraViewTransform = CGAffineTransformScale(imagePickerCustom.cameraViewTransform, CAMERA_TRANSFORM, CAMERA_TRANSFORM);

imagePickerCustom.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];
imagePickerCustom.videoQuality = UIImagePickerControllerQualityTypeMedium;
NSArray *sourceTypes =
[UIImagePickerController availableMediaTypesForSourceType:imagePickerCustom.sourceType];
if (![sourceTypes containsObject:(NSString *)kUTTypeMovie ]){
    NSLog(@"Can't save videos");
}
  else if{
 NSLog(@"open camera overlayview");
  }

我知道一些检测用户访问相机的代码

 ALAssetsLibrary *lib = [[ALAssetsLibrary alloc] init];

  [lib enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos            usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
    NSLog(@"%i",[group numberOfAssets]);
   } failureBlock:^(NSError *error) {
  if (error.code == ALAssetsLibraryAccessUserDeniedError) {
    NSLog(@"user denied access, code: %i",error.code);
  }else{
     NSLog(@"Other error code: %i",error.code);
   }
     }];

如果用户在提示使用相机或麦克风时点击“不允许”按钮，我是否有必要关闭相机。如果点击“不允许”，我可以打开相机。我不想访问任何画廊视频.用户只需录制视频并上传到服务器。

在此先感谢....

Answer 1

转到设置并转到您的应用，然后单击隐私并打开相机开关。 （或者） 转到设置并转到隐私并打开您应用上的相机开关。