Warning: Attempt to present uiimagepickercontroller while a presentation is in progress - ios

Question

After dismiss camera. It give me this warning: Attempt to present on while a presentation is in progress!
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[self dismissViewControllerAnimated:YES completion:nil];
}
I don't know if this is a big issue.
More Code:
- (void) viewWillAppear:(BOOL)animated
{
[self takePicture];
}
- (void) takePicture
{
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
[imagePickerController setSourceType:UIImagePickerControllerSourceTypeCamera];
} else
[imagePickerController setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
imagePickerController.delegate = self;
[self presentViewController:imagePickerController animated:YES completion:nil];
}
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[self dismissViewControllerAnimated:NO completion:nil];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[self dismissViewControllerAnimated:NO completion:nil];
}
By the way, "dismissModalViewController" is deprecated.
Fix:
ViewWillAppear will be invoked once there is a new view. That's the problem

Answer 1

You should not present any controller from viewWillAppear because the presentation of the current view controller is not yet completed.
Call takePicture from viewDidAppear because viewDidAppear will be called once the presentation of controller completed .
- (void)viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
[self takePicture];
}
Hope this will help you.

Answer 2

You probably have presented some view controller like this
[self presentViewController:someVC animated:YES completion:nil];
and before the animation is get completed your below method is called
imagePickerControllerDidCancel
You can check it by changing it to
[self presentViewController:someVC animated:NO completion:nil];
notice animation:NO above.