Warning: Attempt to present <AdjustPhotoViewController> on <TakePhotoViewController> while a presentation is in progress

Question

I am using xcode 4.5.2 and created my own OverlayViewController for camera buttons.

Now, when my delegate controller - TakePhotoViewController retrieves the didFinishWithCamera action from OverlayViewController, I would like to transfer the user to AdjustPhotoViewController.

However, I get the following warning and it is not being transferred:

Warning: Attempt to present on while a presentation is in progress!

- (void)didFinishWithCamera
{
    [[self.overlayViewController.imagePickerController presentingViewController] dismissViewControllerAnimated:YES completion:nil];
    [self performSegueWithIdentifier:@"fromTakeToAdjust" sender:self];    
}

Answer 1

The problem was that in TakePhotoViewController, I had :

- (void)viewDidAppear:(BOOL)animated{
   [self openImagePicker];
}

This caused to open the image picker, while trying to close it at the same time.

I added a flag to check it.

Answer 2

Actually, in my experience, this is to do with calling a segue and an IBAction (that calls a segue) from the same button - check the connections inspector in Interface Builder to see if your button is connected to both.

In your storyboard, it may look like this:

In your code, it may look like this:

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if([segue.identifier isEqualToString:@"pushToNewVC"]) {
        UIViewController *controller = (UIViewController *)segue.destinationViewController;
    }
}

=

- (IBAction)launchNew VC:(id)sender {
    [self performSegueWithIdentifier:@"pushToNewVC" sender:sender];
}

Answer 3

You can try this to give time for old transition to finish and new transition to come

usually 0.3 works but adjust it as per your need

- (void)didFinishWithCamera
{
    [[self.overlayViewController.imagePickerController presentingViewController] dismissViewControllerAnimated:YES completion:nil];
    [self performSelector:@selector(showModel) withObject:nil afterDelay:0.3];
}

- (void)showModel {
    [self performSegueWithIdentifier:@"fromTakeToAdjust" sender:self];
}

Answer 4

Please use the following code for the overlay viewcontroller.

please verify with you code.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  
    [self.window addSubview:self.view];
    [self.window makeKeyAndVisible];

    return YES;
}

In viewdidload event following code use

- (void) viewDidLoad {
    self.picker = [[UIImagePickerController alloc] init];
    self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    self.picker.cameraDevice = UIImagePickerControllerCameraDeviceFront;

    self.picker.showsCameraControls = NO;
    self.picker.wantsFullScreenLayout = YES;

    // Insert the overlay
    self.overlay = [[Customview alloc] initWithNibName:@"Customview" bundle:nil];
    self.overlay.pickerRef = self.picker;
    self.picker.cameraOverlayView = self.overlay.view;

    [self presentModalViewController:self.picker animated:NO];
}

In view .h method following code use

   @interface CameraController : UIViewController {
        UIImagePickerController* __picker;
        Customview* __overlay;
    }

@property (nonatomic, retain) UIImagePickerController* picker;
@property (nonatomic, retain) Customview* overlay;

Hope above code may help to you.

Answer 5

Odelya, you should perform all actions with UI that meant to be performed AFTER some animation (in this cae controller dismissal) in the completion block! It actually is created for these purposes. Edit your code like this:

- (void)didFinishWithCamera
{
    if(![[self.overlayViewController.imagePickerController presentingViewController] isBeingDismissed]) {
        [[self.overlayViewController.imagePickerController presentingViewController] dismissViewControllerAnimated:YES completion:^ {
            [self performSegueWithIdentifier:@"fromTakeToAdjust" sender:self];
        }];
    }   
}

EDIT:I've added the if statement, try it now.