CODEWITHSUNDEEP
iosuinavigationcontrollerpushviewcontroller
Strong Like Bull
Strong Like Bull

Reputation: 11297

nested push animation can result in corrupted navigation bar error

To the best of my knowedge I do not believe I am doing anything wrong however I am getting:

2011-04-02 14:55:23.350 AppName[42430:207] nested push animation can result in corrupted navigation bar
2011-04-02 14:55:23.352 AppName[42430:207] nested push animation can result in corrupted navigation bar
2011-04-02 14:55:23.729 AppName[42430:207] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.
2011-04-02 14:55:23.729 AppName[42430:207] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.

Here is my code

- (IBAction) btnGetCurrentLocation{
    [SVProgressHUD showWithStatus:@"Getting current location..."];
    locationManager = [[CLLocationManager alloc] init];
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.delegate = self;
    [locationManager startUpdatingLocation];
    [SVProgressHUD dismiss];
}

- (void)locationManager:(CLLocationManager *)manager 
    didUpdateToLocation:(CLLocation *)newLocation 
           fromLocation:(CLLocation *)oldLocation {

    [locationManager stopUpdatingLocation];
    CLLocationCoordinate2D coordinate = newLocation.coordinate;

    LocationMapViewController *locationMapViewController = [[LocationMapViewController alloc] initWithNibName:@"LocationMapViewController_iPhone" bundle:nil];
    locationMapViewController.title=@"Your Title";
    locationMapViewController.centerOfMap = &(coordinate);
    [self.navigationController pushViewController:locationMapViewController animated:YES]; 

}

I googled it however most places talk about putting animation:NO however then I do not see the map on next screen.

Upvotes: 1

Views: 6779

Answers (4)

Ian Holmes
Ian Holmes

Reputation: 149

I'm not 100% sure if this addresses your specific problem, but I got the nested pop animation can result in corrupted navigation bar message when I was trying to pop a view controller before it had appeared. Override viewDidAppear to set a flag in your UIViewController subclass indicating that the view has appeared (remember to call [super viewDidAppear] as well). Test that flag before you pop the controller. If the view hasn't appeared yet, you may want to set another flag indicating that you need to immediately pop the view controller, from within viewDidAppear, as soon as it has appeared. Like so:

@interface MyViewController : UIViewController {
    bool didAppear, needToPop;
}

...and in the @implementation...

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    didAppear = YES;
    if (needToPop)
        [self.navigationController popViewControllerAnimated:YES];
}

- (void)myCrucialBackgroundTask {
    // this task was presumably initiated when view was created or loaded....
    ...
    if (myTaskFailed) {  // o noes!
        if (didAppear)
            [self.navigationController popViewControllerAnimated:YES];
        else
            needToPop = YES;
    }
}

The duplicated popViewControllerAnimated call is a bit ugly, but the only way I could get this to work in my currently-tired state.

Upvotes: 0

tronnick
tronnick

Reputation: 21

Another solution I found I could convert all my code into storyboard, and walla, it works again. sweet. its not as hard as it looks, cheers, tronnick

Upvotes: 2

HotJard
HotJard

Reputation: 4808

Make sure you haven't pushed into navigation stack two or more UIViewControllers at the same time.

Upvotes: 1

Jonathan Naguin
Jonathan Naguin

Reputation: 14766

You are pushing a new controller every time that CLLocationManager notify a change of location from the same controller. That results in a nested navigation. Trying to hold a reference to LocationMapViewController in that controller at first time that you are being notified, and later check it to notify it:

if (self.locationController == null){
     LocationMapViewController *locationMapViewController = [[LocationMapViewController alloc] initWithNibName:@"LocationMapViewController_iPhone" bundle:nil];
    locationMapViewController.title=@"Your Title";
    locationMapViewController.centerOfMap = &(coordinate);
    [self.navigationController pushViewController:locationMapViewController animated:YES]; 
}else{
    [self.locationController locationDidChangeTo: &(coordinate)];
}

Another alternative is creating the CLLocationManager in the LocationMapViewController...

Upvotes: 4

Related Questions