searchDisplayController message sent to deallocated instance (only in iOS7)

Question

This is my code in AppDelegate

iMapView = [[iMapViewController alloc] init];
    if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
    {
        CGSize result = [[UIScreen mainScreen] bounds].size;
        if(result.height == 568)
        {
            iMapView.view.frame = CGRectMake(0, 0, 568, 320);
        }
    }

    [viewController.view addSubview:iMapView.view];  // crashing here

I turn on NSZombie and found the problem:

[iMapViewController searchDisplayController]: message sent to deallocated instance 0xd81d740

But i have never ever use searchDisplayController or its delegate anywhere.

@interface iMapViewController : UIViewController<UIAlertViewDelegate>

It only happen in iOS 7 with non-ARC.

Could you please give me some advice?

Thank you

Answer 1

Once do this, don't make a global instance of your view controller.

iMapViewController *newObject = [[iMapViewController alloc]initWithNibName:@"iMapViewController" bundle:nil];  

May be you are releasing your iMapView and accessing it again.