Objective C: How to present modal view controller from appdelegate?

objective-c ios modalviewcontroller
Zhen picture Zhen · Aug 15, 2011 · Viewed 15.4k times · Source

I am in the appdelegate of my application. How can I add a modal view controller in the "didfinishlaunching" method?

I tried the following but did not work

SomeViewController *vc = [[SomeViewController alloc]init];
[self.tabController.navigationController presentModalViewController:vc animated:NO];

EDIT: I changed my implementation to the following

self.tabController.selectedViewController 
= [self.tabController.viewControllers objectAtIndex:0];
SomeViewController *vc = [[SomeViewController alloc]init];
[self.tabController.selectedViewController presentModalViewController:vc animated:NO];

I checked that the 'selected view controller' is not null... however I am still not able to get the output I needed. Is there anything I am missing?

Answer

Joe picture Joe · Aug 15, 2011

Assuming tabController and navigationController are not nil, the applicationDidFinishLaunching may be too soon to display the modal view controller.

  1. Make sure you put that code after you make the window key and visible. [self.window makeKeyAndVisible];
  2. If that does not work try listening for the UIWindowDidBecomeKeyNotification for that window
  3. You can try delaying presentation of that modal a few seconds using performSelector:withObject:afterDelay:

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