Navigation controller popViewControllerAnimated : yes is not working as expected

Question

I am using following line of code:

[self.navigationController popViewControllerAnimated:YES];

But it is not behaving in ios 7 as it doing in ios 6.Some times it does not pop controller while we are pressing back button 2- 3 times in succession.
Resulting in abrupt behaviour in navigation bar and deallocating a controller but showing the same on ui .
So when we press anything on that controller it results to a crash since controller is already deallocated.

Answer 1

Check if you're running the code on the UI thread