Which Controller was before?

Question

I got TabBar Application with 3 ViewControllers. Can i know from the ViewControllers's method which ViewContoller was desplayed before (1 or 2)? Or maybe i open VeiwController from some other .xib

score 3 · Answer 1 · answered Feb 09 '12 at 13:46

3

You can do this by implementing UITabBarController delegate method -

- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController
{
}

in this you can check for [tabBarController selectedViewController] , here selectedViewController is the view controller which is currently selected and viewController is which is going to be selected.

answered Feb 09 '12 at 13:46

saadnib

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But i need to know which controller was selected – Eugene Trapeznikov Feb 09 '12 at 13:58
1

just make a global UIViewController's instance and when you tap on a tab then the above method will call and here set your global var to the value of [tabBarController selectedViewController] and you can check what view controller it is ... – saadnib Feb 09 '12 at 14:15
can you explain how should i do it? – Eugene Trapeznikov Feb 09 '12 at 14:16

score 1 · Accepted Answer · answered Feb 13 '12 at 04:13

I just creating @property in target VeiwController and set this @property firstly in viewDidLoad. So i know that firstly this ViewController will appear from TabBar. After that i can change it in some other ViewController's methods, which call some subviews (.xib).

Which Controller was before?

2 Answers2