CODEWITHSUNDEEP
iosobjective-c
Fogmeister
Fogmeister

Reputation: 77661

UIKeyboardWillShowNotification

I have an observer for UIKeyboardWillShowNotification and UIKeyboardWillHideNotification.

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

It all works, except it works when the viewController is not currently visible.

I've tried comparing to self.navigationcontroller.topViewController but this doesn't work when I have a modal view presented as the topViewController is the one underneath the modal view controller.

Upvotes: 6

Views: 7821

Answers (2)

LuisCien
LuisCien

Reputation: 6432

If you're using UIViewController you could register your instance for Keyboard Notifications when the view becomes visible inside viewWillAppear: and then de-register when the view gets hidden inside viewWillDisappear: This way you won't receive notifications when the view is not visible.

Hope this helps!

Upvotes: 7

Pauls
Pauls

Reputation: 2636

If you only want to react to that notification when the viewController is visible, then just check if is visible at the beginning of the function:

- (void)keyboardWillShow:(NSNotification *)notification
{
    if ([self.view window]) //means is visible
        //do something
    else 
        //return
}

Upvotes: 3

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