Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

keyboardWillShow called twice

I have a view with keyboard notifications such as keyboardWillShow and keyboardWillHide

All the codes handles with the notification I use is taken from Apple's sample code "KeyboardAccessory"

When I first enter this view, everything works fine.

But when I return to this view from its subviews, every time I tap a button that says:

[myTextField becomeFirstResponder];

the keyboardWillShow and keyboardWillHide methods will be called twice every time.

It's really confusing,

Could anyone helps me with this?

really appreciate!

like image 894
Wang Liang Avatar asked Nov 10 '11 16:11

Wang Liang


3 Answers

You might want to post your code.

If your methods are being called twice, most likely, you are registering for the keyboard notifications multiple times and not removing the observer when you think you are.

Add your observer in viewWillAppear: and remove it in viewWillDisappear: and see what happens.

like image 160
Eric Avatar answered Nov 19 '22 09:11

Eric


For me, changing inputAccessoryView would fire another call of keyboardWillShow because the height of an input accessory view affects the overall keyboard height.

like image 8
kgaidis Avatar answered Nov 19 '22 08:11

kgaidis


It is called twice on iOS 8 when a custom keyboard, like SwiftKey is being shown.

On the first call, it probably prepares to show, so CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size; will have a keybaord height of 0.

The second call will have the correct keyboard height, so if you need to adjust content insets, you can check that the height of keyboard returned is > 0 before calculating your insets.

Also, it will be called whenever user changes keyboard.

like image 9
Kof Avatar answered Nov 19 '22 08:11

Kof