Programmatically check if iPhone keyboard is on screen or not

Question

Possible Duplicate:
How to programatically check whether a keyboard is present in iphone app?
Detect if UIKeyBoard is Showing

Is there a way to programmatically check if the iPhone's keyboard is on screen or not?

Solution

Basically, you want to add an NSNotificationCenter observer:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow) name:UIKeyboardDidShowNotification object:nil];

Comments

[Mason]

I don't want it to necessarily call a function upon receiving the notification, though, I just want it to check before it adds a subview. It'll affect the frame of the subview.

[Mason]

Oh wait, never mind. I can just change the value of a boolean. Thanks!

[WrightsCS]

You can set the selector to nil, but how else do you expect to know when it appears?