How to detect when keyboard is shown and hidden

Question

How can I detect when the keyboard is shown and hidden from my application?

Accepted Answer

In the ViewDidLoad method of your class set up to listen for messages about the keyboard:

```
// Listen for keyboard appearances and disappearances
[[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(keyboardDidShow:)
                                             name:UIKeyboardDidShowNotification
                                           object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(keyboardDidHide:)
                                             name:UIKeyboardDidHideNotification
                                           object:nil];
```

Then in the methods you specify (in this case `keyboardDidShow` and `keyboardDidHide`) you can do something about it:

```
- (void)keyboardDidShow: (NSNotification *) notif{
    // Do something here
}

- (void)keyboardDidHide: (NSNotification *) notif{
    // Do something here
}
```

How to detect when keyboard is shown and hidden

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