How to detect when keyboard is shown and hidden

Question

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

Answer 1

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 }