iOS監聽系統鍵盤的出現和消失

//注冊鍵盤出現的通知


[[NSNotificationCenter defaultCenter] addObserver:self

                                         selector:@selector(keyboardWasShown:)

                                             name:UIKeyboardWillShowNotification object:nil];

//注冊鍵盤消失的通知

[[NSNotificationCenter defaultCenter] addObserver:self

                                         selector:@selector(keyboardWillBeHidden:)

                                             name:UIKeyboardWillHideNotification object:nil];



(void)keyboardWasShown:(NSNotification*)aNotification

{

//鍵盤高度

CGRect keyBoardFrame = [[[aNotification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];


}
-(void)keyboardWillBeHidden:(NSNotification*)aNotification
{
}</pre>