显示keyboard及输入框上移

#pragma mark -

#pragma mark Keyboard notifications from Apple's UICatalog example

//The code comes straight from Apple's UICatalog example, except that I have modified the UI manipulation

//to use bounds instead of frame, so that when keyboard is shown, the view "scrolls" to the right place

//so that the input field would remain visible.

- (void)keyboardWillShow:(NSNotification *)aNotification {

　　// the keyboard is showing so resize the my height

　　CGRect keyboardRect = [[[aNotification userInfo] objectForKey:UIKeyboardBoundsUserInfoKey] CGRectValue];

　　NSTimeInterval animationDuration = [[[aNotification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey]　　　　　　　　　　　　　　　　　　　　　　　　　　　　doubleValue];

 

　　CGRect bounds = self.view.bounds;

　　bounds.origin.y += keyboardRect.size.height;

 

　　[UIView beginAnimations:@"ResizeForKeyboard" context:nil];

　　[UIView setAnimationDuration:animationDuration];

 　　self.view.bounds = bounds;

　　[UIView commitAnimations];

}

 

- (void)keyboardWillHide:(NSNotification *)aNotification {

　　// the keyboard is hiding reset the table's height

 　　CGRect keyboardRect = [[[aNotification userInfo] objectForKey:UIKeyboardBoundsUserInfoKey] CGRectValue];

　　NSTimeInterval animationDuration = [[[aNotification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey]　　　　　　　　　　　　　　　　　　　　　　　　　　　　doubleValue];

 　　CGRect bounds = self.view.bounds;

 　　bounds.origin.y -= keyboardRect.size.height;

 

　　[UIView beginAnimations:@"ResizeForKeyboard" context:nil];

　　[UIView setAnimationDuration:animationDuration];

　　self.view.bounds = bounds;

　　[UIView commitAnimations];

}