获取键盘高度

- (void) keyboardWasShown:(NSNotification *) notif

{

    NSDictionary *info = [notif userInfo];

    NSValue *value = [info objectForKey:UIKeyboardFrameBeginUserInfoKey];

    CGSize keyboardSize = [value CGRectValue].size;

    

    NSLog(@"keyBoard:%f", keyboardSize.height);  //216

    ///keyboardWasShown = YES;

}