添加监听

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardAction:) name:UIKeyboardWillShowNotification object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardAction:) name:UIKeyboardWillShowNotification object:nil];

键盘监听事件

 // 键盘监听事件
-(void)keyboardAction:(NSNotification *)sender{
  NSDictionary *userInfo = [sender userInfo];
  NSValue *value = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
// 通过通知对象获取键盘frame: [value CGRectValue]
  CGFloat keyboardHeight = [value CGRectValue].size.height;
  CGFloat bottomHeight = self.Height - self.backgroundView.Bottom - 15;
  if (bottomHeight <= keyboardHeight) {
    [UIView animateWithDuration:0.2 animations:^{
      self.backgroundView.Top = self.backgroundView.Top - keyboardHeight + bottomHeight;
    }];
  }
}

可能用到的其他方法

// 点击非TextField区域取消第一响应者
 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
     [self.inputField resignFirstResponder];
 }
 
 // 点击键盘Return键取消第一响应者
 - (BOOL)textFieldShouldReturn:(UITextField *)textField{
     [self.inputField resignFirstResponder];
     return  YES;
 }
 
 // 点击按钮取，消第一响应者
 - (IBAction)okAction:(UIButton *)sender {
     [self.inputField resignFirstResponder];
 }