- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    CGPoint point = scrollView.contentOffset;

    // 限制y軸不動
    point.x = 0.f;

    scrollView.contentOffset = point;
}

配合ABKeyboardManager 使用

    UIScrollView *sv = (UIScrollView*)self.view;
    sv.delegate = self;
        ABKeyboardManager *keyboard = [ABKeyboardManager  sharedManager];
 


//           [keyboard.scrollView setContentOffset:CGPointMake(0, 0)];y = 0  代表y  不動
//        [keyboard.scrollView setContentSize:self.view.bounds.size];
        keyboard.keyboardDistanceFromTextField = 100;
    keyboard.scrollView =sv;
        [keyboard startTextFieldObserve:self];

//
//let tap = UITapGestureRecognizer(target: self, action: #selector(tapMe))
 

//self.view.addGestureRecognizer(tap)


//func tapMe() {
//    self.scrollView.contentOffset = CGPoint(x: 0, y: 0)
//    self.userTF.resignFirstResponder()
//    self.pwTF.resignFirstResponder()
//} //自己實現點選檢視的任何地方鍵盤訊息




#pragma mark - ******** 還原之前的移動

- (BOOL)textFieldShouldReturn:(UITextField *)textField{
    [textField resignFirstResponder];

    UIScrollView
 
 *sv = (UIScrollView*)self.view;
    sv.contentOffset = CGPointMake(0, 0);
    return true;
}

鍵盤隱藏之後 就要還原檢視的到原來的座標

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil];

}

- (void)dealloc{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}
#pragma mark - ******** 鍵盤隱藏之後 就要還原

- (void) keyboardWillHide : (NSNotification*)notification {
    CGRect keyboardFrame = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue]; //獲得鍵盤的rect
    //通過rect做響應的彈起等
    UIScrollView *sv = (UIScrollView*)self.view;
    sv.contentOffset = CGPointMake(0, 0);
}