UITextField清除按钮用于屏幕动画

我有一个屏幕,当用户输入文本字段时,它会执行动画(向上移动屏幕),以便在输入数据时保持可见,然后在用户完成输入数据后向下移动。我遇到的问题是,当用户尝试使用文本框内的清除按钮时(设置为site_TextField.clearButtonMode=UITextFieldViewModeAlways)。按下清除按钮时,文本字段的流程应为:

textFieldShouldEnd编辑-->textFieldDidEndEditing-->text字段应清除-->text字段应开始编辑-->textFieldDid开始编辑

然而,textFieldDidEndEditing方法是调用动画的地方,当执行动画时,上述序列停止,并且不会调用textFieldShouldClear。我希望这是我刚刚错过的简单的东西。欢迎您提供任何意见!

- (BOOL)textFieldShouldBeginEditing:(UITextField *) textField
{
    NSLog(@"In textFieldShouldBeginEditing");
    return YES;
}

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    if (textField == site_TextField || textField == phone_TextField) {
        [self animateTextField: textField up: YES];
    }
}

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
    NSLog(@"In textFieldShouldEndEditing");
    return YES;
}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    if (textField == site_TextField || textField == phone_TextField) {
        [self animateTextField: textField up: NO];
    }
}

- (BOOL)textFieldShouldClear:(UITextField *)textField {

    NSLog(@"In textFieldShouldClear");
    return YES;
}

- (void) animateTextField: (UITextField*) textField up: (BOOL) up
{
    if (textField != site_TextField && textField != phone_TextField) {
        return;
    }

    int movementDistance = 0;
    if (textField == site_TextField) {
        movementDistance = 100;
    } else if (textField == phone_TextField) {
        movementDistance = 170;
    }

    int movement = (up ? -movementDistance : movementDistance);

    [UIView animateWithDuration:0.3
                          delay:0.0
                        options: UIViewAnimationOptionAllowUserInteraction
                     animations:^{
                        self.view.frame = CGRectOffset(self.view.frame, 0, movement);
                    }
                     completion:^(BOOL finished){
                     }];
}