Question

我在解决xamarin问题时遇到了一些困难。在我的viewcontroller的ViewDidAppear中，我正在注册一个轻击手势。

ProfileViewController

public override void ViewDidAppear (bool animated)
        {
            base.ViewDidAppear (animated);
            if (!_hasUi) {
                SetUi ();
            }

            SetProfile ();

            if (CheckConnectivityStatus ()) {

                SetGameData ();

                if (_hasRegisteredGestures) return;
                //SetGestures();
                AssignGesturesToUi();


                _hasRegisteredGestures = true;
            } else {
                HandleWebAPICallError ();
            }
        }


 public void AssignGesturesToUi()
        {

            _bonusTap = new UITapGestureRecognizer(ShowBonus) { CancelsTouchesInView = false };

            _userProfile.VwLevel.MultipleTouchEnabled = false;
            _userProfile.VwLevel.UserInteractionEnabled = true;
            _userProfile.VwLevel.AddGestureRecognizer(_bonusTap);

        }

然后我的ShowBonus方法将tap作为参数。

private void ShowBonus (UITapGestureRecognizer tap)
        {
            if (tap.State == UIGestureRecognizerState.Cancelled)
                return;

            _userProfile.VwLevel.UserInteractionEnabled = true;

            //RemoveGestures();
                var tab = TabBarController as GameTabController;
                tab?.SetTabBarVisible(false, true);
                var mainStoryboard = UIStoryboard.FromName("Main", null);
                var achievementsViewController = (AchievementsViewController)mainStoryboard.InstantiateViewController("AchievementsViewController");
                AddChildViewController(achievementsViewController);
                achievementsViewController.Achievements = false;
                achievementsViewController.View.Transform = CGAffineTransform.MakeScale(0.01f, 0.01f);
                achievementsViewController.View.Center = _userProfile.ConvertPointToView(_userProfile.Cup.Center, View);
                achievementsViewController.ReturnPoint = achievementsViewController.View.Center;
                View.AddSubview(achievementsViewController.View);
                achievementsViewController.View.Alpha = 0.0f;
                UIView.Animate(0.5f, 0.0f, UIViewAnimationOptions.CurveEaseInOut,
                    () => {
                        achievementsViewController.View.Transform = CGAffineTransform.MakeScale(1.0f, 1.0f);
                        achievementsViewController.View.Center = View.Center;
                        achievementsViewController.View.Alpha = 1.0f;
                    },
                    () => {
                        achievementsViewController.DidMoveToParentViewController(this);

                    });

        }

显示奖金显示个人资料视图前面的另一个视图。如果我快速点击UI，它将触发代码两次。是否有可能即使我快速点击多次，它只会激活一次代码？

Answer 1

定义DateTime类型的变量lastShowPress并在上次调用ShowBonus时存储它。在ShowBonus开始时检查ShowBonus是否被调用，比如10秒或你需要的任何间隔。如果是 - 返回，如果不是 - 存储时间并执行。您需要通过锁定对象保护此变量/检查。

UITapGestureRecognizer xamarin - 快速多次点击可以显示多个视图

1 个答案: