c# - Toast 通知 Xamarin iOS

Question

我正在使用 Xamarin (C#) 编写适用于 iOS 的应用程序。

iOS 中 Android 的“toast 通知”相当于什么？

来自 documentation :

A toast provides simple feedback about an operation in a small popup. It only fills the amount of space required for the message and the current activity remains visible and interactive. For example, navigating away from an email before you send it triggers a "Draft saved" toast to let you know that you can continue editing later. Toasts automatically disappear after a timeout.

例如在 Android (C#) 中我可以这样显示它们:

Toast.MakeText(this, "Added " + counttext.Text +" pcs to cart" , ToastLength.Long).Show();

如何为 iOS 编写相同的代码？

感谢您的回答。

Answer 1

在 Xamarin iOS 中，您必须使用自定义设计的带有动画的 UIView 才能达到相同的效果

public void ShowToast(String message, UIView view)
    {
        UIView residualView = view.ViewWithTag(1989);
        if (residualView != null)
            residualView.RemoveFromSuperview();

        var viewBack = new UIView(new CoreGraphics.CGRect(83, 0, 300, 100));
        viewBack.BackgroundColor = UIColor.Black;
        viewBack.Tag = 1989;
        UILabel lblMsg = new UILabel(new CoreGraphics.CGRect(0, 20, 300, 60));
        lblMsg.Lines = 2;
        lblMsg.Text = message;
        lblMsg.TextColor = UIColor.White;
        lblMsg.TextAlignment = UITextAlignment.Center;
        viewBack.Center = view.Center;
        viewBack.AddSubview(lblMsg);
        view.AddSubview(viewBack);
        roundtheCorner(viewBack);
        UIView.BeginAnimations("Toast");
        UIView.SetAnimationDuration(3.0f);
        viewBack.Alpha = 0.0f;
        UIView.CommitAnimations();
    }