对于“actionSheetAlert"，后面是什么(动作)=> [英] For "actionSheetAlert", what's after (action) =>

问题描述

我正在使用 Xamarin 的 ActionSheet Alert 功能并按照官方网站的说明进行操作.网站给出的样本显示为

I'm using Xamarin's ActionSheet Alert function and following the instruction from official website. The sample given by website is shown as

actionSheetAlert.AddAction(UIAlertAction.Create("Item One",UIAlertActionStyle.Default, (action) => Console.WriteLine ("Item One pressed.")));

在(action) =>之后，它只展示了我们如何在这里添加一个函数，即(action) =>Console.WriteLine(第一个被按下.")

After (action) =>, it only shows how we can add one function here, which is (action) => Console.WriteLine ("Item One pressed.")

如果我想添加更多操作怎么办?我可以只使用 (action) =>{......} ?或者我可以使用 (action) =>function1()?你能告诉我更多的例子，我可以在 (action) => 之后做吗?

What if I want to add more actions? Can I just use (action) => {......} ? Or can I use (action) => function1()? Could you please show me more examples that I can do after (action) => ?

推荐答案

这是 UIActionSheet 的示例代码，应该可以帮到你.

That's sample code for UIActionSheet, it should can help you.

    using System;
    using System.Collections.Generic;
    using UIKit;

    namespace TestActionSheet
    {
    public class SimpleSheet
    {
        public delegate void SelectedHandler(string selectedValue);
        public event SelectedHandler Selected;
        private UIActionSheet actionSheet;

        public SimpleSheet(List<string> optionList)
        {
            actionSheet = new UIActionSheet("SheetTitle");
            foreach (string str in optionList)
            {
                actionSheet.Add(str);
            }
            actionSheet.AddButton("Cancel");

            actionSheet.Clicked += (sender, e) =>
            {
                if (e.ButtonIndex < actionSheet.ButtonCount - 1)
                {
                    if (null != Selected)
                        Selected(optionList[(int)e.ButtonIndex]);
                }
            };
        }

        public void Show(UIView view)
        {
            actionSheet.ShowInView(view);
        }
    }
}

并像这样调用这些代码:

And invoke those code like this:

SimpleSheet sSheet = new SimpleSheet(new System.Collections.Generic.List<string>() { "option1", "option2" });
                sSheet.Selected += (selectedValue) => {
                    Console.WriteLine("SelectedValue = "+selectedValue);
                };
                sSheet.Show(this.View);

希望能帮到你.

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