如何在 monotouch 中将自定义视图添加到 XIB 文件定义的视图中

How to add a custom view to a XIB file defined view in monotouch(如何在 monotouch 中将自定义视图添加到 XIB 文件定义的视图中)

问题描述

我目前正在尝试学习单点触控，并按照 Mike BlueStein 的《学习单点触控》一书进行学习.不错的书，但自从 xcode 4 (我相信)和 monotouch 的更新版本问世以来，它有点过时了.

I'm trying to learn monotouch at the moment, and following the learn monotouch book by Mike BlueStein. Not a bad book, but it's slightly outdated since xcode 4 (i believe) and a newer version on monotouch has come out.

无论如何，在我的项目中，我有一个控制器和一个 xib 文件.我还有一个自定义视图(例如 myview : UIView)，它覆盖了 draw 方法.我想在 xib 文件中定义的视图旁边或顶部显示我的自定义视图.我该怎么做?

Anyways, in my project I have a controller and a xib file. I also have a custom view (e.g. myview : UIView), that overrides the draw method. I want to show my custom view next to or on top of the view defined in the xib file. How do I do this?

在控制器中，如果我重写 LoadView 方法，并将 View 设置为我的自定义视图的实例，那么我可以看到它，但是我丢失了 xib 文件中定义的所有内容.如果我尝试添加为子视图，它根本不会出现.

In the controller, If I override the LoadView method, and set the View to an instance of my custom view, then I can see it, but I loose everything defined in the xib file. If I try to add as a sub view, it does not appear at all.

我错过了什么?如果问题不清楚，请问我，以便我澄清.

What am I missing? If the question is not clear, please ask me, so I can clarify.

干杯.

推荐答案

按照以下步骤在 XIB 中使用自定义视图:

Follow the following steps to use a custom view in a XIB:

首先，用 RegisterAttribute 装饰视图:

First, decorate the view with the RegisterAttribute:

[Register("MyView")]
public class MyView : UIView
{
}

并实现以下构造函数:

public MyView(IntPtr handle) : base(handle) {}

当运行时试图在视图被内存警告破坏后重新创建视图时，需要此构造函数.创建自定义类后:

This constructor is needed for when the runtime will try to recreate the view after it has been destroyed by a memory warning. After you have created your custom class:

• 在 Xcode 中打开 XIB(始终通过 MonoDevelop 双击它)并在您想要的位置添加 UIView.
• 在 Xcode 中，将该 UIView 的类设置为 MyView(或您传递给 RegisterAttribute 的任何名称):

• Open the XIB in Xcode (always by double-clicking on it through MonoDevelop) and add a UIView where you want it.
• In Xcode, set that UIView's class to MyView (or whichever name you passed to the RegisterAttribute):

• 编译-运行.

不要为从 XIB 加载的控制器覆盖 LoadView.LoadView 用于在未从 XIB 加载控制器视图时创建控制器视图.

Do not override LoadView for controllers that are loaded from a XIB. LoadView is meant to create the controller's view when that controller's view is not loaded from a XIB.

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