将UIView子类化为在Quartz中绘制 [英] Subclassing UIView to draw in Quartz

问题描述

我正在尝试使用Quartz 2D在我的iPhone应用程序中绘制一个图形。我知道我必须通过继承UIView并覆盖drawRect函数来完成这项工作。我正在尝试按照这个教程来执行此操作，但我无法理解工作。

I'm trying to draw a figure in my iPhone application using Quartz 2D. I understand that I have to do this by subclassing UIView and overriding the drawRect function. I'm trying to follow this tutorial to do this but I can't get it to work.

似乎子类化UIView没有创建像教程似乎暗示的.xib文件。子类化UIViewController（我知道这是错误的，但无论如何我都尝试过）确实创建了.xib文件，但似乎没有drawRect函数。

It seems subclassing UIView does not create a .xib-file like the tutorial seem to imply. Subclassing UIViewController (I know this is wrong but I tried it anyway) does create a .xib-file but does not seem to have the drawRect-function.

有没有人有这方面的经验，或者知道我做错了什么？

Has anyone any experience in this, or knows what I'm doing wrong?

提前谢谢你，
Tobias Tovedal

Thank you in advance, Tobias Tovedal

推荐答案

1. 创建一个 UIView 子类并将您的绘图代码放入其 drawRect：方法。您不需要NIB文件（如果您自己绘制视图，为什么会这样？）。

1. Create a UIView subclass and put your drawing code in its drawRect: method. You don't need a NIB file (why would you if you draw the view yourself?).

在视图控制器中，创建自定义的实例查看类，设置视图的框架并将其添加到视图控制器的视图中： [self.view addSubview：myCustomView]; 。

In a view controller, create an instance of your custom view class, set the view's frame and add it to the view controller's view with: [self.view addSubview:myCustomView];.

没有第3步。

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