在UIView中画线 [英] Draw line in UIView

问题描述

我需要在UIView中绘制一条水平线。最简单的方法是什么。例如，我想在y-coord = 200处绘制黑色水平线。

I need to draw a horizontal line in a UIView. What is the easiest way to do it. For example, I want to draw a black horizontal line at y-coord=200.

我不使用Interface Builder。

I am NOT using Interface Builder.

推荐答案

在你的情况下（水平线）最简单的方法是添加一个黑色背景颜色和框架<$ c $的子视图c> [0,200,320,1] 。

The easiest way in your case (horizontal line) is to add a subview with black background color and frame [0, 200, 320, 1].

代码示例（我希望没有错误 - 我在没有Xcode的情况下编写了它） ：

Code sample (I hope there are no errors - I wrote it without Xcode):

UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, 200, self.view.bounds.size.width, 1)];
lineView.backgroundColor = [UIColor blackColor];
[self.view addSubview:lineView];
[lineView release];
// You might also keep a reference to this view 
// if you are about to change its coordinates.
// Just create a member and a property for this...

另一种方式是创建一个将在其drawRect方法中绘制一条线的类（您可以看到我的代码示例这里）。

Another way is to create a class that will draw a line in its drawRect method (you can see my code sample for this here).

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