界面生成器中 UIView 的边框颜色不起作用? [英] UIView's border color in Interface builder doesn't work?

问题描述

我正在尝试通过 IB 设置视图的图层属性.除了边框的颜色(属性 layer.borderColor)外，一切正常:

I am trying to set up a view's layer properties via IB. Everything works except for color of the border (property layer.borderColor):

我记得一年前遇到过这个问题，我最终以编程方式解决了这个问题.而且，我仍然可以通过编程方式执行此操作，但我很好奇为什么 layer.borderColor 属性从不通过界面构建​​器工作.我不想导入 QuartzCore，然后仅仅因为这个而编写额外的代码行，这似乎是一种矫枉过正.

I remember running into this problem a year ago and I ended up doing it programatically. And still, I can do this programmatically, but I am curious why the layer.borderColorproperty never works via interface builder. I don't want to import QuartzCore, and then write extra line of code just because of this, seems like an overkill.

推荐答案

可以这样做，但它不是内置功能.这是因为 User Defined Runtime Attributes 面板中的 Color 类型创建了一个 UIColor，但 layer.borderColor 持有一个 CGColorRef类型.不幸的是，没有办法在 Interface Builder 中分配 CGColorRef 类型.

It's possible to do this, but it's not a built-in feature. This is because the Color type in the User Defined Runtime Attributes panel creates a UIColor, but layer.borderColor holds a CGColorRef type. Unfortunately, there's no way to assign a CGColorRef type in Interface Builder.

但是，这可以通过代理属性实现.请参阅Peter DeWeese 的回答对另一个问题的可能解决方案.他的回答定义了一个类别，允许通过 Interface Builder 设置代理颜色.

However, this is possible through a proxy property. See Peter DeWeese's answer to a different question for a possible solution to this problem. His answer defines a category that allows a proxy color to be set through Interface Builder.

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