通过IBInspectable属性实时渲染IBOutlet连接子视图 [英] Live Render IBOutlet Connected Subviews Via IBInspectable Properties

问题描述

我在iOS 8中第一次使用故事板，到目前为止一直喜欢故事板上的实时渲染方面。但是，我似乎遇到了让我的观点在故事板上正确呈现的障碍。

I'm using storyboards for the first time in iOS 8 and so far have been loving the live rendering aspect of things on the storyboard. However, I seem to have hit a snag in getting my views to render properly on the storyboard.

我有一个容器 UIView 包含与故事板上的 UILabel 的连接，我试图根据 IBInspectable 标签的父容器视图上的属性。

I have a container UIView that contains a connection to a UILabel on the storyboard, I am attempting to set the label's text based on an IBInspectable attribute on the label's parent container view.

@IBDesignable class ContainerView : UIView {
    @IBOutlet weak var : titleLabel : UILabel!

    @IBInspectable var title : String = "" {
        didSet {
            titleLabel?.text = title
        }
    }

    /* Init functions */

    prepareForInterfaceBuilder() {
        self.titleLabel?.text = title
    }
}

如果我在故事板中设置了属性，它会在程序执行时按预期呈现，但无法像我期望的那样在故事板中呈现。我已经检查了我的连接，所有内容似乎都已正确连接。

If I set the attribute in the storyboard it renders as expected while the program is executing but fails to render in the storyboard as I would expect. I've checked my connections and everything appears to be hooked up properly.

我的问题是：是否可以通过IBInspectable属性影响IBOutlet连接视图的内容让他们在故事板上现场渲染，如果是这样，我错过了什么或做错了什么？

My question is: Is it possible to affect the contents of an IBOutlet connected view via IBInspectable attributes and have them live render on the storyboard, and if so, what am I missing or doing wrong?

推荐答案

很遗憾，您无法在界面构建器中看到 IBOutlet 对象您的自定义视图，标记为 IBDesignable 。如果要在界面构建器中查看插座，则必须使用常规变量 IBOutlet ，并且必须以编程方式创建对象。

Unfortunately you can't see IBOutlet objects in interface builder for your custom views which are marked as IBDesignable. If you want to see your outlets in interface builder, you have to use regular variables instead IBOutlet and you have to create your objects programmatically.

另请注意，如果您需要从对象的界面构建器更改某些内容，则必须将您的属性定义为 IBInspectable 。目前以下变量类型对 IBInspectable 有效：

Also please note that, if you need to change something from interface builder for your objects, you have to define your properties as IBInspectable. Currently following variables types are valid for IBInspectable:

Bool ， CGFloat ， CGPoint ， CGRect ， CGSize ， NSInteger ， NSString ， UIColor ， UIImage

我希望这个答案对您来说足够清楚。

I hope this answer is adequately clear for you.

编辑我发现以下文章描述了如何做你需要的方法：

I found following article which is describing a way how to do what you need:

http://justabeech.com/2014/07/27/xcode- 6-live-rendering-from-nib /

2nd Edit：我尝试了这篇文章，但它确实有效。现在我可以在界面构建器

2nd I tried the article and it works. Now I can see my outlets on interface builder

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