如何指定嵌套的自定义视图类？ [英] How to specify nested custom view class?

问题描述

可用
嵌套类SuperView和NestedView。

Available nested classes SuperView and NestedView.

class SuperView : UIImageView {

    class NestedView : UIImageView {
        var text : String = "Nested View"
    }

    var text : String = "Super View"
    var nested : NestedView?

}

我想要来设置对于UIImageView，名为Custom Class Name的属性在Storyboard场景的检查器中为NestedView值。但是Interface Builder找不到NestedView类。

I would like to set for a UIImageView the property named "Custom Class Name" to value "NestedView" inside the inspector of the storyboard scene. But the Interface Builder couldn't find "NestedView" class.

推荐答案

目前，我认为Interface Builder只识别Objective-C的名称类。您仍然可以使Interface Builder找到一个带有@objc关键字的嵌套类：

At this time, I think that Interface Builder only recognizes the names of Objective-C classes. You can still make Interface Builder find a nested class with the @objc keyword:

class SuperView: UIView {
  @objc(SVNestedView) class NestedView: UIImageView {
  }
}

然后，在Interface Builder中，指定该视图是SVNestedView类。由于Objective-C没有命名空间，你仍然需要为每个嵌套类选择唯一的名称，但至少Swift方面是正确的命名空间。

Then, in Interface Builder, specify that th view is of class SVNestedView. Since Objective-C isn't namespaced, you still need to pick unique names for each nested class, but at least the Swift side is properly namespaced.

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