有没有一种简单的方法可以公开类的NSString或UIColor属性，以便在接口生成器中修改它们？
这将非常有用，例如，将颜色属性添加到自定义视图（然后以编程方式使用），以便在界面生成器中适当地对其进行操作。
这篇来自Cocoa with Love的文章描述了如何使用界面生成器插件进行Mac开发。不幸的是，目前无法将IBPlugins与iPhone SDK一起使用（请注意接口生成器插件编程指南仅出现在Mac OS X文档中，而非iOS文档中）。
在iOS 8中，添加了两个新属性，@IBInspectable和@IBDesignable。这是一篇完整的文章。
http://www.weheartswift.com/make-awesome-ui-components-ios-8-using-swift-xcode-6/
没有办法添加自定义的“非IBOutlet”属性，但我建议您添加一个UILabel来利用它的文本属性，当然，当加载视图时会释放它。
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