在 Swift 中通过下标访问属性

我在 Swift 中有一个自定义类，我想使用下标来访问它的属性，这可能吗?

I have a custom class in Swift and I'd like to use subscripting to access its properties, is this possible?

我想要的是这样的:

class User {
    var name: String
    var title: String

    subscript(key: String) -> String {
        // Something here
        return // Return the property that matches the key…
    }

    init(name: String, title: String) {
        self.name = name
        self.title = title
    }
}

myUser = User(name: "Bob", title: "Superboss")
myUser["name"] // "Bob"

更新:我寻找这个的原因是我正在使用 GRMustache 从 HTML 模板渲染.我希望能够将我的模型对象传递给 GRMustache 渲染器......

Update: The reason why I'm looking for this is that I'm using GRMustache to render from HTML templates. I'd like to be able to just pass my model object to the GRMustache renderer…

GRMustache 使用键控下标 objectForKeyedSubscript: 方法和键值编码 valueForKey: 方法获取值.任何合规对象都可以为模板提供值.

GRMustache fetches values with the keyed subscripting objectForKeyedSubscript: method and the Key-Value Coding valueForKey: method. Any compliant object can provide values to templates.

https://github.com/groue/GRMustache/blob/master/Guides/view_model.md#viewmodel-objects