swift - 如何从具有同名嵌套类型的类中引用全局类型？

Question

我有一个在全局范围内声明的类和另一个嵌套在某个类中的同名类。

class Address {
    var someProperty: String?
}

class ThirdPartyAPI {
    class Address {
        var someOtherProperty: String?
        init(fromAddress address: Address) {
            self.someOtherProperty = address.someProperty
        }
    }
}

问题是:如何从其初始化程序中引用全局类而不是内部类？在给出的示例中，我遇到了错误 Value of type 'ThirdPartyAPI.Address' has no member 'someProperty'，这意味着编译器引用内部 Address 而不是一个全局性的。

Answer 1

使用typealias

class Address {
    var someProperty: String?
}

typealias GlobalAddress = Address

class ThirdPartyAPI {
    class Address {
        var someOtherProperty: String?
        init(fromAddress address: GlobalAddress) {
            self.someOtherProperty = address.someProperty
        }
    }
}