Question

我有一个结构Student，它包含另一个结构Address：

public struct Student {
  public struct Address {
     public static let street = "xyz"
  }
}

在学生的单元测试中，我尝试通过以下方式访问街道：

 switch(someStr) {
     case is Student.Address.street:
      ...
    }

我收到编译错误：Static let 'street' is not a member type of 'Student.Address'为什么？如何通过street访问Student呢？

（此问题仅在单元测试中。）

Answer 1

您尚未在街道变量中定义其类型var或let。

检查以下内容：

public struct Student {
  public struct Address {
     public static let street = "xyz"
  }
}

let street = Student.Address.street

switch(street) {

case Student.Address.street:
    print("vishal")
    break
default:
    break
}

Answer 2

您错过了let：

public struct Student {
    public struct Address {
        public static let street = "xyz"
    }
}

访问嵌套结构

2 个答案: