我收到以下错误：使用未声明的类型＆＃39;等级＆＃39; var等级：[等级] = []，那么如何修复该错误？

Question

I was working with the code in the following picture then i got a message says:use of undeclared type 'Grade' var grades: [Grade] = [] 那我该怎么办？

Answer 1

似乎没有声明Grade。在创建具有该类型的数组之前，您必须这样做。例如，将以下代码添加到您的文件中。

class Grade {
    var grade: Int
    var name: String

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