初始化类的麻烦

Question

如果我省略了类初始化器，我会得到一个错误；如果我添加所有五个初始化程序，我仍然会收到一个错误，说我没有初始化所有存储的属性。所有初始化程序都显示在初始化之前使用的错误'Variable'self.baseCur'。

struct BaseModel: Codable {
    var baseS: String
    var baseI: Int
    var baseSym: String
    var baseCunN: String
    var baseCurN: String
}

class TotalFormats: ObservableObject {
    
    @Published var baseCur: BaseModel
       
    init() {
        self.baseCur.baseS = "USD"
        self.baseCur.baseI = 0
        self.baseCur.baseSym = "$"
        self.baseCur.baseCunN = "United States"
        self.baseCur.baseCurN = "Dollar"
    }
}

Answer 1

它还没有创建，只是声明了，这就是错误的原因。你需要通过构造函数来创建它

class TotalFormats: ObservableObject {
    
    @Published var baseCur: BaseModel
       
    init() {
        self.baseCur = BaseModel(baseS: "USD", baseI: 0, baseSym: "$", 
           baseCunN: "United States", baseCurN: "Dollar")
    }
}

或

class TotalFormats: ObservableObject {
    
    @Published var baseCur = BaseModel(baseS: "USD", 
       baseI: 0, baseSym: "$", baseCunN: "United States", baseCurN: "Dollar")
       
}