继承可编码类引发错误“必需的初始化程序”

Question

我继承了 Codable 类，如下所示。

class Vehicle: Codable {
    let id: Int
    let name: String
    
    init(id: Int, name: String) {
        self.id = id
        self.name = name
    }
}

class Car: Vehicle {
    let type: String
    
    init(id: Int, name: String, type: String) {
        self.type = type
        super.init(id: id, name: name)
    }
}

显示错误

'required' initializer 'init(from:)' must be provided by subclass of 'Vehicle'

什么是继承可编码类的正确方法？

Answer 1

如果您允许 Xcode 修复该问题，它会将此方法添加到子类中：

required init(from decoder: Decoder) throws {
    fatalError("init(from:) has not been implemented")
}