iOS Swift 可解码 : Error: Cannot invoke initializer for type with no arguments

Question

我在初始化结构时遇到错误，请参阅下面的屏幕截图。调试后我发现在结构中包含 review 变量会产生问题。我不知道我做错了什么。谁能帮帮我？

发送

我正在复制代码以防你需要尝试一下

import UIKit

struct RootValue : Decodable {
    private enum CodingKeys : String, CodingKey {
        case success = "success"
        case content = "data"
        case errors = "errors"
    }
    let success: Bool
    let content : [ProfileValue]
    let errors: [String]
}

struct ProfileValue : Decodable {
    private enum CodingKeys : String, CodingKey {
        case id = "id"
        case name = "name"
        case review = "review" // including this gives error
    }

    var id: Int = 0
    var name: String = ""
    var review: ReviewValues // including this gives error
}

struct ReviewValues : Decodable{
    private enum CodingKeys : String, CodingKey {
        case place = "place"
    }

    var place: String = ""
}

class ViewController: UIViewController {

    var profileValue = ProfileValue()

    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

Answer 1

评论没有默认值，你需要改变这个

var profileValue = ProfileValue()

到

var profileValue:ProfileValue?

或

var review: ReviewValues?

或

在ProfileValue结构中提供init方法