Ios SwiftUI-创建类错误：传递给不带参数的调用的参数

我是Swift新手，正在尝试创建一个简单的类“Cat.Swift”，然后将该类传递给我的SceneDelegate文件，然后将其传递给我的ContentView文件

然而，我不断地得到“参数传递给不带参数的调用”错误，并且构建一直失败

Cat.swift代码

class Cat {
    var breed: String = ""
    var personality: String = ""
    var colour: String = ""
    var characterisitics: String = ""

    init(bre: String, pers: String, col: String, chars: String) {
        breed = bre
        personality = pers
        colour = col
        characterisitics = chars
    }
}

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?

    let cat = Cat(bre: "ooo", pers: "ppp", col: "ppp", chars: "ppp")

    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        let contentView = ContentView(cat: cat)
        if let windowScene = scene as? UIWindowScene {
            let window = UIWindow(windowScene: windowScene)
            window.rootViewController = UIHostingController(rootView: contentView)
            self.window = window
            window.makeKeyAndVisible()
        }
    }

SceneDelegate.swift代码

class Cat {
    var breed: String = ""
    var personality: String = ""
    var colour: String = ""
    var characterisitics: String = ""

    init(bre: String, pers: String, col: String, chars: String) {
        breed = bre
        personality = pers
        colour = col
        characterisitics = chars
    }
}

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?

    let cat = Cat(bre: "ooo", pers: "ppp", col: "ppp", chars: "ppp")

    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        let contentView = ContentView(cat: cat)
        if let windowScene = scene as? UIWindowScene {
            let window = UIWindow(windowScene: windowScene)
            window.rootViewController = UIHostingController(rootView: contentView)
            self.window = window
            window.makeKeyAndVisible()
        }
    }

ContentView.swift文件

import SwiftUI

struct ContentView: View {
    var body: some View {
        Text("bugggggy\(cat.bre)")
        }
    }


struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView(cat: Cat(bre: "p", pers: "p", col: "p", chars: "p"))
    }
}

---

这是因为没有参数cat为ContentView的构造函数 所以Xcode提醒了你这一点

下面的代码可以解决您的问题，但不能确定它是否符合您的期望

struct ContentView: View {

    private var cat: Cat

    init(cat: Cat) {
        self.cat = cat
    }

    var body: some View {
        Text("Hello, World!")
    }
}

---

这是因为没有参数cat为ContentView的构造函数 所以Xcode提醒了你这一点

下面的代码可以解决您的问题，但不能确定它是否符合您的期望

struct ContentView: View {

    private var cat: Cat

    init(cat: Cat) {
        self.cat = cat
    }

    var body: some View {
        Text("Hello, World!")
    }
}

---

你的ContentView和它的构造函数在哪里？如果你把所有的参数标签都变成胡言乱语，那么使用

self.

是没有意义的@杰西：是的，你完全正确。谢谢你的提示！下次我会做得更好：）你的ContentView和它的构造函数在哪里？如果你把所有的参数标签都变成乱七八糟的话，那么使用

self.

是没有意义的@杰西：是的，你完全正确。谢谢你的提示！下次我会做得更好：）非常感谢你的帮助，我现在意识到我的错误是多么愚蠢！我一定是需要离开它回来。对不起，我浪费了你的时间。：）非常感谢你的帮助，我现在意识到我的错误是多么愚蠢！我一定是需要离开它回来。对不起，我浪费了你的时间。：）