'；自我'；在初始化所有存储属性之前使用SwiftUI

这是我的密码。你知道这是什么错误吗？谢谢大家!

struct PlaceholderImageView: View {
    @ObservedObject var imageModel: PlaceholderImageViewModel
    @Environment(\.MyImageCacheValue) var cache: MyImageCache
    
    init(urlString: String) {
        imageModel = PlaceholderImageViewModel(urlString: urlString, cache: cache) // error: 'self' used before all stored properties are initialized
    }
    
    var body: some View {
        Text(/*@START_MENU_TOKEN@*/"Hello, World!"/*@END_MENU_TOKEN@*/)
    }
}

---

在初始化

MyImageCache

之前，您正在尝试初始化

Placeholder ImageViewModel

。解决此问题的一种方法是在

PlaceholderImageView

的调用者视图中创建

PlaceholderImageViewModel

，然后直接传递模型

struct PlaceholderImageViewSuperView: View {

    @Environment(\.MyImageCacheValue) var cache: MyImageCache

    var body: some View {
        NavigationLink("Go to image view", destination: PlaceholderImageView(imageModel: PlaceholderImageViewModel(urlString: urlString, cache: cache)))
    }
}

struct PlaceholderImageView: View {

    @ObservedObject var imageModel: PlaceholderImageViewModel

    var body: some View {
        Text("Any text here")
    }
}