我有状态对象，它们是从我的三个视图中的一个文件选择器设置的，比如在`View1`上。
```swift
@State private var fileName : String = ""
@State private var listFileURLs = [URL]()
@State private var selectedFileIndex = 0

if (showFirstView) {
    View1()
} else if (showSecondView) {
    View2()
}

@State static private var fileName : String = ""
@State static private var listFileURLs = [URL]()
@State static private var selectedFileIndex = 0

<details>
<summary>英文:</summary>
I have state objects which are set from a file picker on one of my three views, let&#39;s say on `View1`. 

When I switch over to another view and return, the state objects appear to be reset. The views are switched by an if-else clause based on button states

I tried turning the variables static, 

But that strangely resulted in these variables not being updated when I launched the file picker.
I can't move these variables to the super View, because they are set by controls in View1. 
How should I proceed?
</details>
# 答案1
**得分**: 1
可能的问题是每次更改 `showFirstView` 时都会创建一个新的视图。
您可以将 `@State` 变量从子视图移动到父视图，像这样：
```swift
import SwiftUI
struct ContentView: View {
    @State private var showingFirstView = false
    @State private var state1 = "文本"
    @State private var state2 = "文本2"
    var body: some View {
        VStack {
            if showingFirstView {
                View1(state1: $state1)
            } else {
                View2(state2: $state2)
            }
            Button("切换视图") {
                showingFirstView.toggle()
            }
        }
        .padding()
    }
}
struct View1: View {
    @Binding var state1: String
    var body: some View {
        VStack {
            TextEditor(text: $state1)
        }
        .padding()
    }
}
struct View2: View {
    @Binding var state2: String
    var body: some View {
        VStack {
            TextEditor(text: $state2)
        }
        .padding()
    }
}