Swiftui 快捷界面：更新导航栏颜色

目标：按按钮更新导航栏颜色

当前：导航栏颜色完全不变

尝试：我目前正在使用init（）设置NavBarIntColor&我也尝试过，但都不会根据需要进行更新

代码：

var navColor = Color.green

struct ContentView: View {
    @State var themeColor = Color.green
    @State var items = [0,1,2,3,4,5,6,7,8,9]
    @State var showSheet = false


init() {
    UINavigationBar.appearance().titleTextAttributes = [.foregroundColor: UIColor.black]
    UINavigationBar.appearance().barTintColor = UIColor(navColor)
    UINavigationBar.appearance().backgroundColor = UIColor(navColor)
}

var body: some View {
    NavigationView{
        List{
            ForEach(0..<items.count){ i in
                Text("Item: \(items[i])")
            }.listRowBackground(themeColor)
        }
        .navigationBarTitle("Theme", displayMode: .inline)
        .navigationBarItems(leading: Button(action: {
            showSheet.toggle()
        }, label: {
            Text("Sheet")
        })
        ,trailing: Button(action: {
            self.themeColor = Color(red: .random(in: 0...1), green: .random(in: 0...1), blue: .random(in: 0...1))
            navColor = Color(red: .random(in: 0...1), green: .random(in: 0...1), blue: .random(in: 0...1))
            items.shuffle()
        }, label: {
            Text("Random Color")
            
        }))
//            .background(NavigationConfigurator { nc in
//                nc.navigationBar.barTintColor = UIColor(navColor)
//                nc.navigationBar.titleTextAttributes = [.foregroundColor : UIColor.black]
//            })
        .sheet(isPresented: $showSheet, content: {
            popSheet()
        })
        
    }
}
}

struct popSheet: View {
var body: some View{
    NavigationView{
        Text("Hello")
            .navigationBarTitle("Sheet", displayMode: .inline)
    }
}
}

var navColor=Color.green
结构ContentView:View{
@状态变量themeColor=Color.green
@状态变量项=[0,1,2,3,4,5,6,7,8,9]
@状态变量showSheet=false
init（）{
UINavigationBar.appearance（）.titleTextAttributes=[.foregroundColor:UIColor.black]
UINavigationBar.appearance（）.barTintColor=UIColor（navColor）
UINavigationBar.appearance（）.backgroundColor=UIColor（navColor）
}
var body：一些观点{
导航视图{
名单{
ForEach（0..Void={uin}
func makeUIViewController（上下文：UIViewControllerRepresentableContext）->UIViewController{
UIViewController（）
}
func updateUIViewController（uViewController:uiViewController，上下文：UIViewControllerRepresentableContext）{
如果让nc=uiViewController.navigationController{
自配置（nc）
}
}
}

您可以使用

.id（主题颜色）

强制刷新

导航视图

以下是一个可能的解决方案：

struct ContentView: View {
    @State var themeColor = Color.green
    
    init() {
        updateNavigationBarColor()
    }
    
    var body: some View {
        NavigationView {
            VStack {
                Button("Change to blue") {
                    themeColor = .blue
                    updateNavigationBarColor()
                }
                Button("Change to red") {
                    themeColor = .red
                    updateNavigationBarColor()
                }
            }
            .navigationTitle("Title")
        }
        .id(themeColor)
    }
    
    func updateNavigationBarColor() {
        UINavigationBar.appearance().barTintColor = UIColor(themeColor)
        UINavigationBar.appearance().backgroundColor = UIColor(themeColor)
    }
}

struct ContentView: View {
    @State var themeColor = Color.green
    
    init() {
        updateNavigationBarColor()
    }
    
    var body: some View {
        NavigationView {
            VStack {
                Button("Change to blue") {
                    themeColor = .blue
                    updateNavigationBarColor()
                }
                Button("Change to red") {
                    themeColor = .red
                    updateNavigationBarColor()
                }
            }
            .navigationTitle("Title")
        }
        .id(themeColor)
    }
    
    func updateNavigationBarColor() {
        UINavigationBar.appearance().barTintColor = UIColor(themeColor)
        UINavigationBar.appearance().backgroundColor = UIColor(themeColor)
    }
}