在多个实例中使用 .onReceive 代码 - SwiftUI

Question

我有这个代码：

VStack {
            if viewRouter.currentPage == "onboardingView" {
                OnboardingView()
            } else if viewRouter.currentPage == "homeView" {
                TabView {
                    HomeView(mealsController: self.mealsController)
                        .tabItem {
                            Image(systemName: "house")
                            Text("Menu")
                    }
                    SettingsView(mealsController: self.mealsController)
                        .tabItem {
                            Image(systemName: "slider.horizontal.3")
                            Text("Settings")
                    }
                }
                .accentColor(Color(getThemeConstants.accentThemeColor))
            }
        }

在我的底部：

.onReceive(NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification)) { _ in
...
}
.onAppear() {
...
}

在.onReceive内部我有一堆代码需要在.onAppear上重用，我该如何重用这种代码？

Answer 1

只需在一些私有函数中提取公共代码并从两个修饰符中调用它，如下所示

.onReceive(NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification)) { _ in
   self.handlerFunction()
}
.onAppear() {
   self.handlerFunction()
}

...

private func handlerFunction() {
   // move common code here
}