相关疑难解决方法(0)

在这种特定情况下，当我尝试更改@EnvironmentObject的时@Published var，我发现该视图并没有立即失效并立即更新。相反，仅在离开模态并返回后，才会反映对变量的更改。

import SwiftUI

final class UserData: NSObject, ObservableObject  {
    @Published var changeView: Bool = false
}

struct MasterView: View {
    @EnvironmentObject var userData: UserData
    @State var showModal: Bool = false

    var body: some View {
        Button(action: { self.showModal.toggle() }) {
            Text("Open Modal")
        }.sheet(isPresented: $showModal, content: {
            Modal(showModal: self.$showModal)
                .environmentObject(self.userData)
        } )
    }
}

struct Modal: View {
    @EnvironmentObject var userData: UserData
    @Binding var showModal: Bool

    var body: some View {
        VStack {
            if userData.changeView { …