使用 SwiftUI 在导航栏内调用模态视图时，我在关闭模态视图时遇到问题

Question

点击导航栏中的 "Show Modal" 按钮，显示模态。但是，当 "Dismiss" 按钮被点击时，模式永远不会显示。如果滑动模式，则不会发生错误。

import SwiftUI

struct ContentView: View {
    @State var showModal = false

    var body: some View {
        NavigationView {
            Text("Hello, World!")
                .navigationBarItems(trailing: Button("Show Modal") {

                    self.showModal = true
                    })
        }.sheet(isPresented: self.$showModal) {
            Modal()
        }
    }
}

struct Modal: View {
    @Environment(\.presentationMode) var mode

    var body: some View {
        NavigationView {
            Text("Modal")
                .navigationBarItems(leading: Button("Dismiss") {
                    self.mode.wrappedValue.dismiss()
                })
        }
    }
}

Answer 1

您需要关闭 showModal 状态。这样的事情会起作用。我合并了两个视图以快速演示

import SwiftUI

struct ContentView: View {
    @State var showModal = false
    @Environment(\.presentationMode) var mode

    var body: some View {
        NavigationView {
            Text("Hello, World!")
                .navigationBarItems(trailing: Button("Show Modal") {

                    self.showModal.toggle()
                    })
        }.sheet(isPresented: self.$showModal) {
            NavigationView {
                Text("Modal")
                    .navigationBarItems(leading: Button("Dismiss") {
                        self.showModal.toggle()
                        self.mode.wrappedValue.dismiss()

                    })
            }
        }
    }
}

使用 SwiftUI 在导航栏内调用模态视图时，我在关闭模态视图时遇到问题

I'm having problem dismissing a modal view when calling it inside a navigation bar with SwiftUI

navigation

binding

swift

swiftui