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[英]NavigationView title doesn't appear when the views are in TabView in SwiftUI
[英]SwiftUI TabView and NavigationView Mixed - Pop To Root doesn't work
似乎很明显,当我同时使用 TabView 和 NavigationView - Pop To Root 不起作用。 这是我实现的两个测试代码。 一种同时具有 tabView 和 NavigationView,一种仅具有 Navigation View。
import SwiftUI
class Views: ObservableObject {
@Published var stacked = false
}
struct ContentView: View {
@ObservedObject var views = Views()
@State var selection: Int = 0
var body: some View {
NavigationView {
TabView(selection: $selection) {
ContentView2()
}
}
.environmentObject(views)
}
}
struct ContentView2: View {
@EnvironmentObject var views: Views
var body: some View {
NavigationLink(destination: ContentView3(), isActive: $views.stacked) {
Text("Go to View 2")
}
.isDetailLink(false)
}
}
struct ContentView3: View {
@EnvironmentObject var views: Views
var body: some View {
VStack {
Button("Pop to root") {
self.views.stacked = false
}
}
.navigationBarTitle("View 3")
}
}
TabView
括号,它就可以像魅力一样工作...... 当我尝试在 tabview 中弹出到 root 时,显示一条日志Trying to pop to a missing destination at /Library/Caches/com.apple.xbs/Sources/Monoceros/Monoceros-120/Shared/NavigationBridge_PhoneTV.swift:341
有没有人找到办法顶 TabView 和 NavigationView,并实现 pop To Root?
试试这个:
import SwiftUI
struct ContentView: View {
@State var isActive : Bool = false
var body: some View {
NavigationView {
NavigationLink(
destination: ContentView2(rootIsActive: self.$isActive),
isActive: self.$isActive
) {
Text("Hello, World!")
}
.isDetailLink(false)
.navigationBarTitle("Root")
}
}
}
struct ContentView2: View {
@Binding var rootIsActive : Bool
var body: some View {
NavigationLink(destination: ContentView3(rootIsActive: self.$rootIsActive)) {
Text("Hello, World #2!")
}
.isDetailLink(false)
.navigationBarTitle("Two")
}
}
struct ContentView3: View {
@Binding var rootIsActive : Bool
var body: some View {
NavigationLink(destination: ContentView4(shouldPopToRootView: self.$rootIsActive)) {
Text("Hello, World #3!")
}
.isDetailLink(false)
.navigationBarTitle("Three")
}
}
struct ContentView4: View {
@Binding var shouldPopToRootView : Bool
var body: some View {
VStack {
Text("Hello, World #4!")
Button (action: { self.shouldPopToRootView = false } ){
Text("Pop to root")
}
}.navigationBarTitle("Four")
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
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