SwiftUI中的Push
and等价于什么?Pop
view controller
问问题
1081 次
1 回答
1
根 :
window.rootViewController = UIHostingController(rootView: ContentView().environmentObject(Model()))
iOS 13.1 版:
class Model: ObservableObject {
@Published var pushed = false
}
struct ContentView: View {
@EnvironmentObject var model: Model
var body: some View {
NavigationView {
VStack {
Button("Push") {
self.model.pushed = true
}
NavigationLink(destination: DetailView(), isActive: $model.pushed) { EmptyView() }
}
}
}
}
struct DetailView: View {
@EnvironmentObject var model: Model
var body: some View {
Button("Bring me Back") {
self.model.pushed = false
}
}
}
删除默认的后退按钮并添加我们自己的按钮将让我们通过,直到苹果修复错误。
class Model: ObservableObject {
@Published var pushed = false
}
struct ContentView: View {
@EnvironmentObject var model: Model
var body: some View {
NavigationView {
VStack {
Button("Push") {
self.model.pushed = true
}
NavigationLink(destination: DetailView(), isActive: $model.pushed) { EmptyView() }
}
}
}
}
struct DetailView: View {
@EnvironmentObject var model: Model
var body: some View {
Button("Bring me Back") {
self.model.pushed = false
}
.navigationBarBackButtonHidden(true)
.navigationBarItems(leading: MyBackButton(label: "Back!") {
self.model.pushed = false
})
}
}
struct MyBackButton: View {
let label: String
let closure: () -> ()
var body: some View {
Button(action: { self.closure() }) {
HStack {
Image(systemName: "chevron.left")
Text(label)
}
}
}
}
于 2019-12-30T08:30:56.823 回答