什么相当于 SwiftUI 中 View Controller
的Push
和Pop
?
最佳答案
根:
window.rootViewController = UIHostingController(rootView: ContentView().environmentObject(Model()))
iOS 版本 13.1:
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后退按钮将让我们顺利通过,直到 Apple 修复该错误。
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)
}
}
}
}
关于swift - SwiftUI 中的推送、弹出 View Controller 等效项,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59527639/