Question

学习SwiftUI。试图从导航栏中单击导航到新视图。
下面的示例代码：

var body: some View {
    NavigationView {
        List(0...< 5) { item in
            NavigationLink(destination: EventDetails()){
                EventView()
            }
        }
        .navigationBarTitle("Events")
            .navigationBarItems(trailing:
                NavigationLink(destination: CreateEvent()){
                    Text("Create Event")
                }
        )
    }
}

Answer 1

三个步骤对我有用：首先添加一个@State Bool来跟踪新视图的显示：

@State var showNewView = false

添加带有设置上述属性的操作的navigationBarItem：

 .navigationBarItems(trailing:
        Button(action: {
            self.showNewView = true
        }) {
            Text("Go To Destination")
        }
    )

最后在您的视图代码中的某个位置添加一个导航链接（这还取决于在视图堆栈中的某个位置具有一个NavigationView）

NavigationLink(
            destination: MyDestinationView(),
            isActive: $showNewView
        ) {
            EmptyView()
        }.isDetailLink(false)

Answer 2

这对我有用：

    .navigationBarItems(trailing: HStack { AddButton(destination: EntityAddView()) ; EditButton() } )

位置：

struct AddButton<Destination : View>: View {

    var destination:  Destination

    var body: some View {
        NavigationLink(destination: self.destination) { Image(systemName: "plus") }
    }
}

Answer 3

当前是一个iOS13错误：https://forums.developer.apple.com/thread/124757

可以在这里找到“分类”解决方法：https://stackoverflow.com/a/57837007/4514671

这是我的解决方案： MasterView-

import SwiftUI

struct MasterView: View {

    @State private var navigationSelectionTag: Int? = 0

    var body: some View {
        NavigationView {
            VStack {
                NavigationLink(destination: DestinationView(), tag: 1, selection: self.$navigationSelectionTag) {
                    EmptyView()
                }
                Spacer()
            }
            .navigationBarTitle("Master")
            .navigationBarItems(trailing: Button(action: {
                self.navigationSelectionTag = 1
            }, label: {
                Image(systemName: "person.fill")
            }))
        }
    }
}

struct MasterView_Previews: PreviewProvider {
    static var previews: some View {
        MasterView()
    }
}

和DetailsView-

import SwiftUI

struct DetailsView: View {
    var body: some View {
        Text("Hello, Details!")
    }
}

struct DetailsView_Previews: PreviewProvider {
    static var previews: some View {
        DetailsView()
    }
}

Answer 4

将NavigationLink放入按钮的标签中。

.navigationBarItems(
      trailing: Button(action: {}, label: {
         NavigationLink(destination: NewView()) {
              Text("")
         }
      }))

如何从NavigationBar按钮导航到新视图，在SwiftUI中单击

4 个答案: