SwiftUI 导航设置

一、导航跳转

• 页面A

import SwiftUI

struct NavJumpAView: View {
    
    @State var isNavPush = false
    
    var body: some View {
        NavigationView {
            VStack {
                NavigationLink(isActive: $isNavPush) {
                    NavJumpBView()
                } label: {
                }
                
                Button {
                    isNavPush = true
                } label: {
                    Text("导航跳转")
                }
            }
            .navigationBarTitle("页面A")
                .padding()
        }
    }
}
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• 页面B

struct NavJumpBView: View {
    
    @State var isNavPush = false
    
    var body: some View {
        NavigationView {
            VStack {
                Image(systemName: "globe")
                    .imageScale(.large)
                    .foregroundColor(.accentColor)
                Text("Hello, world!")
            }
            .padding()
        }
    }
}
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二、导航设置

struct NavJumpBView: View {
    @Environment(\.presentationMode) var presentationMode
    
    var body: some View {
        VStack {
            Image(systemName: "globe")
                .imageScale(.large)
                .foregroundColor(.accentColor)
            Text("Hello, world!")
        }
        .navigationBarTitle("页面B", displayMode: .inline) // 设置标题displayMode，默认的是：automatic（大标题）
        .navigationBarBackButtonHidden(true) // 隐藏系统的导航返回按钮
        .navigationBarItems(leading: Button(action: {// 自定义导航的返回按钮
            presentationMode.wrappedValue.dismiss() // 返回上级页面
        }, label: {
            if let resBundlePath = Bundle.main.path(forResource: "CommonResource", ofType: "bundle"),
               let resBundle = Bundle(path: resBundlePath) {
                Image("arrow_left_dark@2x", bundle: resBundle).background(Color.red) // 导航返回按钮图标
                Text("Back")
            } else {
                Text("Back")
            }
        }))
        .padding()
    }
}
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三、Present跳转（模态跳转）

struct NavJumpAView: View {
    
    @Environment(\.presentationMode) var presentationMode
    
    @State var isNavPush = false
    @State var isPresent = false
    
    var body: some View {
        NavigationView {
            VStack {
                NavigationLink(isActive: $isNavPush) {
                    NavJumpBView()
                } label: {
                }
                
                Button {
                    isNavPush = true
                } label: {
                    Text("导航跳转")
                }
                Spacer(minLength: 5).frame(height: 15)
                Button {
                    isPresent = true
                } label: {
                    Text("模态跳转")
                }
            }
            .navigationBarTitle("页面A", displayMode: .inline)
            .sheet(isPresented: $isPresent) {
                NavJumpBView()
            }
            .navigationBarItems(leading: Button(action: {
                presentationMode.wrappedValue.dismiss()
            }, label: {
                Text("Back").foregroundColor(.black)
            }))
                .padding()
                
        }
    }
}
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跳转全屏

// 只需要将上面的 “ sheet”替换成“ fullScreenCover”的方式就可以了
.fullScreenCover(isPresented: $isPresent, content: {
      PresentB()
  })
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四、返回页面

@Environment(\.presentationMode) var presentationMode

presentationMode.wrappedValue.dismiss() // 返回上级页面
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