[移动开发]SwiftUI NavigationView页面之间传参数

在做SwiftUI开发时，想要数据在两个页面View之间传递，通常采用NavigationView加NavigationLink跳转的方式。

下面我将展示页面传递字符类型参数String以及对象类型参数ObservedObjec

?首先定义对象Al lSearchModel

import Foundation
class AllSearchModel: ObservableObject {
    @Published var searchkey: String
    @Published var sortA: String
    @Published var sortB: String
    @Published var sortC: String
    @Published var orderBy: String
    @Published var orderType: String
    @Published var searchResultKey: String
    
    init(searchkey: String, sortA: String, sortB: String, sortC: String, orderBy: String, orderType: String,searchResultKey: String) {
        self.searchkey = searchkey
        self.sortA = sortA
        self.sortB = sortB
        self.sortC = sortC
        self.orderBy = orderBy
        self.orderType = orderType
        self.searchResultKey=searchResultKey
    }
}

页面?TestView

import SwiftUI

struct TestView: View {
    @State var viewname:String = "12345"  //定义字符串类型参数
    @ObservedObject var allsearchmodel:AllSearchModel = AllSearchModel(searchkey: "", sortA: "", sortB: "", sortC: "", orderBy: "", orderType: "",searchResultKey:"")//定义对象参数
    var body: some View {
        NavigationView{
            VStack{
                TextField("检索词", text: $allsearchmodel.searchkey)//定义输入框，值绑定对象中的属性 也可以绑定字符串
                    .border(Color.black)
                NavigationLink(destination:Test1View(viewname:viewname ,allsearchmodel:allsearchmodel)){//定义跳转页面，将要传的值放入视图定义中，多个参数，隔开
                    Text("跳转到第二个页面")
                }
            }
            
        }
    }
}

struct TestView_Previews: PreviewProvider {
    static var previews: some View {
        TestView()
    }
}

第二个接收页面 ?TestView1

import SwiftUI

struct Test1View: View {
    @State var viewname:String=""
    @ObservedObject var allsearchmodel:AllSearchModel=AllSearchModel(searchkey: "", sortA: "", sortB: "", sortC: "", orderBy: "", orderType: "",searchResultKey:"")
    var body: some View {
        VStack{
            Text("参数1是：\(allsearchmodel.searchkey)")
            Text("参数2是：\(viewname)")
        }
        
    }
}

struct Test1View_Previews: PreviewProvider {
    static var previews: some View {
        Test1View()
    }
}