Class 为什么我的观察对象似乎被一个特定的视图打破了?
我创建了一个类,用于将跟踪a保留在实际视图中(一个简单的ObserveObject字符串): 我创建了一个简单的自定义选项卡视图,它可以很好地处理以下问题:Class 为什么我的观察对象似乎被一个特定的视图打破了?,class,swiftui,observableobject,Class,Swiftui,Observableobject,我创建了一个类,用于将跟踪a保留在实际视图中(一个简单的ObserveObject字符串): 我创建了一个简单的自定义选项卡视图,它可以很好地处理以下问题: import SwiftUI struct Test2CustomTabView: View { @ObservedObject var viewRouter = ViewRouter() var body: some View { GeometryReader { geometry in
import SwiftUI
struct Test2CustomTabView: View {
@ObservedObject var viewRouter = ViewRouter()
var body: some View {
GeometryReader { geometry in
VStack {
Spacer()
if self.viewRouter.currentView == "Home" {
Home()
} else if self.viewRouter.currentView == "Messages" {
Messages()
}
Spacer()
HStack {
VStack {
Image(systemName: "house")
Text("Home")
.font(.caption)
}.frame(width: geometry.size.width/2, alignment: .center)
.offset(y: -15)
.onTapGesture {
self.viewRouter.currentView = "Home"
}
VStack {
Image(systemName: "envelope")
Text("Messages")
.font(.caption)
}.frame(width: geometry.size.width/2, alignment: .center)
.offset(y: -15)
.onTapGesture {
self.viewRouter.currentView = "Messages"
}
}.frame(height: 85)
.foregroundColor(.white)
.background(Color(#colorLiteral(red: 0.259467423, green: 0.5342320204, blue: 0.7349982858, alpha: 1))) // On utilise ici extension Color plus bas
}
}
.edgesIgnoringSafeArea(.bottom)
}
}
我想简化代码,因此创建了以下视图:
import SwiftUI
struct Test2CustomTabViewItem: View {
@ObservedObject var viewRouter = ViewRouter()
var systemName:String
var viewName:String
let screenSize: CGRect = UIScreen.main.bounds
var body: some View {
VStack {
Image(systemName: systemName)
Text("Home")
.font(.caption)
}.frame(width: screenSize.width/2, alignment: .center)
.offset(y: -15)
.onTapGesture {
self.viewRouter.currentView = self.viewName
}
}
}
struct Test2CustomTabViewItem_Previews: PreviewProvider {
static var previews: some View {
Test2CustomTabViewItem(systemName: "house", viewName: "Home")
}
}
现在我使用Test2CustomTabView,如下所示:
import SwiftUI
struct Test2CustomTabView: View {
@ObservedObject var viewRouter = ViewRouter()
var body: some View {
GeometryReader { geometry in
VStack {
Spacer()
if self.viewRouter.currentView == "Home" {
Home()
} else if self.viewRouter.currentView == "Messages" {
Messages()
}
Spacer()
HStack {
Test2CustomTabViewItem(systemName: "house", viewName: "Home")
Test2CustomTabViewItem(systemName: "envelope", viewName: "Messages")
}.frame(height: 85)
.foregroundColor(.white)
.background(Color(#colorLiteral(red: 0.259467423, green: 0.5342320204, blue: 0.7349982858, alpha: 1))) // On utilise ici extension Color plus bas
}
}
.edgesIgnoringSafeArea(.bottom)
}
}
struct Test2CustomTabView_Previews: PreviewProvider {
static var previews: some View {
Test2CustomTabView()
}
}
但是现在,当我单击自定义选项卡视图项时,视图不会刷新,ObserveObject中的更改不会刷新视图,我不明白为什么
有什么想法吗
谢谢在您的代码中,每个视图都有自己的
视图路由器
实例。将其从构造函数传递到Test2CustomTabViewItem
视图或作为environmentObject
:
struct Test2CustomTabViewItem: View {
@ObservedObject var viewRouter: ViewRouter
var systemName:String
var viewName:String
...
}
struct Test2CustomTabView: View {
@ObservedObject var viewRouter = ViewRouter()
...
Test2CustomTabViewItem(viewRouter: self.viewRouter, systemName: "house", viewName: "Home")
Test2CustomTabViewItem(viewRouter: self.viewRouter, systemName: "envelope", viewName: "Messages")
...
}
struct Test2CustomTabViewItem: View {
@ObservedObject var viewRouter: ViewRouter
var systemName:String
var viewName:String
...
}
struct Test2CustomTabView: View {
@ObservedObject var viewRouter = ViewRouter()
...
Test2CustomTabViewItem(viewRouter: self.viewRouter, systemName: "house", viewName: "Home")
Test2CustomTabViewItem(viewRouter: self.viewRouter, systemName: "envelope", viewName: "Messages")
...
}