Swiftui 工作表关闭后导航栏按钮不工作。航空包装？
我正在开发一个SwiftUI应用程序，我有一个Swiftui 工作表关闭后导航栏按钮不工作。航空包装？,swiftui,swiftui-navigationview,Swiftui,Swiftui Navigationview,我正在开发一个SwiftUI应用程序，我有一个NavigationView，导航栏上有一些按钮。问题是，在关闭一张完整的页面后（由按钮触发，而不是在导航栏中），这些按钮停止工作 我尝试了以下方法，但一些TestFlight用户表示问题仍然存在（我自己无法重现）： 为每个按钮添加一个id，并在关闭后更改它（我甚至将其添加到工具栏），以强制重新绘制 为按钮和导航栏添加高度 将@Environment（\.presentationMode）var presentationMode:Binding添加到
NavigationView@Environment（\.presentationMode）var presentationMode:Binding导航项struct PListView:View{
//https://stackoverflow.com/questions/58837007/multiple-sheetispresented-doesnt-work-in-swiftui
枚举ActiveSheetProjectList:可识别{
案例帮助，设置
变量id:Int{
哈希值
}
}
枚举ActiveFullSheetProjectList:可识别{
case addProject，quickCount
变量id:Int{
哈希值
}
}
@观察对象变量视图模型：ProjectListViewModel
@状态变量presentingdeletprojectsheet=false
@状态变量itemsToDelete:[UUID]？
@状态变量activeSheet:ActiveSheetProjectList？
@状态变量activeFullSheet:ActiveFullSheetProjectList？
@ObservedObject变量设置：设置
@环境（\.presentationMode）变量presentationMode:绑定
初始化（设置：设置）{
self.viewModel=ProjectListViewModel（）
self.settings=设置
//https://medium.com/@francisco.gindre/customization-swiftui-navigation-bar-8369d42b8805
//这与直接操作代理不同
让外观=UINavigationBarAppearance（）
//这将覆盖您先前设置的所有内容。
外观。配置为透明背景（）
appearance.backgroundColor=UIColor（Color.navBar）
//这只适用于大标题
外观.largeTitleTextAttributes=[
.font:UIFont.systemFont（大小：20），
NSAttributeString.Key.foregroundColor:UIColor（Color.smallTextMain）
]
//这只适用于小标题
外观.titleTextAttributes=[
.font:UIFont.systemFont（大小：20），
NSAttributeString.Key.foregroundColor:UIColor（Color.smallTextMain）
]
//在下面的两行中，请确保应用了正确的样式
UINavigationBar.appearance（）.scrollEdgeAppearance=外观
UINavigationBar.appearance（）.standardAppearance=外观
//UINavigationBarAppearance上不存在此属性
//由于某种原因，您必须将其保留到最后
UINavigationBar.appearance（）.tintColor=UIColor（Color.smallTextMain）
}
var body：一些观点{
导航视图{
ZStack{
Color.background.edgesIgnoringSafeArea（.all）
VStack{
名单{
ForEach（projects）{projectin
NavigationLink（目标：ProjectView（项目：项目，设置：设置，viewModel:ProjectListViewModel（），viewContext:viewContext）
.environmentObject（自我设置）
{
HStack{
文本（project.name？？？）.font（.headline）.填充（.bottom，5）.填充（.top，5）
}
}
.listRowInsets（.init（顶部：10，前导：3，底部：10，尾随：3））
.accessibilityHint（文本（NSLocalizedString（“查看项目详细信息”，注释：））
}
.onDelete（执行：{indexSet in
presentingDeleteProjectSheet=true
itemsToDelete=indexSet.map{projects[$0].id！}
})
.listRowBackground（颜色为浅灰色）
.填充（0）
.actionSheet（显示：$presentingDeleteProjectSheet）{
var name=NSLocalizedString（“项目”，注释：“通用标签”）
如果let id=itemsToDelete？。首先{
name=projects.first（其中：{$0.id==id}）？.name？？“
}
返回操作表（标题：文本（NSLocalizedString（String.localizedStringWithFormat（“Delete%@”，name），注释：“警报标题”）），消息：文本（NSLocalizedString（“删除项目无法撤消”，注释：“删除警报消息”）），按钮：[
.破坏性（文本（NSLocalizedString（“删除”，注释：“按钮标签”））{
如果itemsToDelete！=ni
struct PListView: View {
//https://stackoverflow.com/questions/58837007/multiple-sheetispresented-doesnt-work-in-swiftui
enum ActiveSheetProjectList: Identifiable {
case help, settings
var id: Int {
hashValue
}
}
enum ActiveFullSheetProjectList: Identifiable {
case addProject, quickCount
var id: Int {
hashValue
}
}
@ObservedObject var viewModel : ProjectListViewModel
@State var presentingDeleteProjectSheet = false
@State var itemsToDelete : [UUID]?
@State var activeSheet: ActiveSheetProjectList?
@State var activeFullSheet : ActiveFullSheetProjectList?
@ObservedObject var settings : Settings
@Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>
init(settings: Settings) {
self.viewModel = ProjectListViewModel()
self.settings = settings
//https://medium.com/@francisco.gindre/customizing-swiftui-navigation-bar-8369d42b8805
// this is not the same as manipulating the proxy directly
let appearance = UINavigationBarAppearance()
// this overrides everything you have set up earlier.
appearance.configureWithTransparentBackground()
appearance.backgroundColor = UIColor(Color.navBar)
// this only applies to big titles
appearance.largeTitleTextAttributes = [
.font : UIFont.systemFont(ofSize: 20),
NSAttributedString.Key.foregroundColor : UIColor(Color.smallTextMain)
]
// this only applies to small titles
appearance.titleTextAttributes = [
.font : UIFont.systemFont(ofSize: 20),
NSAttributedString.Key.foregroundColor : UIColor(Color.smallTextMain)
]
//In the following two lines you make sure that you apply the style for good
UINavigationBar.appearance().scrollEdgeAppearance = appearance
UINavigationBar.appearance().standardAppearance = appearance
// This property is not present on the UINavigationBarAppearance
// object for some reason and you have to leave it til the end
UINavigationBar.appearance().tintColor = UIColor(Color.smallTextMain)
}
var body: some View {
NavigationView {
ZStack {
Color.background.edgesIgnoringSafeArea(.all)
VStack {
List {
ForEach(projects) { project in
NavigationLink(destination: ProjectView(project: project, settings: settings, viewModel: ProjectListViewModel(), viewContext: viewContext)
.environmentObject(self.settings)
{
HStack {
Text(project.name ?? "").font(.headline).padding(.bottom, 5).padding(.top, 5)
}
}
.listRowInsets(.init(top: 10, leading: 3, bottom: 10, trailing: 3))
.accessibilityHint(Text(NSLocalizedString("View project details", comment: "")))
}
.onDelete(perform: { indexSet in
presentingDeleteProjectSheet = true
itemsToDelete = indexSet.map { projects[$0].id! }
})
.listRowBackground(Color.lightGray)
.padding(0)
.actionSheet(isPresented: $presentingDeleteProjectSheet) {
var name = NSLocalizedString("Project", comment: "Generic label")
if let id = itemsToDelete?.first {
name = projects.first(where: {$0.id == id})?.name ?? ""
}
return ActionSheet(title: Text(NSLocalizedString(String.localizedStringWithFormat("Delete %@", name), comment: "alert title")), message: Text(NSLocalizedString("Deleting a project can't be undone", comment: "Deleting alert message")), buttons: [
.destructive(Text(NSLocalizedString("Delete", comment: "Button label"))) {
if itemsToDelete != nil {
viewModel.deleteProjects(projects: activeProjectsDateCreated, ids: itemsToDelete!)
}
},
.cancel({itemsToDelete?.removeAll()})
])
}
}
.padding(0)
.onAppear(perform: {
UITableView.appearance().backgroundColor = UIColor(Color.lightGray)
UITableViewCell.appearance().selectionStyle = .none
})
}
}
}
.fullScreenCover(item: $activeFullSheet, content: { item in
switch item {
case .quickCount :
// THIS IS THE SHEET THAT CAUSES THE ISSUES
QuickCountView(viewModel: CounterViewModel(counter: viewModel.getScratchCounter(projects: quickCountProject), sound: settings.sound, showTotal: settings.showTotal, viewContext: viewContext))
.environmentObject(settings)
case .addProject:
// No problems after dismissing this one
AddEditProjectView(viewModel: AddEditProjectViewModel(project : nil, startAt: settings.startNumber, viewContext: viewContext), isNew: true, isEditing: .constant(true))
.environmentObject(settings)
}
})
Button(action: { activeFullSheet = .quickCount }, label: {
Text(NSLocalizedString("Quick Count +", comment: "Button label"))
.accessibilityLabel(NSLocalizedString("Quick count", comment: ""))
})
.buttonStyle(CustomButton(style: .button, size: .large))
.padding()
.sheet(item: $activeSheet) { item in
switch item {
case .help:
HelpView()
case .settings:
SettingsView()
.environmentObject(settings)
}
}
}
.navigationBarTitleDisplayMode(.inline)
.toolbar {
ToolbarItemGroup(placement: .navigationBarLeading) {
HStack {
Button(action: {
self.activeSheet = .settings
}) {
Image(systemName: "gearshape.fill")
.font(Font.system(size: 28, weight: .medium, design: .rounded))
.foregroundColor(Color.main)
.accessibilityLabel(Text(NSLocalizedString("Settings", comment: "a11y label")))
.frame(height: 96, alignment: .trailing)
}
Button(action: {
self.activeSheet = .help
}) {
Image(systemName: "questionmark")
.font(Font.system(size: 28, weight: .semibold, design: .rounded))
.foregroundColor(Color.main)
.accessibilityLabel(Text(NSLocalizedString("Help", comment: "a11y label")))
.frame(height: 96, alignment: .trailing)
}
}
}
ToolbarItemGroup(placement: .navigationBarTrailing) {
HStack {
Button(action: { activeFullSheet = .addProject }) {
Image(systemName: "plus")
.font(Font.system(size: 30, weight: .semibold))
.foregroundColor(Color.main)
.accessibilityLabel(Text(NSLocalizedString("Add a Project", comment: "a11y label")))
.frame(height: 96, alignment: .trailing)
}
Button(action: {
self.isEditing.toggle()
}) {
Image(systemName: isEditing ? "xmark" : "pencil")
.font(Font.system(size: 28, weight: .black))
.foregroundColor(activeProjectsDateCreated.count >= 1 ? Color.main : Color.gray)
.accessibilityLabel(Text(NSLocalizedString("Edit Project List", comment: "a11y label")))
.frame(height: 96, alignment: .trailing)
}.disabled(activeProjectsDateCreated.count < 1)
.frame(height: 96, alignment: .trailing)
}
}
}
}
}