跟踪和修复swiftUI崩溃(saw PreferenceKeys，预期ViewList)？
跟踪和修复swiftUI崩溃(saw PreferenceKeys，预期ViewList)？
提问于 2021-06-09 13:56:09
当我在我的应用程序中快速移动时，我会崩溃(打开一个子页面，然后返回到着陆处)。
来自TestFlight的App崩溃日志：
Thread 0 name:
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x00000001c87ff334 __pthread_kill + 8
1 libsystem_pthread.dylib 0x00000001e6221aa0 pthread_kill + 272 (pthread.c:1392)
2 libsystem_c.dylib 0x00000001a3b86c10 __abort + 116 (abort.c:147)
3 libsystem_c.dylib 0x00000001a3b86b9c abort + 116 (abort.c:118)
4 AttributeGraph 0x00000001c3c31a6c AG::precondition_failure(char const*, ...) + 192 (ag-util.cc:51)
5 AttributeGraph 0x00000001c3c1f4cc AG::Graph::input_value_ref_slow(AG::data::ptr<AG::Node>, AG::AttributeID, unsigned int, AGSwiftMetadata const*, bool*, long) + 828 (ag-graph.cc:0)
6 AttributeGraph 0x00000001c3c3109c AGGraphGetValue + 232 (ag-graph-impl.h:43)
7 SwiftUI 0x00000001a140bbc4 AnyViewList.Item.list.getter + 72 (<compiler-generated>:0)
8 SwiftUI 0x00000001a140b5e8 AnyViewList.updateValue() + 512 (AnyView.swift:333)
9 SwiftUI 0x00000001a0f1f0c4 partial apply for specialized implicit closure #2 in implicit closure #1 in closure #1 in closure #1 in Attribute.init<A>(_:) + 24 (<compiler-generated>:0)
10 AttributeGraph 0x00000001c3c1977c AG::Graph::UpdateStack::update() + 492 (ag-closure.h:108)
11 AttributeGraph 0x00000001c3c19bb4 AG::Graph::update_attribute(AG::data::ptr<AG::Node>, bool) + 332 (ag-graph-update.cc:563)
12 AttributeGraph 0x00000001c3c22dc4 AG::Subgraph::update(unsigned int) + 884 (ag-subgraph.cc:613)
13 SwiftUI 0x00000001a1735188 GraphHost.runTransaction() + 172 (GraphHost.swift:491)
14 SwiftUI 0x00000001a11bd184 ViewGraph.updateOutputs(at:) + 108 (ViewGraph.swift:404)
15 SwiftUI 0x00000001a1681688 closure #1 in ViewRendererHost.render(interval:updateDisplayList:) + 1508 (ViewRendererHost.swift:188)
16 SwiftUI 0x00000001a1677bdc ViewRendererHost.render(interval:updateDisplayList:) + 308 (ViewRendererHost.swift:0)
17 SwiftUI 0x00000001a1813920 _UIHostingView.layoutSubviews() + 200 (UIHostingView.swift:1557)
18 SwiftUI 0x00000001a1813954 @objc _UIHostingView.layoutSubviews() + 28 (<compiler-generated>:0)
19 UIKitCore 0x000000019d728c20 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2576 (UIView.m:17543)
20 QuartzCore 0x000000019dbaf91c -[CALayer layoutSublayers] + 308 (CALayer.mm:10147)
21 QuartzCore 0x000000019dbafe00 CA::Layer::layout_if_needed(CA::Transaction*) + 548 (CALayer.mm:10014)
22 QuartzCore 0x000000019dbc4a38 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 144 (CALayer.mm:2485)
23 QuartzCore 0x000000019db06ca8 CA::Context::commit_transaction(CA::Transaction*, double, double*) + 500 (CAContextInternal.mm:2510)
24 QuartzCore 0x000000019db32eb8 CA::Transaction::commit() + 684 (CATransactionInternal.mm:449)
25 QuartzCore 0x000000019db341e4 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 96 (CATransactionInternal.mm:932)
26 CoreFoundation 0x000000019a77f440 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 36 (CFRunLoop.c:1799)
27 CoreFoundation 0x000000019a779564 __CFRunLoopDoObservers + 572 (CFRunLoop.c:1912)
28 CoreFoundation 0x000000019a779b10 __CFRunLoopRun + 1052 (CFRunLoop.c:2953)
29 CoreFoundation 0x000000019a7791c0 CFRunLoopRunSpecific + 600 (CFRunLoop.c:3242)
30 GraphicsServices 0x00000001b1d61734 GSEventRunModal + 164 (GSEvent.c:2259)
31 UIKitCore 0x000000019d1e77e4 -[UIApplication _run] + 1072 (UIApplication.m:3269)
32 UIKitCore 0x000000019d1ed054 UIApplicationMain + 168 (UIApplication.m:4740)
33 SwiftUI 0x00000001a16bd350 closure #1 in KitRendererCommon(_:) + 112 (UIKitApp.swift:34)
34 SwiftUI 0x00000001a16bd2dc runApp<A>(_:) + 224 (<compiler-generated>:0)
35 SwiftUI 0x00000001a11b5b4c static App.main() + 144 (App.swift:113)
36 xxx 0x0000000102e05244 $main + 28 (<compiler-generated>:19)
37 xxx 0x0000000102e05244 main + 40 (REST_API.swift:0)
38 libdyld.dylib 0x000000019a435cf8 start + 4主着陆界面：
导入SwiftUI
struct w_landing: View {
@State var daily_feed:CAT_BITE?
@EnvironmentObject var env:Env
@State var page:pages!
public static var isAnimated:Bool = false
let timer = Timer.publish(every: 1, on: .current, in: .common).autoconnect()
@ViewBuilder
var body: some View {
NavigationView {
ZStack {
deepLink(page: $page).onChange(of: env.open_page) { (Equatable) in
DispatchQueue.main.async {
page = Equatable
}
}.id("deep_link")
Color.black
//Backgroud
Image("background_landing")
.resizable()
.aspectRatio(contentMode: .fill)
.frame(width : UIScreen.main.bounds.width,
height : UIScreen.main.bounds.height)
.ignoresSafeArea(.all)
.onAppear(){
self.parseNotification()
}
//Grid
VStack {
//DAILY FEED BUTTON
if ( self.daily_feed != nil ){
Button(action: {
page = pages.withLabel( self.daily_feed!.type)
} ){ catBite( i:0, dto : self.daily_feed!).environmentObject(env) }
}
//LIST GRID
LazyVGrid(columns: [GridItem(.flexible()),
GridItem(.flexible())]
,spacing: 8){
if Env.sharedInstance.cats.count > 0 {
ForEach(0...Env.sharedInstance.cats.count - 1 , id : \.self) {i in
if Env.sharedInstance.cats[i].type != "DAILY_FEED" {
Button(action: {
page = pages.withLabel( Env.sharedInstance.cats[i].type)
}) {
catBite( i:i - 1, dto : Env.sharedInstance.cats[i] )
.environmentObject(env)
}
}
}
}
}
Spacer()
}.padding(.top, Env.sharedInstance.hasNotch ? 80 : 50)
.padding([.leading,.trailing] , 20)
.id("the_main_list")
}.id("landing")
.navigationBarColor( .clear, textColor: .white )
.accentColor(.white)
.navigationBarTitleDisplayMode(.inline)
.onAppear(){
DispatchQueue.main.asyncAfter(deadline: .now() + 0.7) {
w_landing.isAnimated = true
}
//CheckIn
NF_APP.checkIn {
self.rebuild()
} onFail: {
}
}
.onReceive(NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification), perform: { _ in
parseNotification()
})
.onReceive(NotificationCenter.default.publisher(for: NSNotification.Name("pushRecieved")), perform: { _ in
parseNotification()
})
.onReceive(timer) { time in
env.seconds += 1
}
.navigationBarItems(leading:
Button(action : {
DispatchQueue.main.async{
self.page = .SHARE_APP
}
} ){
VStack(spacing: 0){
Image( "icon-invite")
.resizable()
.aspectRatio(contentMode: .fit)
.foregroundColor(.white)
.frame(width : 28, height : 28)
Text("Invite Friends")
.foregroundColor(.white)
.font(Font.custom("Poppins-Light", fixedSize: 8))
}
}
, trailing:
HStack(spacing : 20){
Button(action : { page = .NOTIFICATIONS} ){
Image(systemName: "bell.fill")
.resizable()
.aspectRatio(contentMode: .fit)
.foregroundColor(.white)
.frame(width : 25, height : 25)
}
Button(action : { page = .SETTINGS} ){
Image(systemName: "gearshape.fill")
.resizable()
.aspectRatio(contentMode: .fit)
.foregroundColor(.white)
.frame(width : 25, height : 25)
}
}
).toolbar {
//LOGO mid
ToolbarItem(placement: .principal) {
Image("logo-splash").resizable()
.aspectRatio(contentMode: .fit)
.frame(width : 140, height: 50)
}
}
}.navigationViewStyle(StackNavigationViewStyle())
}
fileprivate func parseNotification(){
//Open deep link notification if exsits
if push_payload != nil {
print("[PUSH] payload \(String(describing: push_payload))")
if let custom_data:[String:Any] = push_payload["custom_data"] as? [String:Any] {
push_payload = nil
let open_page:String = custom_data["open_page"] as? String ?? ""
print("[PUSH] open page = \(open_page)")
if open_page != "" {
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
page = pages.withLabel(open_page)
}
}
}else{
print("[PUSH] No custom data found")
}
}else{
print("[PUSH] Payload was nil")
}
}
fileprivate func rebuild(){
//Cats already loded
if Env.sharedInstance.cats.count > 0 {
return
}
if let _cats:[Any] = Env.sharedInstance.checkin?.payload!["categories"] as? [Any] {
Env.sharedInstance.cats = []
for cat in _cats {
guard let cat = cat as? [String:Any] else {
continue
}
Env.sharedInstance.cats.append(CAT_BITE(cat))
}
if Env.sharedInstance.cats.filter({ $0.type == "DAILY_FEED"}).count > 0 {
self.daily_feed = Env.sharedInstance.cats.filter({ $0.type == "DAILY_FEED"})[0]
}
}
}
}
struct w_landing_Previews: PreviewProvider {
static var previews: some View {
w_landing()
}
}我已经尝试过苹果社区中的每一种解决方案，Stack溢出，但我仍然被这种崩溃所困扰：
AttributeGraph先决条件失败:属性的无效值类型: 632448 (saw PreferenceKeys，预期ViewList)。
获得完整日志的唯一方法是在TestFlight上上传一个版本，并在应用程序在Xcode上崩溃后将报告发送给我自己，崩溃日志是无用的，我无法从崩溃的来源识别出来。
回答 1
Stack Overflow用户
回答已采纳
发布于 2021-06-12 03:22:48
很难确切地说出问题是什么，但这句话是：
DispatchQueue.main.async{
self.listID = UUID().uuidString //Void apple SwiftUI big in AttributeGraph cycle ( seems it worked by Jack )
}导致我认为，您可能有潜在的不稳定造成的重叠视图层次更新。
很好地讨论了如何任意更新视图ids会导致本周的2021年WWDC (神秘SwiftUI)：https://developer.apple.com/wwdc21/10022中的问题
你也有这句话：
}//end of geo
.id( self.listID )这会迫使geo视图更新自己。再加上上面对.onAppear的重置，导致整个视图层次结构不断地更新自身(并且是不稳定的)。下面是另一个关于错误状态更改如何导致不稳定行为的指南：https://swiftui-lab.com/state-changes/
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/67905586
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