I was trying to update my project from Xcode 13 to Xcode 14.
But I got a lot of errors. They are similar but I don't know how to fix them. Take a look in the image below:
It's the same error that appears in a lot of files.
I try to click on "Type declared here".
But it didn't appear the error inside the Swift file.
When I click on "self declared here", I see this
It shows no error on the file.
When I was clicking on the errors, they vanish sometimes, but for some unknown reason, they reappear after some time.
Anyone got any idea of how to fix this?
EDIT 1:
The problem is related to the "OcrProcessingViewController" class.
I comment this class and the code starts to work again. But I still din't find what was causing the problem.
If I restore the code, I can see only one error now.
This is the full code on my "OcrProcessingViewController" class file
https://swiftfiddle.com/kfmxwr6snrbknne3msmapvkx5m
I suspect it is related to the "protocol CodigoOcrDataDelegate: AnyObject", but I don't know how yet how this happens.
I find out what was causing the problem.
It was the property
lazy var textDetectionRequest: VNRecognizeTextRequest = {
let request = VNRecognizeTextRequest(completionHandler: handleDetectedText)
request.recognitionLevel = .accurate
request.recognitionLanguages = ["en_GB"]
return request
}()
I just need to move it to start of the class(removing it from inside the function) and everything works perfectly now on Xcode 14
I am new to macOS development.
I am trying to develop macOS FileProvider extension, and everything was fine until I updated my macOS from 11 to 12.2.
After updating OS, FileProvider extension won't being loaded by NSFileProviderManager.add(domain) and its completion handler returns error - NSFileProviderDomain.Error.providerNotFound
#IBAction func tapAddDomainButton(_ sender: Any) {
NSFileProviderManager.add(domain) { error in
print("Error: \(error)") // <- Error: Optional(Error Domain=NSFileProviderErrorDomain Code=-2001 "The application cannot be used right now." UserInfo={NSLocalizedDescription=The application cannot be used right now.})
}
}
I've made a new boilerplate project with default macOS > App + 'File Provider Extension' in Xcode, and still got same error.
Same code works on macOS 11.6.1.
Weird thing is that apple sample code won't return error and still works in macOS 12.2.
I can't find any difference between my code and Apple Sample Code.
I uploaded my test project here.
Please help
Thanks in advance.
Additional info: My colleague tested in macOS 12.0.1/12.1 and my test project works fine.
I encountered the same problem and even opened feedback with apple.
What I figured out (after way too long pulling my hair out) is, as you write, the app group is essential.
But not only that, the Extension Info.plist key "NSExtensionFileProviderDocumentGroup" must correspond to your app group.
I think I managed to this problem.
The key point is AppGroup. FileProvider requires AppGroup capabilities.
I think that a step to reproduce the issue likes below.
Launch provider without AppGroup at first time, and face the FileProvider error.
Add AppGroup capabilities and relaunch.
Still got the error.
New project with adding AppGroup capabilities at first launch won't fail.
I managed to fix it by changing the app and extension group (com.apple.security.application-groups):
From $(APP_TEAM_ID).MyGroup
To group.MyGroup
When I try to preview one of my views in the canvas I keep getting the following error:
PreviewUpdateTimedOutError: Updating took more than 5 seconds
All my other views load perfectly fine.
Why is this happening and how do I resolve?
I am using SwiftUI in Xcode 11.4 (public release)
I stopped using the simulator and chose "Any iOS Device" and that solved the problem.
In my case the issue was this line in Build settings:
Something I did accidentally changed signing settings in my project. Specifically, "signing identity" was set to "Sign to Run Locally.".
For some reasons, SwiftUI Previews don't work then.
Simply deleting this line from build settings (aka setting default value) solved the problem.
Some time, the error displaying is not the real error.
For me it was because i missing : .environmentObject(...)
As of Xcode 12.5.1, the message PreviewUpdateTimedOutError: Updating took more than 5 seconds most likely means that your app crashed and thus updating the preview failed. The real reason for the crash is unfortunately obscured by this useless message (why Apple would do that is beyond me). To get at the real reason, you'll need to:
click Diagnostics at the top of the preview next to the useless error message
in the next dialog, click Generate Report > Reveal in Finder
This will take a bit. Then Finder will open with a folder highlighted. Open that folder. Inside you'll see a lot of log files and folders.
If your app indeed crashed, you'll see a folder called CrashLogs which contains crash logs for your app, including the error message and stack trace. This should help you resolve the actual error causing the preview to break.
Note that for me, sometimes the CrashLogs were not included in the report even though my app really did crash. Retrying the preview and generating another report fixed this for me. The whole error reporting process seems to be rather unstable for the previews, unfortunately.
Try Clean (Shift + ⌘ + K) and Build (⌘ + B) to build again the SwiftUI project, it works in Xcode 11.6. Try building a basic hello world app.
In my case the issue was that the PreviewProvider was marked private. Simply make it internal or remove the private access modifier.
private /* <- remove */ struct YourView_Previews: PreviewProvider {
static var previews: some View {
// Your previews
}
}
I am using Version 13.2.1 (13C100). I have Clean (Shift + ⌘ + K) and Build (⌘ + B) the project. But, the problem remains.
Then, just restarted Xcode. And the problem gone.
In my case viewModel required to display SwiftUI_preview was doing a call to a CoreData (fast call) in the init of the viewModel.
Moved actual call of that "reload() method" so it's not called on preview, fixed.
(I believe the correct way is to use mocked protocol instead of instance of the viewModel)
If you have an .onAppear clause, try commenting that out for preview.
None of these suggestions helped me but I did discover that you can't rely entirely on a successful build to pick up all issues. In my case I had '.modifier(modifier:)' entered incorrectly as 'modifier(modifier:)'. My code built successfully but my preview did not work until I added the period before modifier.
For me the issue was related to a force unwrapping of an element not being found at preview time.
Note: Always check the diagnostics report. The issue will be at the top section after termination reason.
In my case the canvas/screen size was smaller than the content, so simply wrapping my content in the scrollView do remove the error and displaying the content in the canvas.
I had a fatalError("...") in my code, which I only figured out after reading the diagnostic logs. Would be nice if SwiftUI actually hinted this!
You can get the diagnostics by clicking "Diagnostics" next to "Try Again" at the top of the preview window.
To summarise lots of answers here, it seems that the preview taking a while to update is the equivalent of a crash, when running on a real device or on the simulator.
First comment out all the environment Objects are used for the particular View. Once you get preview then uncomment it to run the build. This trick works for me
//#EnvironmentObject var observerObj:PropertyObserver
I had this issue as well, and nothing fixed the problem. I am now on 11.6 and after updating the issue went away. I think it might be a problem with Xcode 11.4.
I'd suggest updating Xcode if possible.
In SwiftUI, you couldn't add more than 10 subviews into your contentview, otherwise it couldn't compile.
I had the same problem, then I started to comment out the subViews inside my main view, one by one & try to preview again then I found out the problem was caused because I forgot to put a dot before one of the subViews attributes.
So that's how I fixed it.
The reason is because its unable to find the landmarkData.json file. To resolve this,
select landmark.json file in Resources.
Show Inspectors ( top right icon )
Select show file inspector
Under Target membership, select / check Landmarks
This should resolve the preview issue.
For some reason, in SwiftUI, when I embeded Text in Scroll View and VStack, this error occurred. After few unsuccessful attempts to fix this by clearing and building project, I deleted code and wrote it down again, same as it was. Now it is working.
I had my run device set to a real device I use for testing. When I changed that to one in the simulator it started working again.
Similar to #YannSteph, this happened to me because I put the .environmentObject() at the app entry point where it creates the first view:
#main
struct RecipeApp: App {
var body: some Scene {
WindowGroup {
RecipeTabView()
.environmentObject(RecipeModel())
}
}
}
But this prevented the preview from working. I thought I was being smart putting it there, so all the views could have access to it, but it just crashed the preview.
Moving it back into the main View.Swift file that is my app's starting view fixed the preview issue.
^^^
EDIT: Ran into this again when I didn't put the .environmentObject() in the struct for the preview. Probably a rookie mistake but there appears to be many ways to trigger this error.
I had the same issue after creating a brand new Multiplatform App project using Xcode 12.5. Based on the solutions above I followed a hunch and now believe that the issue is due to invalid path parameters.
After renaming the Schemes and Targets from (iOS) to .iOS (and the same for macOS), to remove spaces and brackets, it is now working.
I had this issue after changing bundle id and signing from personal to team.
After changing device to Any device as advised here, I received another error description, saying
Could not install the preview host "AppName.app" on iPhone 12 Pro Max
agentBundle = com.bundle.Its.AppName {
url: file:///Users/macbookair/Library/Developer/Xcode/DerivedData/AppName-> desupjbpqvjlegfbskxydixpouvc/Build/Intermediates.noindex/Previews/AppName/Prod> ucts/Debug-iphonesimulator/AppName.app
> version: 49557
signingInformation: Code Signing {
identifier: com.bundle.AppName
hasGetTaskAllow: false
isSandboxed: false
}
}
Clean build, deleting Derived, Deleting all apps installed on simulators, cleaning Xcode Cache, restarting Xcode and Mac didn't help.
What had helped was creating new project with initially correct bundle id and copying all my files there.
I have got into the same issue on Xcode 12.4, but the code works fine on Xcode 13.0.
I was following the IOS App Dev Tutorial, where one creates an app named ScrumDinger. I ran into this issue at Displaying Data in List
In my case the problem was that I wrote in CardView.swift
HStack {
Label("\(scrum.attendees.count)", systemImage: "person.3")
accessibilityLabel("\(scrum.attendees.count) attendees")
instead of
HStack {
Label("\(scrum.attendees.count)", systemImage: "person.3")
.accessibilityLabel("\(scrum.attendees.count) attendees")
The missing dot before accessibilityLabel was the problem.
Tutorial:
https://developer.apple.com/tutorials/app-dev-training/displaying-data-in-a-list
In my case the issue was that I was trying to preview a view with a fixed width (.previewLayout(.fixed(width: 344, height: 220))) wider than the selected simulator (iPhone SE 1st generation) 😬
I get this error often. My last time of occurrence, I had "gesture" instead of ".gesture". Usually its best to just need to find the error in your code yourself because Xcode does not point out the issue directly.
I only had Xcode 14 Beta installed on my machine and the previews did not work. All of the other answers did not work for me.
Installing Xcode 13.4.1 and running the preview with it did solve my problems and now I can also see the preview in Xcode 14 Beta as well.
In my case, I disabled automatic canvas refresh by going to Editor -> Canvas -> Automatically Refresh Canvas and making sure it.
Then I use ⌥⌘P (Command-Option-P) to refresh the canvas preview.
The following swift code snippet compiles properly when built for the simulator, but if I select my iPhone 4 device (iOS 9.3.1) XCode complains:
if let result = (jsonobj["user"] ?? jsonobj["users"]!) {
if let item = result["userID"] as Int {
self.userID = item
}
}
The error points to the 'result' variable on the second line and says "Value of optional type 'AnyObject?' not unwrapped; did you mean to use '!' or '?'?"
The error makes no sense, as 'result' is unwrapped in the first line. Also, there was no problem before upgrading to XCode 7.3. As noted, if I switch to building for the simulator, the error goes away.
Should I post this as a bug? Does anyone have any insight?
UPDATE
When I first encountered this problem the device was not updated to the latest iOS build (9.3.1). I tried to make the compiler-suggested changes; this allowed the code to build but introduced errors when the simulator was chosen for a build. Also, the code crashed inexplicably when I ran it on the device.
I've subsequently updated the device to 9.3.1 and now the edited code runs without crashing, which enables me to continue development, but doesn't explain the difference with the simulator.
Next I created a new project and copied the erroneous code into the AppDelegate.swift file; the error appears again, however, it also appears for a simulator build. Making the recommended changes fixes the problem in both cases.
I will proceed by examining the build settings for both projects and see if there is a more specific cause for the difference in behavior between the device and the simulator.
Rewrite like this:
if let result = jsonobj["user"] as? NSDictionary {
if let item = result["userID"] as? Int {
self.userID = item
}
}
I had to provide an explicit type for 'result' in the first line:
if let result:AnyObject = jsonobj["user"] as? Int {