Post not yet marked as solved
I have a Swift Package Manager module with some SwiftUI files that I was using Previews without issues in Xcode 15.2. When I upgraded to Xcode 15.3, it fails with “Cannot preview in this file. Unexpected error occurred”. When I click to get more info, this is the error:
== PREVIEW UPDATE ERROR:
HumanReadableSwiftError
BuildError: failedToGenerateThunkInfo(could not generate preview info: noTargetBuildGraph)
Is anyone experiencing the same problems? My preview, which lives in a SPM package, works totally fine in Xcode 15.2, but fails in Xcode 15.3. Any ideas for how to fix it? I've tried deleting DerivedData, resetting package caches, clean building.
So frustrating seeing these regression issues popping up still.
I filed FB13678356 but it was quickly marked as "Investigation Complete - Unable to diagnose with current information" but there was no request for what further information I could provide! I attached a full sysdiagnose and error log!
Would also note, that when I revert back to Xcode 15.2, the previews go back to working...
Post not yet marked as solved
I keep getting the error: "Embedded binary is not signed with the same certificate as the parent app. Verify the embedded binary target's code sign settings match the parent app's."
I don't know why. The only thing I can think of is that my iPhone is signed into a different Apple ID than the one I'm using for my Xcode signing. But I'm not sure because I can't find any info about it online.
Post not yet marked as solved
The preview or editor canvas is not working in my xcode app. I have updated my computer, updated the app, deleted and reinstalled the app, done cmd+shift+k, turned off automatically refresh canvas, tried previewing it on an older model iphone, but havent found a solution. Message me for my feedback id and disagnostic report, because it is not leeting me add it without being flagged for sensitive content
Post not yet marked as solved
I'm trying to preview a SwiftUI view that resides in a local Swift package. I have the Swift package selected as the current scheme, so all the proper dependencies are available and the build succeeds. But I see this message in the Preview window:
Cannot show preview: check whether the preview is compiled for the current scheme and OS of the device used for previewing
How do I ensure the preview is compiled for a particular scheme and device OS?
I updated MacOS to 14.3.1 and Xcode to 15.3 in the hopes that that might fix this issue, but it did not.
Building in visionOS and one of my Swift UI views keeps causing Xcode to crash. The root issue is within the preview code, stuck on updating the preview code to prevent Xcode from crashing. When I run the simulator the app works perfectly, no bugs or issues. Any advice on how to update the preview code would be very helpful :)
import RealityKit
import RealityKitContent
struct BrandImage: View {
@State private var currentIndex: Int = 0
@Environment(\.openWindow) private var openWindow
@EnvironmentObject var sharedAppState: SharedAppState
var brand: [BrandEcommData]
var initialBrand: BrandEcommData
init(brand: [BrandEcommData], initialBrand: BrandEcommData) {
self.brand = brand
self.initialBrand = initialBrand
if let initialIndex = brand.firstIndex(where: { $0.id == initialBrand.id}) {
_currentIndex = State(initialValue: initialIndex)
}
}
var body: some View {
HStack(spacing: 0) {
ZStack {
ForEach(0..<brand.count, id: \.self) { index in
if index == currentIndex {
VStack {
Text(brand[index].brand)
.padding(.top, 5)
brand[index].image
.resizable()
.scaledToFit()
}
.transition(.scale)
}
}
HStack {
Button(action: {
withAnimation {
self.currentIndex = (self.currentIndex - 1 + brand.count) % brand.count
sharedAppState.currentModelId = brand[currentIndex].id
}
}) {
Image(systemName: "arrow.left.circle.fill")
.font(.largeTitle)
.foregroundStyle(.linearGradient(
colors: [.black, .gray],
startPoint: .top,
endPoint: .bottom))
}
.padding(.leading, 20)
Spacer()
Button(action: {
withAnimation {
self.currentIndex = (self.currentIndex + 1) % brand.count
sharedAppState.currentModelId = brand[currentIndex].id
}
}) {
Image(systemName: "arrow.right.circle.fill")
.font(.largeTitle)
.foregroundStyle(.linearGradient(
colors: [.black, .gray],
startPoint: .top,
endPoint: .bottom))
}
.padding(.trailing, 20)
}
VStack {
HStack {
Spacer()
Button(action: {
openWindow(id: "volumetric")
})
{
Image(systemName: "cube.transparent")
.font(.title)
.padding()
.foregroundStyle(.linearGradient(
colors: [.black, .gray],
startPoint: .top,
endPoint: .bottom))
}
}
Spacer()
}
}
.frame(maxWidth: .infinity)
Rectangle()
.frame(width: 2)
.foregroundStyle(.linearGradient(
colors: [.black, .gray],
startPoint: .top,
endPoint: .bottom))
VStack {
Text(brand[currentIndex].name)
.font(.title2)
Text(brand[currentIndex].itemDetail)
.font(.subheadline)
Text(brand[currentIndex].itemDescription)
.padding()
Text(brand[currentIndex].price)
}
}
.onAppear {
sharedAppState.currentModelId = initialBrand.id
}
}
}
#Preview {
if let initialBrand = ecommdata?.first {
BrandImage(brand: ecommdata!, initialBrand: initialBrand)
} else {
Text("Unable to load 3D Asset")
}
}
Post not yet marked as solved
I am working on a 2018 Macbook Air. Here is the diagnostic that is generated.
previews_diagnostics_summary.txt
Post not yet marked as solved
I'm new to Xcode, and I'm learning using the apple swiftUI tutorial: https://developer.apple.com/tutorials/swiftui/creating-and-combining-views
I did the first few steps, but I can't get the simulator preview to work.
My mac and Xcode are updated, but I can't it to load.
Everything works fine when I do a mac project.
Thanks in advance.
Post not yet marked as solved
Anyone else having issues in Xcode preview where when you tap on a button to open a volume window nothing appears in the Xcode preview window?
For example, if you download the Hello World Xcode project and try to open the globe volume after tapping the toggle button, the globe volume window never opens.
Running the latest version of Xcode 15.3 beta.
Does an 'archive build' require 'preview content'?
I've put swift source files into 'Preview Content' directories - one directory for the top-level App and one for an embedded framework. An 'archive build' fails, complaining about the code in a #Preview block.
#Preview {
// the archive build fails to find this `default` ??
let controller = PersistenceControllerTopLevelPreview.default
let user = controller.user
...
The framework has its 'Preview Context' specified in the Development Assets; same with the top-level App.
I can select Orientation Variants to show in the preview by selecting that option in the bottom left corner of the canvas. How do I unselect it?
Post not yet marked as solved
Is the preview set to read-only mode in Xcode 15? Drag and drop of any library items to preview canvas doesn't work.
Is this feature removed in Xcode 15? (I don't want to believe that it was so helpful)
Post not yet marked as solved
Hello,
I am a UIKit developer and I would like to try out SwiftUI.
Unfortunately, my previews don't load.
My situation is like the one described in this blog post: https://forums.developer.apple.com/forums/thread/704036.
Unfortunately I can't update Xcode like that developer did.
What I've tried: quitting and restarting Xcode, restarting my computer, resetting the simulator, deleting the derived data folder, creating new projects without storage options, test bundles or source control, editing the content view of the initial Hello World file.
To be clear, I've just started learning about SwiftUI, just yesterday evening, and the previews have never loaded.
Is the problem solvable?
If so, how?
Post not yet marked as solved
Whenever we include the mergeable configuration on an xcframework which contains a SwiftUI preview, the preview can't compile. That's because it is trying to keep the dynamic configuration but on a binary type that is not a dynamic library.
It fails with the error:
Linking failed: linker command failed with exit code 1 (use -v to see invocation)
1d: -make_mergeable can only be used when creating a dynamic library clang: error: linker command failed with exit code 1 (use -v to see invocation)
That's only happening when we add the preview.
Post not yet marked as solved
Hello,
Very recently, the following code has automatically appeared at the bottom of three of my SwiftUI View files:
@available(iOS 17.0, macOS 14.0, tvOS 17.0, visionOS 1.0, watchOS 10.0, *)
struct $s10Accent_Ace33_0BADA584A03144EFDAB57154E6FD3FBALl7PreviewfMf_15PreviewRegistryfMu_: DeveloperToolsSupport.PreviewRegistry {
static let fileID: String = "Accent_Ace/HistoryView.swift"
static let line: Int = 47
static let column: Int = 1
static func makePreview() throws -> DeveloperToolsSupport.Preview {
DeveloperToolsSupport.Preview {
let randomWord1 = FetchWord.getRandomWord()
let randomWord2 = FetchWord.getRandomWord()
@State var randomWords = [Word(word: randomWord1.0, IPA: randomWord1.1, lineNumber: randomWord1.2), Word(word: randomWord2.0, IPA: randomWord2.1, lineNumber: randomWord2.2)]
HistoryView(words: $randomWords)
}
}
}
This is from one of my files but it's very similar in the other two. It seems to have something to do with my previews.
The problem is that this code generates an error: Ambiguous use of 'init(_:traits:body:)'. My previews worked just fine before the auto-generated code appeared, so I tried deleting it. However, it automatically comes back no matter how many times I get rid of it. It's preventing me from building my App Playground, so I can't run the app or even see the previews. Does anyone know how to get rid of it or fix the error?
Thanks for the help!
Post not yet marked as solved
I've setup a NavigationLink so users can tap on the image and they're taken to another view, in this case "FenderExperience". I can't for the life of me figure out how to make this oval bar behind the image disappear. Is this an Xcode preview issue? I'm running Xcode 15.2
struct BrandImage: View {
var body: some View {
VStack(alignment: .leading) {
NavigationStack {
Text("Ralph Lauren")
.font(.title)
.padding(.bottom, -5)
Image("RL")
.resizable()
.scaledToFit()
.frame(width: 300, height: 200)
.overlay(
RoundedRectangle(cornerRadius: 0)
.stroke(Color.white, lineWidth: 2))
Text("Fender")
.font(.title)
.padding(.bottom, -5)
NavigationLink(destination: FenderXperience()) {
Image("Fender II")
.resizable()
.scaledToFit()
.frame(width: 300, height: 95)
.overlay(
RoundedRectangle(cornerRadius: 0)
.stroke(Color.white, lineWidth: 2))
}
Text("Burton")
.font(.title)
.padding(.bottom, -5)
Image("Burton")
.resizable()
.scaledToFit()
.frame(width: 300, height: 200)
.overlay(
RoundedRectangle(cornerRadius: 0)
.stroke(Color.white, lineWidth: 2))
Text("Ray Ban")
.font(.title)
.padding(.bottom, -5)
Image("Ray Ban")
.resizable()
.scaledToFit()
.frame(width: 300, height: 200)
.overlay(
RoundedRectangle(cornerRadius: 0)
.stroke(Color.white, lineWidth: 2))
Text("Levi's")
.font(.title)
.padding(.bottom, -5)
Image("Levis II")
.resizable()
.scaledToFit()
.frame(width: 300, height: 200)
.overlay(
RoundedRectangle(cornerRadius: 0)
.stroke(Color.white, lineWidth: 2))
}
}
.padding(.leading, 50)
}
}
#Preview {
BrandImage()
}
Post not yet marked as solved
Hello! I have been experiencing an issue where if I make a change to a file then preview breaks and I must rebuild the project to fix preview. I cant attach the diagnostic report unfortunately as its too big even after i compressed it. How should I proceed?
I have a CoreData model with two entities, 'User' and 'Player', that both use 'Person' as their 'Parent Entity'. While the App appears to work correctly in the simulator, including with CloudKit via NSPersistentCloudKitContainer, I get a crash in Xcode Previews:
libswiftCore.dylib [
AGScoringModel/Persistence.swift:183: Fatal error: #init(inMemory:): Failed to load persistent stores:Error Domain=NSCocoaErrorDomain Code=134110 "An error occurred during persistent store migration." UserInfo={sourceURL=file:///Users/ebg/Library/Developer/.../CoreDataStores/private/database.sqlite, reason=Cannot migrate store in-place: Cannot merge multiple root entity source tables into one destination entity root table, destinationURL=file:///Users/ebg/Library/Developer/.../CoreDataStores/private/database.sqlite, NSUnderlyingError=0x600000ce02a0 {Error Domain=NSCocoaErrorDomain Code=134110 "An error occurred during persistent store migration." UserInfo={message=Cannot merge multiple root entity source tables into one destination entity root table, destinationRootEntity=Person, NSUnderlyingException=Cannot merge multiple root entity source tables into one destination entity root table, sourceRootEntities=(
User,
Player
), reason=Cannot merge multiple root entity source tables into one destination entity root table}}}
]
Why is this? Something in my configuration for persistent container?
Post not yet marked as solved
Hey, is there any reason why code coverage is not excluded from the preview in SwiftUI?
Post not yet marked as solved
Having MacBook Pro with macOS Monterey v 12.7.2 and Xcode 13.3 (13B113) I cannot find a Xcode simulator, which could provide iPhone 6.7" display for my first app's product page'
Any advice?
Thanks!
Post not yet marked as solved
I am using the Observable macro and when I use @Environment property wrapper to instance my model the preview stop working. Sample code below
my model Library
import SwiftUI
import Observation
@Observable class Library {
// ...
}
Now in my main app I created an instance of Library and add that instance to the environment
@main
struct BookReaderApp: App {
@State private var library = Library()
var body: some Scene {
WindowGroup {
LibraryView()
.environment(library)
}
}
}
Now if I want to retrieve the Library instance from any view using the @Environment property wrapper the preview stop working completely
struct LibraryView: View {
@Environment(Library.self) private var library
var body: some View {
List(library.books) { book in
BookView(book: book)
}
}
}
#Preview {
LibraryView()
}
Check the 2 screenshots below
Any idea why this is happening? Is there any workaround? I am working with Xcode Version 15.2. Thanks in advance for any kind of help!
