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Xcode 12.5 seemed to have removed the "View As" option for iPhones X, XS, 11. I have an iPhone X that I use as a test device for my apps and there is no equivalent preview size in Storyboards. This is so annoying! Anyone know a way to add an additional View size?
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My Xcode preview keeps crashing and doesn't preview my project. But I have another project that previews perfectly fine. So if anybody knows how to fix this I would gladly appreciate it
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While selecting a framework rather than the executable as the active scheme,
SwiftUI preview cannot use: Updating took more than 5 seconds.
However, while selecting the main app target, it can work perfectly.
Repro steps:
git clone https://github.com/imWildCat/NonExecutableTargetCannotUseSwiftUIPreviewDemo
cd NonExecutableTargetCannotUseSwiftUIPreviewDemo
xed NonExecutableTargetCannotUseSwiftUIPreviewDemo.xcworkspace
Select the “SharedUI” target as the active scheme
Open the WebImage.swift source file
Run the SwiftUI preview
Please note that, if you use the main app target (executable rather than the frame), it can be previewed.
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When I preview my app in Xcode, it shows up on two different preview simulators/devices. Then, when I actually run it it appears glitched out.
Here is my code:
import SwiftUI
struct ContentView: View {
@State var showDetailsScience = false
@State var showDetailsMath = false
@State var showDetailsELA = false
@State var showDeatailsSocial = false
var body: some View {
VStack {
Text("Core Subjects")
.font(.largeTitle)
.fontWeight(.bold)
.position(x: 120 , y: 30)
.padding(0)
}
NavigationView {
VStack {
Spacer ()
NavigationLink(
destination: ScienceView(),
label: { Image ("Science")
.cornerRadius(25)
.position(x: 290, y: 18)
}
)
NavigationLink(
destination: MathView(),
label: {
Image ("Math")
.cornerRadius(25)
.position(x: 100, y: -145)
}
)
NavigationLink(
destination: ELAView(),
label: {
Image ("ELA")
.cornerRadius(25)
.position(x: 100, y: -100)
}
)
NavigationLink(
destination: SocialStudiesView(),
label: {
Image ("SocialStudies")
.cornerRadius(25)
.position(x: 290, y: -265)
}
)
}
}
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
Here are some images:
If anyone knows how to fix this please let me know, as I am very desperate
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I may or may not know how to get the live preview window back up. Please help!
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I see a problem with designing using dark mode displays. Why is no background In HStack and VStack areas around the text fields invisible in the HStack. This seams to be a bug in the design of the SwiftUI Preview?
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I used to be able to "right click" on the play button for a preview, but in Beta 1 and 2 of Xcode 13 that isn't working (neither is control clicking). Any ideas how to debug a preview short of running app in the simulator?
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Hi All,
I am facing the issue "No Such Module *******"
This issue comes in every 3 to 4 weeks.
It's always fixed after a 3 to 4-day long struggle but the same solution does not work for next time, which worked earlier, so there is no proper way to resolve this issue.
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Hello colleagues.
My question is whether or not Xcode Previews source code included (or removed) starting Xcode 12.5 in:
final binary of the application?
SwiftPM package library artifact?
I know there's "Development Assets" folder that's included for previews only. But I didn't really find information about preview source code.
Thanks,
Dzmitry.
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Hi Everyone I am having problems with running my preview as it returns the error, 'Failed to launch app “…” in reasonable time.'
This is with version 12.5.1.
Please can you help me find a way to fix this problem, Thanks
Hello,
I am new to XCode and I have started using the tutorials. I am unable to see the Live Preview when I load the StartingPoint file for the HandlingUserInput Tutorial:
https://developer.apple.com/tutorials/swiftui/handling-user-input
I know about Opt+Cmd+Return and the menu option, and when I try that in different projects (such as new ones I created myself or previous starting points from the tutorial), it works and pressing those keys or that menu button toggles the visibility of the live preview as expected. For this particular startingpoint, I am unable to load the live preview at all. I couldn't fix some errors in the last lesson and so I want to use this provided startingPoint for this next lesson. Does anybody have any ideas?
Thank you very much!
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Hi there, for some time now I'm having trouble debugging SwiftUI previews in Xcode. Whenever I select "Debug Preview" it fails with this error message:
error: attach by pid '12009' failed -- attach failed (Not allowed to attach to process. Look in the console messages (Console.app), near the debugserver entries when the attached failed. The subsystem that denied the attach permission will likely have logged an informative message about why it was denied.)
When I look into the console messages, it says:
macOSTaskPolicy: (com.apple.debugserver) may not get the task control port of (XCPreviewAgent) (pid: 12009): (XCPreviewAgent) is hardened, (XCPreviewAgent) doesn't have get-task-allow, (com.apple.debugserver) is a declared debugger(com.apple.debugserver) is not a declared read-only debugger
Running the preview in non-debug mode ("Live Preview") works absolutely fine. It happens always and with an absolute minimal SwiftUI example:
Package.swift:
// swift-tools-version:5.3
// The swift-tools-version declares the minimum version of Swift required to build this package.
import PackageDescription
let package = Package(
name: "SwiftuiDebugIssue",
platforms: [.iOS(.v14)],
products: [
.library(
name: "SwiftuiDebugIssue",
targets: ["SwiftuiDebugIssue"]),
],
dependencies: [],
targets: [
.target(
name: "SwiftuiDebugIssue",
dependencies: []),
]
)
Sources/SwiftuiDebugIssue/MyView.swift:
import SwiftUI
struct MyView: View {
var body: some View {
Text("Hello, world!")
}
}
struct MyView_Previews: PreviewProvider {
static var previews: some View {
MyView()
}
}
Relevant versions:
macOS 11.5.2 (20G95)
Xcode 12.5.1 (12E507)
Thanks for any hints/help
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Hello, I’m not a developer but a regular user and while I was checking out iOS 15’s features I came across XCode Previews within the Accessibility > Per App Settings menu. I never downloaded this app and it did not appear in the Home Screen or App Library until I opened it with a Shortcuts > Scripting > Open App command. Now it appears in the App Library but I am unable to remove it. Why is it in my phone? How can I remove it? Can it be maliciously accessed? Please help removing it.
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SwiftUI Preview Don't work.
Progress Preparing iPhone Simulator for Previews.
SwiftUI
Xcode version 13.0
macOS Big Sur version 11.6
After I upgrade to Xcode - 13 I have this problem, every time I try to generate preview in any file, Xcode take more than a minute and the system runs out off application memory:
then system become unstable and never recover even closing Xcode, I try restarting but the system hangs and need to make a force shutdown.
I reinstalled Xcode more than once and still have the issue. Im running on intel MacBook Pro 2020 BigSur 11.6
Up until yesterday I was able to use preview in Xcode. I don't know if it is since my system updated to 13 (I never used the beta) but suddenly I can't use preview with SwiftUI. This is in the same project that was previewing with no issues. In response I have went to preferences-> components and downloaded the simulator for the version I'm trying to simulate, ie. IOS 14.5. This did not help.
Error says
"Xcode is missing components needed to preview on IOS"
Diagnostics says
"PlatformDoesNotHaveAgentsError: Missing required components for iOS
Xcode is missing components needed to preview on iOS
==================================
| HumanReadableSwiftError
|
| LocationError: noBundle
I'm trying to preview the SwiftUI screens from my Mac app on the canvas in XCODE 13. In live operation, the model on my app connects to an external device via TCP over the network. I have a an initializer (init()) for my model that initializes the model without network access and I use this in the PreviewProvider in my view file. However, the preview fails to load unless the external device is available on the network. The preview says it is unable to connect to the main application, which makes sense as the main app won't run without the device present.
Why does XCODE have to run the app? and if so, what is the purpose of the PreviewProvider in the view file?
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I am developing a Mac app using SwiftUI and XCODE 13. I have the preview displaying, and while the SwiftUI Inspector is available when I command click in the source code, it is not available in the preview pane. The icon for the inspector in the menu above the preview is grayed out as is the icon to duplicate and the inspector icon at the bottom of the window.
These icons are present in a similar app from which I adapted the views.
Mark
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Hi folks,
I downloaded the Xcode 13 and created a new project, named 2021107. After launching the program and without writing any code, the preview failed in the very beginning as shown in fig1.png. The error message shows the project '20211007' does not contain a preview provider named "ContentView_Previews_". It asks me to check the build settings to ensure the preview provider is compiled to the product. Since I'm a beginner in the Xcode, I'm sorry I'm not sure where the settings are and what to do to fix it. I click on the 'Try Again' to rebuild the preview and it failed again. I used to use the Xcode 12 to study the Swift language and I remember the Preview showed the 'Hello world' after launching the program. It seems the Xcode 13 is different. I'd be much obliged if anyone would help me with the problem. Thanks in advance!
Additional information:
[1] When I clicked on 'build', it succeeded. The simulator was launched without any error.
[2] Fig2 shows the message when I clicked on 'Diagnostics' next to the 'Try Again' on the preview panel.
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The Build for Previews builds all my targets including the test targets. Is there a way to configure the relevant targets? I do not see an option in the schema editor, and disabling Find Implicit Dependencies has no effect either.
