Preview Canvas does not work

UI Frameworks SwiftUI
bergersilvio OP
Created Dec ’21
Replies 7
Boosts 0
Views 7.1k
Participants 14

My Preview Canvas does not work anymore.

I already uninstalled and freshly reinstalled Xcode (App Store Version and direct download from developer.apple.com, version 13.2 with Big Sur and now updated to Monterey 12.1). I uninstalled Xcode using AppCleaner and also by clearing the clang/cache folders, as well as Lib/Dev... etc. manually, but the same error comes up over and over again.

When I run the code directly (via Run/Simulator instead of Preview/Canvas) the app shows up and works just fine.

I open Xcode, I create a new project for iOS, I resume the preview and it fails with the attached error...

Preview Canvas Diagnostics

Any help would be greatly appreciated as at the moment, I don't have a running development environment unfortunately...

Thanks in advance.

Best regards Silvio

Answered by seamount in 698492022

This fixed it for me:

  1. Finder > Go to folder "/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/"
  2. Remove "SwiftShims-2TTN5UXQBRCCQ.pcm" (I kept a copy on my desktop just in case)
  3. Run a build in the simulator
  4. Preview now works (for me at least)

Hope this works for you.

Replies  7
Boosts  0
Views  7.1k
Participants  14
seamount OP
Dec ’21

Same problem here.

0
seamount OP
Dec ’21
Accepted Answer

This fixed it for me:

  1. Finder > Go to folder "/var/folders/kv/t_w2wdds3m1_0lr02hcp3dgw0000gn/C/clang/ModuleCache/12TRQXIDQ8QQD/"
  2. Remove "SwiftShims-2TTN5UXQBRCCQ.pcm" (I kept a copy on my desktop just in case)
  3. Run a build in the simulator
  4. Preview now works (for me at least)

Hope this works for you.

17
holgerflick OP
Dec ’21

Also using 13.2.1 helps ... but that version then has other issues.

0
snackdog OP
Dec ’21

I had that error for a while and removing the cache helped but then I got a new error:

MessageSendFailure: Message send failure for update

==================================

|  RemoteHumanReadableError: The operation couldn’t be completed. XPC error received on message reply handler

|  

|  BSServiceConnectionErrorDomain (3):

|  ==NSLocalizedFailureReason: XPC error received on message reply handler

|  ==BSErrorCodeDescription: OperationFailed

0
snackdog OP
Dec ’21

It seems my error is only occurring with the SwiftUI view has an @FocusState variable.

0
AdvaitaSinha OP
Dec ’21

Sometimes Commmand + Shift + K, which is clean also works. It solved it for me. Worth mentioning

0
Wovoka OP
Jun ’22

Thanks, I was encountering the same error from the recent upgrade, and COMMAND + SHIFT + K restored my preview.

0
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