Xcode 15 Previews Stuck on Loading Forever

Question

victormarcias OP

Created Apr ’24

Replies 3

Boosts 1

Views 1.8k

Participants 4

Hi,

I have had this issue since I started working again in iOS this year with Xcode 15. What happened to the SwiftUI Previews?

My problem is that they are stuck forever in the Loading screen "Preparing iPhone Simulator for Previews". I now test the code on the actual Simulator and waiting for Xcode 16 to fix this.

The characteristics of my project are:

Using Swift Package Manager (10+ dependencies)
Using Unit Tests and Test Plans.
Using macOS Ventura (reverted from Sonoma because it's even worse)
Macbook Air M1 - 16GB of RAM.

I have tried everything including:

Erasing derived data.
Restarting.
Reinstalling the whole computer.
Reverting Sonoma to Ventura.
Reverting Xcode 15.2 to 15.1 and 15.0.1.
Using Previews_Provider and #Previews {}
Using completely empty projects to test previews.

Please help. Thanks

Boost

Answer 1

Developer Tools Engineer OP

Apple

Apr ’24

Hi,

Sorry to hear you are having problems getting previews working. Best next step will be to file a feedback with diagnostics so we can take a look.

Steps to generate helpful diagnostics:

Download and install the logging profile on all devices involved. Instructions and profiles are available here: https://developer.apple.com/bug-reporting/profiles-and-logs/?name=swift
Reproduce the issue
Click the "Diagnostics" button in the error banner in Previews' Canvas area (or if the banner is missing you can use the menu: Editor > Canvas > Diagnostics)
In the sheet that appears, click "Generate Report" in the bottom left of the sheet
Attach (or make from the folder) the resulting zip file to the bug report (will be named something like previews-diagnostics-0123456789.zip)
Generate the sysdiagnose(s) and attach those too

0

Answer 2

Christiancar23 OP

Aug ’24

Hi, did you ever find a solution to the preview canvas not loading?

0

Answer 3

marco.bonati@fabrick.com OP

Oct ’24

I have the same problem. With new Xcode 16.0 it seems even worse. On a new project without any changes the ContentView is not viewable, the preview stays loading indefinitely. Already deleted Derived Data, restarted everything, but no luck. Xcode is getting more and more embarrassing with each passing year.

many little wow effects but on the substantive features there is absolute lack of quality.

1