Xcode 11 Beta - Storyboard ViewControllers 出现黑色

Question

I have updated by Xcode to Xcode 11 Beta and have updated the build settings from iOS 12.2 to iOS 13. Everything is working perfectly but the viewcontrollers in Storyboard appear black. The components of the viewcontrollers are present but it is difficult to preview due to the black screens

Answer 1

Had this same issue, eventually tracked it down by cut-pasting elements from the black screen to a brand new view controller and see which ones cause the new one to have the same error, or caused the old one to render.

After fixing it, the diff ended up being a background image on a specific UIButton.

I found that after updating to Xcode 11 if one element has an issue, it breaks the whole storyboard like your screenshot.

Answer 2

I had this issue last night. My UITableView was expanding too far out of the screen on the right hand side. I dragged it back into the bounds of the UIViewController parent and updated the right hand side constraint to be 0.

So check if anything goes beyond the UIViewController boundary that shouldn't.

Answer 3

In Xcode 12.4

After trying lots of thing, finally i resolved my issue

First close your project.

just goto finder -> Application -> Xcode -> get info -> uncheck open using Rosetta

Now, simply open your project.

Answer 4

只需删除该视图控制器中的任何约束，然后撤消更改。

Answer 5

I had the same issue, here are the steps I followed.

1. Clear constraints, for my case the source was from UITableView, and make sure constraints are attached to safearea not superview.

2. From the toolbar on the top, go to Editor > Canvas > Layout Rectangle. It is very important to repeat this step 3 times.

Once finished, quit XCode and reopen it again and everything should be fixed. I've noticed this happens when I'm switching views for different devices 8, 11, 4s.

Answer 6

Check the values for the cell heights. In opening an older project, the row height (in the TableView itself) was 0. Changing it to a positive value or deleting the value (so it defaults to automatic) fixed the issue for me.

Answer 7

I don't know exactly what the problem was, but I was able to solve it with the following steps.

1. Run 'pod install' to install all cocoapods dependencies
2. In Xcode: Product -> Clean Build Folder
3. Restart Xcode and run the project