Xcode 8 syntax highlighting doesn't work

Question

The code above has correct syntax highlighting in Xcode 7. It is mix of Obj-C + Swift:

I've updated project to support Xcode 8 and only few things was changed:

• In Build Settings Swift 2.3 support

• And have fixed few errors related to implicitly unwrapped properties in UIKit

After all the project is compiled fine for Xcode 8.

But Obj-C code integrated in Swift doesn't have any syntax highlighting and vice versa:

And there is << error type >> problem with autocomplete:

Derived data deleting doesn't help, Xcode restart either :) CocoaPods version 0.38.2, iOS 7

Solution 1

Fixed. Problem was related to the presence of target in project which is not compiled. So if you have targets e.g. A, B, C and C is not compiled this cause problems with syntax highlighting.

Solution 2

This answer helped me https://forums.developer.apple.com/thread/46223 with one of my projects:

I got help from an apple engineer at WWDC on this issue and resolved it. The problem stemmed from cocoapods... Apparently cocoapods was copying .h files into the build directory and SourceKit was getting confused. I'm not entirely sure why the .h files were being copied - they aren't needed there. So the fix was to add a post-build script in your build phases section that removes the headers after a build.
It would look something like this:

function removeHeaders() {  
    find $BUILD_ROOT/Debug-iphonesimulator/  -name '*.h' -exec rm -f {} \;  
}  
removeHeaders  

Solution 3

I have found that when syntax highlighting falls over, switching tabs in Xcode fixes the issue ¯_(ツ)_/¯ sometimes I find I need to switch to at least 4 different tabs before it comes on again.

Otherwise a quit and reopen

Solution 4

It happened also to me with Xcode 8 GM but also lots of time when I used Xcode 7: sometimes the auto-complete feature and the syntax highlighting die without notice.

The only solution that it works for me is restart Xcode but a few times I needed to complete reboot my Mac; I still don't know exactly what causes this annoying problem.

Solution 5

Commenting and then uncommenting the affected lines worked for me.

View more solutions

Comments

[Andrey Banshchikov]

Related to stackoverflow.com/questions/36165865/…

[ymutlu]

Thanks for the post helped me alot.

[Endama]

There is now a Cocoapods issue on Github

[Adrian]

Flipping that to YES generated a bunch of compiler errors, but flipping it back to NO, cleaning caches, and rebuilding fixed the autocompletion issue for me.

[Adrian]

I encountered this issue when converting a Swift 2.3 syntax project to Swift 3.0. Adding that script resolved the issue for me. My project did not have any CocoaPods in it.

[Shamsiddin Saidov]

How to add post-build script? Is that target -> Build Phases tab -> Plus button click -> New Run Script Phase option click ?

[Adrian]

@Shamsiddin Yes, that's the spot you'll want to put the script. Cut and paste it in there, then press shift+option+command+K to clean caches, then click ctrl+B t rebuild and it should work properly for you after that. If that doesn't do it, try restarting Xcode and re-open your project.

[TheCodingArt]

AKA, another reason not to use Cocopods

[Desh__]

This is viable option that certainly works. I've yet to find a solution that solves this problem 'correctly' so as a temporary fix, whats the problem? 2 birds with 1 stone.