Named Colors are duplicated in Storyboard file

Originator:guillaume.algis
Number:rdar://35172913 Date Originated:25-oct.-2017 04:04 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Xcode 9.0.1 (9A1004), macOS 10.12.6 (16G29)
Classification:Other Bug Reproducible:I didn't try
 
Summary:
This happened a few time since I started using Named Colors [1] in my Storyboard in Xcode 9: I make modifications, tweak colors here and there (using named colors) and save. When opening the .storyboard file after that, Xcode prompts a warning dialog saying it found some inconsistency in the file.

Each time its "Multiple resources have the same name: <Color name here> (See attached screenshot).

And checking in a text editor, the file do have the namedColor tag for the color duplicated. Here a diff after Xcode "repaired" the storyboard file:

    --- a/EMR/Views/Patient Record/Consultation/Prescription/Prescription.storyboard
    +++ b/EMR/Views/Patient Record/Consultation/Prescription/Prescription.storyboard
    @@ -1898,9 +1898,6 @@
             <namedColor name="Lighter Grey">
                 <color red="0.94901960784313721" green="0.94901960784313721" blue="0.94901960784313721" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
             </namedColor>
    -        <namedColor name="Lighter Grey">
    -            <color red="0.94901960784313721" green="0.94901960784313721" blue="0.94901960784313721" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
    -        </namedColor>
             <namedColor name="Tonic Orange">
                 <color red="0.92941176470588238" green="0.47058823529411764" blue="0.23921568627450981" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
             </namedColor>

You can see the color "Lighter Grey" was represented twice in the same file hence the error.

[1] http://martiancraft.com/blog/2017/06/xcode9-assets/#color-assets

Steps to Reproduce:
I actually have no idea why this occurs, this seems random but happened a few times since I started using Xcode 9 / Named Colors.

Expected Results:
Xcode saves the Named Colors reference just once per color in the .storyboard file.

Actual Results:
Xcode saves the same colors multiple times in the same file, making it complain the next time it'll parse the file.

Version:
Xcode 9.0.1 (9A1004), macOS 10.12.6 (16G29)

Notes:
Attached are a screenshot of the error, and one of the storyboards affected (not the most lightweight of my app, sorry ^^).

Also, I'm sure it's not caused by a SCM operation, I'm currently working alone on this project and never had a merge on the branch I got the error on :)

Comments

I'm having the same issue with Xcode 10.2.1 (10E1001)

By squarer at May 23, 2019, 11:28 p.m. (reply...)

This happens to me too I also have no idea what is causing it other than using Named Colors.... I feels very similar to the bug in XCode where XCode will randomly dork with your storyboard files changing things like ToolsVersion and floating point coordinates.

I am using XCode Version 9.3 (9E145)

By jstofle at March 31, 2018, 3:52 a.m. (reply...)

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