The colors of the texts are in white instead of black in my application for some Iphone

[GGN2007]

Body

Hi,

I've an application developed with Xcode/swift5. When I test on several simulators the result is good. I've also test on my Iphone in Xcode, the result is good, all text are black. Now the application is in production. Unfortunately for somes users the result is'nt good, all text are white. I do'nt understand why. is there a solution to solve this problem. In attach files i put some screen and the info.plist
Thank you very much for your help
Best regards
Geo

rges

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[jfullstackdev]

I'm not sure if I'm getting it correctly but I'll still post it here,

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Likely Cause

This almost certainly has to do with iOS Dark Mode.

• Since iOS 13, apps automatically adapt colors for Light/Dark appearance unless explicitly set.
• If the app uses system colors (like UILabel default text color) without overriding, then on devices in Dark Mode, text will turn white (on a dark background).
• On developer’s device, maybe Dark Mode was off, so text stayed black.
• In production, users who have Dark Mode enabled see white text, which may clash with the app’s background.

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Possible Fixes

1. Use semantic colors (preferred):

   • Instead of hardcoding .black, use system colors like .label.

   • Example:

     myLabel.textColor = .label

   • This ensures text is automatically black in Light Mode and white in Dark Mode.

2. Force Light Mode (if you don’t support Dark Mode yet):

   • Add to your Info.plist:

     <key>UIUserInterfaceStyle</key>
     <string>Light</string>

   • This forces your app to always use Light Mode.

3. Check custom backgrounds:

   • If you hardcoded a light background (like white) but also let labels auto-adapt, you’ll end up with white-on-white text.
   • Either use semantic background colors (.systemBackground) or manually set contrasting colors.

[GGN2007]

Thank you very much for your help,
I will make these modifications and do a test with the user Thursday morning

[HPD666]

Hi Geo,

It sounds like the issue is related to Dark Mode on iOS. When testing on simulators and your own iPhone, you might have only tested in Light Mode, so all text appeared black. On production devices, if the user has Dark Mode enabled, text colors that were hardcoded or not explicitly set can appear white, especially if using system colors like labelColor or default text colors.

A few suggestions to fix this:

1. Explicitly set text colors in your app for both Light and Dark modes, or use adaptive system colors like UIColor.label which automatically adjusts for the current interface style.
2. Check your Info.plist and Storyboard/XIB settings to ensure the app supports both appearances, or disable Dark Mode if not needed:
   UIUserInterfaceStyle
   Light
3. Test your app on both Light and Dark Mode on real devices, not just simulators.

Most likely, setting adaptive colors or explicitly specifying colors for Dark Mode will solve the problem.

Reference:
https://developer.apple.com/documentation/uikit/uicolor

[aminesdev]

Hi Geo 👋

The issue you’re describing is almost certainly related to iOS Dark Mode.

Why this happens

• Since iOS 13, apps automatically adapt to Light/Dark mode unless explicitly configured.
• If you didn’t force a style or use adaptive colors, the system will invert colors:
  • In Light Mode, default text appears black.
  • In Dark Mode, default text appears white.
• On your device and simulator, you likely tested only in Light Mode. But users with Dark Mode enabled see white text, which clashes with your background if it’s also light.

Solutions

✅ Preferred: Use semantic system colors

Instead of hardcoding .black or .white, use adaptive colors like .label or .systemBackground:

myLabel.textColor = .label       // adapts automatically
myView.backgroundColor = .systemBackground

This ensures text and background always adapt correctly in both Light and Dark modes.

🚫 If you don’t support Dark Mode yet

You can force the app to always use Light Mode by adding this to your Info.plist:

<key>UIUserInterfaceStyle</key>
<string>Light</string>

🔍 Double-check custom backgrounds

If you’ve hardcoded a white background but left text as .label (which turns white in Dark Mode), you’ll end up with white text on white background.

• Fix by using .systemBackground instead of hardcoding UIColor.white.

What to do now

1. Test your app in both Light and Dark Mode on a real device (Settings → Display → Appearance).
2. Update text/background colors to semantic ones, or force Light Mode temporarily.
3. Re-release the app with the fix.

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📚 Reference: Apple docs on UIColor

This should resolve the white text issue your users are seeing. 👍

[GGN2007]

thank you very much for your explanations and your good advice!!

[GGN2007]

Hi,
thank you very much to all of you for your explanations and your good advice
I did some tests in Light and Dark mode and now everything is ok
Georges