How can I specify text in iOS to be white if the device is in dark mode and black if in light mode?

Question

I am working on a launchscreen. The following code is used to select a dark or white background depending on the device mode settings:

 <color key="backgroundColor" systemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>

But how can I set a light or dark background for my text that also changes depending on the device mode settings:

<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Test" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="EcF-nC-k2o">
    <rect key="frame" x="137.5" y="309.5" width="100" height="48"/>
    <fontDescription key="fontDescription" type="system" pointSize="40"/>
    <color key="textColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
    <nil key="highlightedColor"/>
</label>

Hoping someone can give good advice on this because I spent a lot of time researching and could not find any suggestions at all.

Answer 1

When you set it to "Label Color" in Interface Builder, the system is automatically setting an appropriate color based on the interface style (light or dark).

Check out the Human Interface Guidelines for a reference of the available dynamic colors.