/Users/qt/work/qt/qtdeclarative/src/quickcontrols/ios/qquickiostheme.mm:40:43: error: receiver 'UITraitCollection' is a forward class and corresponding @interface may not exist [-Werror,-Wreceiver-forward-class]
    UITraitCollection *traitCollection = [UITraitCollection traitCollectionWithUserInterfaceStyle:style];
                                          ^~~~~~~~~~~~~~~~~
/Applications/Xcode15.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS17.4.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIColor.h:21:8: note: forward declaration of class here
@class UITraitCollection;
       ^
/Users/qt/work/qt/qtdeclarative/src/quickcontrols/ios/qquickiostheme.mm:40:61: error: class method '+traitCollectionWithUserInterfaceStyle:' not found (return type defaults to 'id') [-Werror,-Wobjc-method-access]
    UITraitCollection *traitCollection = [UITraitCollection traitCollectionWithUserInterfaceStyle:style];
                                                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.