qt.permissions: Could not find permission plugin for QLocationPermission.

KejPi

Hi there,

I am developing application on MacOS with Qt 6.6.3 and I want to ask for location permission, however if I do so, I get this message in terminal output:

qt.permissions: Could not find permission plugin for QLocationPermission. Please make sure you have included the required usage description in your Info.plist

This is my code:

void TIIDialog::startLocationUpdate()
{
    // ask for permission
#if QT_CONFIG(permissions)
    QLocationPermission locationsPermission;
    locationsPermission.setAccuracy(QLocationPermission::Precise);
    locationsPermission.setAvailability(QLocationPermission::Always);
    switch (qApp->checkPermission(locationsPermission)) {
    case Qt::PermissionStatus::Undetermined:
        qApp->requestPermission(locationsPermission, this, []() { qDebug() << "permission request completed"; } );
        qDebug() << "Undetermined";
        return;
    case Qt::PermissionStatus::Denied:
        qDebug() << "Denied";
        return;
    case Qt::PermissionStatus::Granted:
        qDebug() << "Granted";
        break; // Proceed
    }
#endif
    // start location update
}

This is may Info.plist in the app bundle:

$ cat AbracaDABra.app/Contents/Info.plist 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>CFBundleInfoDictionaryVersion</key>
    <string>6.0</string>
    <key>CFBundlePackageType</key>
    <string>APPL</string>
    <key>CFBundleDevelopmentRegion</key>
    <string>English</string>
    <key>CFBundleExecutable</key>
    <string>AbracaDABra</string>
    <key>CFBundleGetInfoString</key>
    <string></string>
    <key>CFBundleIconFile</key>
    <string>appIcon.icns</string>
    <key>CFBundleIdentifier</key>
    <string></string>
    <key>CFBundleShortVersionString</key>
    <string></string>
    <key>CFBundleName</key>
    <string></string>
    <key>CFBundleShortVersionString</key>
    <string></string>
    <key>CFBundleVersion</key>
    <string>_</string>
    <key>CSResourcesFileMapped</key>
    <true/>
    <key>NSHumanReadableCopyright</key>
    <string>© 2019-2024 Petr Kopecký - MIT License</string>
    <key>NSPrincipalClass</key>
    <string>NSApplication</string>
    <key>NSHighResolutionCapable</key>
    <string>True</string>
    <key>LSMinimumSystemVersion</key>
    <string>$(MACOSX_DEPLOYMENT_TARGET)</string>
    <key>CFBundleAllowMixedLocalizations</key>
    <true/>
    <key>NSLocationUsageDescription</key>
    <string>AbracaDABra would like to access your location for trasmitters visualisation.</string>
</dict>
</plist>

And I have this in my CMakeLists.txt:

# Set a custom plist file for the app bundle
if(APPLE AND APPLE_APP_BUNDLE)
    set_target_properties(${TARGET} PROPERTIES
        MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/resources/Info.plist.in
        MACOSX_BUNDLE_BUNDLE_VERSION       "${PROJECT_VERSION}_${PROJECT_GIT_REV}"
        MACOSX_BUNDLE_SHORT_VERSION_STRING "${PROJECT_VERSION}"
    )
    if (NOT CMAKE_GENERATOR STREQUAL "Xcode")
        # Need to sign application for location permissions to work
        add_custom_command(TARGET ${TARGET} POST_BUILD COMMAND codesign -s - ${TARGET}.app)
    endif()
endif(APPLE AND APPLE_APP_BUNDLE)

What am I doing wrong? Thank you!

KejPi

OK, I will answer myself, I hope it helps others in future. In order to make the permissions work you need to have this in CMakeLists.txt (I did not need it so far):

## This is required for localization permissions to work
if(QT_VERSION_MAJOR EQUAL 6)
    qt_finalize_executable(${TARGET})
endif()

thierry

I still cannot make this work. I have even tried to build Qt 6.7.2 from sources to see and the weatherinfo example just exhibits this problem. Any help is very welcome.