【Harmony OS】鸿蒙 DevEco Studio 设置状态栏，调用setWindowSystemBarProperties不生效

import window from '@ohos.window';

export default {
    data: {
        title: 'World'
    },
    setSystemBar() {
        var windowClass = null;
        window.getTopWindow((err, data) => {
            windowClass = data;
            var SystemBarProperties = {
                statusBarColor: '#ca0522',
                navigationBarColor: '#0456fa',
                //以下两个属性从API Version7开始支持
                isStatusBarLightIcon: true,
                isNavigationBarLightIcon: false
            };
            windowClass.setSystemBarProperties(SystemBarProperties, (err, data) => {
                if (err) {
                    console.error('Failed to set the system bar properties. Cause: ' + JSON.stringify(err));
                    return;
                }
                console.info('Succeeded in setting the system bar properties. Data: ' + JSON.stringify(data));
            });
        });
    }
}