import { SingletonMixin } from '../base/SingletonMixin';
import { UIPage } from '../UI/page/UIPage';
/**
 * UI管理器
 */
export declare class UIManager extends SingletonMixin {
    static get Instance(): UIManager;
    private currentPage;
    init(): void;
    onForeground(): void;
    onBackground(): void;
    changeCurrentPage(page: UIPage, isReplace?: boolean): Promise<void>;
}