Cordova angular应用程序上的硬件后退按钮按下,打开上次打开的视图

window.history.back();

this.router.navigate([previousState]);

但这只在我的导航栏按钮点击时才起作用。在硬按钮单击时,我被导航回,但我的状态不会再次获取。

@Injectable()
export class AppStateService {
private menuOpen: boolean = false;
private headerTitle: string = "";
private offlineState: boolean = false;


public constructor(private router: Router) {
    document.addEventListener("backbutton", () => {
        this.back(true);
    }, false);
}

public back(hardwareClick?: boolean): void {

    var routes: string[] = [
        'Login',
        'Main'
    ];
    for (var i of routes) {
        var route = this.router.generate([i]);
        if (this.router.isRouteActive(route)) {
            this.exitApp();
            return;
        }
    }

    var  previousState = CordovaService.getPreviousState();
    this.router.navigate([previousState]);

}

不过,当导航栏后退按钮单击时,从B到A工作正常 有什么问题吗?