Question

我遇到canDeactivate（）的一些问题，只要它返回false，它就会改变窗口历史记录，就像它变为真，如果我点击后退按钮。我正在导航到其他URL或应用程序本身。

请帮帮我

Answer 1

Here是问题所在，但仍然没有解决。

作为一种解决方法，您可以手动将活动网址放回历史记录：

export class CanDeactivateGuard implements CanDeactivate<any> {
    constructor(
        private readonly location: Location,
        private readonly router: Router
    ) {}

    canDeactivate(component: any, currentRoute: ActivatedRouteSnapshot): boolean {
        if (myCondition) {
            const currentUrlTree = this.router.createUrlTree([], currentRoute);
            const currentUrl = currentUrlTree.toString();
            this.location.go(currentUrl);
            return false;
        } else {
            return true;
        }
    }
}

Answer 2

该问题仍然存在于 Angular 路由中，以下是对我有用的方法。

诀窍是使用 this.router.navigate([currentUrl], { skipLocationChange: true });

完整代码：

export class CanDeactivateGuard implements CanDeactivate<any> {

  constructor(
    private location: Location,
    private router: Router
  ) { }

  canDeactivate(component: any,
    currentRoute: ActivatedRouteSnapshot, 
    currentState: RouterStateSnapshot): boolean {

    if(canDeactivateCondition) {
      return true;
    } else {
      const currentUrl = currentState.url;
      if (this.location.isCurrentPathEqualTo(currentUrl)) {
        // https://github.com/angular/angular/issues/13586
        this.router.navigate([currentUrl], { skipLocationChange: true });
      } else {
        // A browser button has been clicked or location.back()/forward() invoked. Restore browser history
        history.pushState(null, null, location.href);
      }

      return false;
    }
  }
}

CanDeactivate更改窗口历史记录

2 个答案: