如何在Angular 4中将router.navigate到相同的路由并捕获相同的事件? [英] How to router.navigate to same route in Angular 4 and catch the same event?
问题描述
好的,我在这里有两个用例:
Okay, I have two use cases for my question here:
-
我正在处理的应用程序具有
/ en / register
路线。当我位于根目录下并单击执行this.router.navigate([this.routeParams.lang,'register']);
的按钮时,一切都很好一切都很好,这在构造函数中打开了一个模态(无论如何还是ngOnInit),其中($('#modalRegister')为任何))。modal('show');
。
I'm working on an application which has a
/en/register
route. It all works good when I'm at the root and I click a button that doesthis.router.navigate([this.routeParams.lang, 'register']);
and it's all good, this opens up a modal in the constructor (or ngOnInit, anyways) with($('#modalRegister') as any).modal('show');
.
一切正常,但是如果我关闭模式,路线仍然是 / en / register /
(是的,我可以转到 / en
,但是在建议使用之前请看用例#2),所以当我单击按钮时,它不起作用任何东西。构造函数或ngOnInit都没有被调用,甚至没有 route.params.subscribe()或 route.url.subscribe()认为他们应该...)。
It all works good, but if I close the modal, the route is still /en/register/
(yeah I can make it go to /en
but see the use case #2 before you suggest this), so when I click the button, it doesn't do anything. Neither the constructor or ngOnInit are being called, not even route.params.subscribe() or route.url.subscribe() (which I think they should...).
在同一应用程序中,我有一个按钮可以进行搜索并在地图中居中一些标记(在 / en / search / blah
)。如果我位于索引页面或(如果我更改搜索查询),那就太好了。但是,如果用户将地图拖到其他地方并希望将相同的标记再次居中,我也会执行 this.router.navigate(['search',this.searchQuery]);
,如果最终还是相同的路线(例如,单击搜索按钮两次),则它什么也没做。
In the same application, I have a button that does a search and centers some markers in a map (in /en/search/blah
). That's all good if I'm in the index page or if I change the search query. However, if the user drags the map somewhere else and wants to have the same markers centered again, I also do this.router.navigate(['search', this.searchQuery]);
and if it ends up being the same route (click the search button twice, for instance) it doesn't do anything.
虽然我同意这很好,所以如果URL不变,则不会重新创建组件,但这是一个糟糕的设计,因为在UI-router中,您可以做同样的事情并且可以正常工作(因为据我所记得)。
While I agree it's good so the components don't get recreated if the URL hasn't changed, this is a bad design because in UI-router you could do the same thing and it'd work (as far as I can remember).
因此,在Angular 4中,当正在使用相同的URL时,如何在路由组件的构造函数/ ngOnInit中运行相同的代码告诉要导航到?或者如何检测URL是否相同并采取相应措施? (尽管我仍然认为这是一个糟糕的设计,但无论如何...)。
So, in Angular 4, how do I run the same code in the constructor/ngOnInit of the route's component when the same URL is being told to be navigated to? or how do I detect if the URL is the same and act accordingly? (although I still think it's bad design, but anyway...).
任何建议都将不胜感激。谢谢!
Any advice is greatly appreciated. Thanks!
推荐答案
当我需要重新加载当前组件的构造函数和ngOnInit函数时,
是我唯一的解决方案发现是一种解决方法:
When I needed to "reload" the current component's constructor and ngOnInit functions, the only solution I found was kind of a workaround:
我使用了 this.router.navigate返回承诺的事实。
所以我导航到其他地方,然后返回。这有点丑陋,但可以正常使用,并且用户界面不受影响:
I used the fact that "this.router.navigate" returns a promise. So I navigated somewhere else, and returned. It's a bit ugly but it works and the UI is not affected:
this.router.navigate(..[somewhere else]..)
.then(()=>{this.router.navigate(..back..)})
希望有帮助。
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