javascript – Angular 2:当我离开路线时如何应用回调
作者:互联网
这是一个例子,我在AppComponent中定义了一些路由:
@RouteConfig([
{path:'/', name: 'Index', component: IndexComponent, useAsDefault: true},
{path:'/:id/...', name: 'User', component: UserComponent},
{path:'/plan', name: 'Plan', component: PlanComponent},
{path:'/foo', name: 'Foo', component: FooComponent}
]}
在UserComponent中我有另一个定义如下的路由:
@RouteConfig([
{path:'/info', name: 'UserInfo', component: UserInfoComponent, useAsDefault: true},
{path:'/order', name: 'UserOrder', component: UserOrderComponent},
{path:'/detail', name: 'UserDetail', component: UserDetailComponent}
]}
AppComponent和UserComponent中定义了两个单独的导航:
//AppComponent:
<a [routerLink]="['User']">User</a>
<a [routerLink]="['Plan']">Plan</a>
<a [routerLink]="['Foo']">Foo</a>
--------------------------------------------
//UserComponent:
<a [routerLink]="['UserInfo']">User Info</a>
<a [routerLink]="['UserOrder']">User Order</a>
<a [routerLink]="['UserDetail']">User Detail</a>
我期望的行为是:
当用户点击这些导航时,会出现一个模态,询问用户是否在离开此路线前确认保存.如果是,请自动保存用户的更改.
由于似乎无法在UserComponent中获取这些更改,我想将逻辑放入这些子组件(UserInfoComponent,UserOrderComponent和UserDetailComponent).那么,当用户将当前路由留在子组件内时,有什么方法可以触发回调?如果没有,有没有其他方法来实现这一目标?谢谢
解决方法:
路由器已经配备lifecycle hooks,CanDeactivate Interface
允许/拒绝导航的钩子是routerCanDeactivate(nextInstruction,prevInstruction){…}.如果从此函数返回false,它将停止导航.
例With Plunker :(在探测器中,路线2永远不会允许导航.你不能回到路线1)
@Component({
selector:'route-2',
template:'route 2 template'
})
class SecondRoute{
routerCanDeactivate(){
return false; // false stops navigation, true continue navigation
}
}
标签:javascript,angular2-routing,angular 来源: https://codeday.me/bug/20190608/1200819.html