以下是示例,我在@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}
]}
中定义了一些路由:
UserComponent
并且在@RouteConfig([
{path:'/info', name: 'UserInfo', component: UserInfoComponent, useAsDefault: true},
{path:'/order', name: 'UserOrder', component: UserOrderComponent},
{path:'/detail', name: 'UserDetail', component: UserDetailComponent}
]}
我有另一条定义如下的路线:
AppComponent
UserComponent
和//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>
中都定义了两个单独的导航:
UserComponent
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UserInfoComponent
中获取这些更改,因此我想将逻辑放入这些子组件(UserOrderComponent
,UserDetailComponent
和echo $PATH
)。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?感谢
答案 0 :(得分:5)
路由器已附带lifecycle hooks,CanDeactivate Interface
允许/拒绝导航的钩子是@Component({
selector:'route-2',
template:'route 2 template'
})
class SecondRoute{
routerCanDeactivate(){
return false; // false stops navigation, true continue navigation
}
}
。如果从此函数返回false,它将停止导航。
示例With Plunker :(在弹道中,路线2永远不会允许导航。你不能回到路线1)
SELECT
*
FROM
(
SELECT
page,
count(page) countOfTable1
FROM table1
WHERE date = '2016-04-04'
GROUP BY page) firstTable
INNER JOIN
(
SELECT
page,
count(page) countOfTable2
FROM table2
WHERE date = '2016-04-04'
GROUP BY page ) secondTable
ON firstTable.page = secondTable.page ;