Question

如何从angular2中的url获取查询参数

Answer 1

import {Router, ActivatedRoute, Params} from '@angular/router';
import {OnInit, OnDestroy, Component} from '@angular/core';
@Component({...})
export class MyComponent implements OnInit, OnDestroy {
constructor(private activatedRoute: ActivatedRoute) {}
ngOnInit() {
// subscribe to router event
this.activatedRoute.params.subscribe((params: Params) => {
let userId = params['userId'];
console.log(userId);
});
}
}
如果要获取查询参数，请将this.activatedRoute.params替换为this.activatedRoute.queryParams
关于不支持的说明
@Reto和@ codef0rmer非常正确地指出，根据官方文档，unsubscribe()内部的组件onDestroy()方法在这种情况下是不必要的。