取消组件销毁的本地请求

我在Angular中做的一件事是使用RXjs进行请求,使用订阅,并将这些订阅添加到我们迭代并在销毁时取消的数组中,如下所示:

import { Component, OnInit, OnDestroy} from "@angular/core";
import { ActivatedRoute }              from "@angular/router";

export class AppComponent implements OnInit, OnDestroy {
    private subscriptions = [];

    constructor(private route AppRoute) {}

    ngOnInit() {
        this.subscriptions.push(this.route.data.subscribe());
    }

    ngOnDestroy() {
        for (let subscription of this.subscriptions) {
            subscription.unsubscribe();
        }
    }
}

为什么不把创建的对象分配给一个不会被破坏的对象呢?通过这种方式,你的行为得到了维护,你可以做一个简单的检查来防止任何错误。

...
var baseObj = {};
baseObj.someObject = create();
vm.search = someFactory.getHttp(params).then(result => {
    if (baseObj.someObject != null) {
        baseObj.someObjet.prop = result;
    }
});

vm.$onDestroy = () => {
  baseObj.someObject = null;
}