如果我在浏览器控制台中执行此操作,则构造函数似乎不会被调用 –
Observable.create(observer =>
console.log('this is the observer'); //doesn't gets logged
this.alertObserver = observer
);
或这个 ：-
new Observable(observer =>
console.log('this is the observer'); //doesn't gets logged
this.alertObserver = observer
);
我试过通过导入Observer
import {Observable} from 'rxjs/Observable';
和
import {Observable} from 'rxjs/Rx';
但没有任何帮助.
有什么建议吗？
解决方法
Rx observables是延迟加载的.您至少需要一个订户.
尝试：
var observable = Observable.create(observer =>
console.log('this is the observer');
this.alertObserver = observer
);
observable.subscribe();
