我想在Angular2服务中编写一个简单的切换.
因此,我需要观察的主题的当前值(见下文).
import {Injectable} from 'angular2/core';
import {Subject} from 'rxjs/Subject';
@Injectable()
export class SettingsService {
private _panelOpened = new Subject<boolean>();
panelOpened$= this._panelOpened.asObservable();
togglePanel() {
this._panelOpened.next(!this.panelOpened$);
}
}
如何从_panelOpened / panelOpened $中获取当前值？
谢谢.
解决方法
好像你在寻找
BehaviorSubject
private _panelOpened = new BehaviorSubject<boolean>(false);
如果您订阅,则将最后一个值作为第一个事件.
togglePanel() {
this.currentValue = !this.currentValue;
this._panelOpened.next(this.currentValue);
}
