单击按钮打开自动完成

Question

我正在Angular2应用程序中使用ofer的自动完成功能

https://github.com/oferh/ng2-completer

我想要这样一种行为，即自动完成不会在输入时自动打开，但我需要按一个按钮，只有在那时自动完成才会发出服务器请求并显示我试图实现CompleterData的下拉列表：

import { Http, Response } from "@angular/http";
import { Subject } from "rxjs/Subject";
import { HttpClient } from './shared';
import { CompleterData, CompleterItem } from 'ng2-completer';

export class AddressData extends Subject<CompleterItem[]> implements CompleterData {
    private url: string;

    constructor(private http: HttpClient, public erpIDParent: number, url: string) {
        super();
        this.url = url;
    }

    public setErpIDParent(erpIDParent: number) {
        this.erpIDParent = erpIDParent;
    }

    public search(term: string): void {
        console.log('searching');
        if (this.erpIDParent > 0) {
            this.http.get(`${this.url}${term}&erpIDParent=${this.erpIDParent}`)
                .map((res: Response) => {
                    // Convert the result to CompleterItem[]
                    let data = res.json();
                    let matches: CompleterItem[] = data.map((address: any) => {
                        return {
                            originalObject: address,
                            title: address.Name
                        }
                    });
                    console.log(matches);
                    this.next(matches);
                })
                .subscribe();
        }
    }

    public cancel() {
        // Handle cancel
    }
}

并将minSearchLength保持在1000

<ng2-completer placeholder="{{ 'NewOrder.typeToSearch' | translate }}" formControlName="address" [(ngModel)]="address" [datasource]="addressDataService" (selected)="addressSelected($event)" [minSearchLength]="1000"></ng2-completer>

所以它不会发送服务器请求，然后点击我的按钮，我有这个代码：

searchAddresses() {
        this.addressDataService.search(this.address);
    }

所以它会手动开始搜索，但它似乎不是我想要的方式。下拉列表可以立即显示和隐藏。有没有办法解决这个问题？