Question

据我所知，有许多方法可以在父子组件和父组件之间进行交互，例如EventEmitter。但有没有办法在不是父子关系或子关系的组件之间进行交互，这与为此目的使用服务不同？

Answer 1

使用此课程

txtView.setText(parseDate("06/03/2017 01:20:00","dd/MM/yyyy hh:mm:ss","dd/MM/yyyy hh:mm:ss"));

public static String parseDate(String Date, String CurrentPattern, String OutputPattern) {

    SimpleDateFormat sdf = new SimpleDateFormat(CurrentPattern, Locale.getDefault());

    try {
        Date startDate = increaseDate(sdf.parse(Date));
        sdf.applyPattern(OutputPattern);
        return sdf.format(startDate);
    } catch (Exception e) {
        return "";
    }
}

public static Date increaseDate(Date origDate) {

    final Calendar calendar = Calendar.getInstance();

    calendar.setTime(origDate);
    calendar.add(Calendar.SECONDS, +1);
    Date newDate = calendar.getTime();
    return newDate;
}

并订阅

等组件中的事件

import { EventEmitter, Injectable } from "@angular/core";
@Injectable()
export class SharedService {
  private emitter: EventEmitter<any>;
  constructor() {
    this.emitter = new EventEmitter<any>();
  }
  getEmitter(): EventEmitter<any> {
    return this.emitter;
  }
  emit(data: any): void {
    this.emitter.emit(data);
  }
}

不要忘记将其添加到NgModule并将其用作服务。

Angular 2.如何在不同级别组件之间进行交互？

1 个答案: