在组件A初始化值完成后，将组件A中的值传递给B.

Question

我使用从组件A到B的服务传递值

Servie A

public data: // is a object 
public processData() {
    // process about seconds and set value to data variable
}

组件B

private data; // is object
constructor(private servieA: ServieA) {} 
ngOnInit() {
    this.data = this.servieA.data;
}

但我的代码不起作用。请帮助我，非常感谢你。

Answer 1

您可以使用rxjs提供的Subject Observable

公共服务

transactionConfig.connectionProvider()

组件A

import {Subject} from 'rxjs/Subject';
export class CommonService {
  dataChanged = new Subject<any>();
}

组件B

export class AComponent implements onInit {
  constructor(commonService: CommonService) {}
  ngOnInit() {
    //pass data after some activity
    this.commonService.datachanged.next(somedata);
  }
}