我正在尝试使用共享服务建立兄弟通信。我首先向您展示相关组件:
父组件:
import { SerializationService } from './serialization/serialization.service';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css'],
providers: [SerializationService]
})
export class AppComponent implements OnInit {
//irrelevant body
}
共享服务:
import { Injectable } from '@angular/core';
import { WorkspaceSerializer } from './WorkspaceSerializer';
@Injectable()
export class SerializationService {
serialize() {
//NEED TO CALL getData() IN DataComponent!!!
}
}
两个兄弟组成部分:
//Toolbar component:
import { SerializationService } from '../serialization/serialization.service';
@Component({
selector: 'toolbar-component',
templateUrl: './toolbar.component.html',
styleUrls: ['./toolbar.component.css']
})
export class ToolbarComponent {
constructor(private serializationService : SerializationService) { }
serialize() {
this.serializationService.serialize();
}
}
//Data Component:
import { SerializationService } from "../serialization/serialization.service";
@Component({
selector: 'pixi-component',
templateUrl: './pixi.component.html',
styleUrls: ['./pixi.component.css'],
})
export class DataComponent {
private data : String;
constructor(private operationService: OperationService,
private serializationService : SerializationService
){}
getData() : String {
return this.data;
}
}
您可以看到ToolbarComponent
调用serialize()
的{{1}}函数。该服务需要一些数据来序列化,因此需要从SerializationService
调用getData()
函数并捕获它的返回。这两个组件都是DataComponent
的孩子(他们是兄弟姐妹)。
我该怎么做?
答案 0 :(得分:0)
从服务调用组件的方法不是一个好主意,也许甚至不可能。您的组件使用服务,而不是相反。
但是你可以从DataComponent获取数据到ToolbarComponent,例如通过使用模板引用变量引用兄弟并使用例如TollbarComponent中的输入来接收数据:
app.component.html:
<toolbar-component [dataToSerialize] = "#dataComponent.getData()"></toolbar-component>
<pixi-component #dataComponent></pixi-component>
然后,您可以在ToolbarComponent的序列化方法中将数据传递给SerializationService:
export class ToolbarComponent {
constructor(private serializationService : SerializationService) { }
@Input() dataToSerialize;
serialize() {
this.serializationService.serialize(this.dataToSerialize);
}
}
根据应用程序的逻辑,您还可以在某些事件绑定上将数据传递给ToolbarComponent,例如在click事件上:
app.component.html:
<toolbar-component (click)="serialize(dataComponent.getData())"></toolbar-component>
<pixi-component #dataComponent></pixi-component>
//工具栏组件:
export class ToolbarComponent {
constructor(private serializationService : SerializationService) { }
serialize(data) {
this.serializationService.serialize(data);
}
}