Angular 从共享服务中调用组件的函数
我正试图通过使用共享服务来建立兄弟通信。首先,我将向您展示相关组件:Angular 从共享服务中调用组件的函数,angular,typescript,angular2-services,Angular,Typescript,Angular2 Services,我正试图通过使用共享服务来建立兄弟通信。首先,我将向您展示相关组件: //Toolbar component: import { SerializationService } from '../serialization/serialization.service'; @Component({ selector: 'toolbar-component', templateUrl: './toolbar.component.html', styleUrls: ['./toolbar
//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;
}
}
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!!!
}
}
两个同级组件:
//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SerializationService
的serialization()函数。该服务需要一些数据进行序列化,因此它需要从DataComponent
调用getData()
函数并捕获它的返回。这两个组件都是AppComponent的子组件(它们是同级)
如何才能做到这一点?从服务调用组件的方法不是一个好主意,甚至可能根本不可能。您的组件使用服务,而不是相反
但您可以将数据从DataComponent获取到ToolbarComponent,例如,通过使用模板引用变量引用同级,并使用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>
<toolbar-component (click)="serialize(dataComponent.getData())"></toolbar-component>
<pixi-component #dataComponent></pixi-component>
根据应用程序的逻辑,您还可以通过某些事件绑定将数据传递给ToolbarComponent,例如单击事件:
app.component.html:
<toolbar-component [dataToSerialize] = "#dataComponent.getData()"></toolbar-component>
<pixi-component #dataComponent></pixi-component>
<toolbar-component (click)="serialize(dataComponent.getData())"></toolbar-component>
<pixi-component #dataComponent></pixi-component>
我非常喜欢这一点,尤其是行(单击)=“serialize(dataComponent.getData())”
以按需获取所需的数据。非常感谢。