在Angular中,模块间通信可以通过以下几种方式实现:
// 创建一个服务
import { Injectable } from '@angular/core';
@Injectable({
providedIn: 'root'
})
export class DataService {
private data: any;
constructor() { }
setData(data: any) {
this.data = data;
}
getData() {
return this.data;
}
}
// 在组件中使用服务
import { Component } from '@angular/core';
import { DataService } from './data.service';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
constructor(private dataService: DataService) { }
setData() {
this.dataService.setData('Hello from AppComponent');
}
getData() {
console.log(this.dataService.getData());
}
}
// 父组件
import { Component } from '@angular/core';
@Component({
selector: 'app-parent',
template: `
<app-child [inputData]="parentData" (outputData)="receiveData($event)"></app-child>
`,
})
export class ParentComponent {
parentData = 'Hello from ParentComponent';
receiveData(data: any) {
console.log('Data received from child:', data);
}
}
// 子组件
import { Component, Input, Output, EventEmitter } from '@angular/core';
@Component({
selector: 'app-child',
template: `
<button (click)="sendData()">Send Data</button>
`,
})
export class ChildComponent {
@Input() inputData: any;
@Output() outputData = new EventEmitter<any>();
sendData() {
this.outputData.emit('Hello from ChildComponent');
}
}
// 在路由配置中定义参数
const routes: Routes = [
{ path: 'componentA/:id', component: ComponentA },
{ path: 'componentB', component: ComponentB },
];
// 在ComponentA中导航到ComponentB并传递参数
import { Component } from '@angular/core';
import { Router } from '@angular/router';
@Component({
selector: 'app-component-a',
template: `
<button (click)="navigateToComponentB()">Go to Component B</button>
`,
})
export class ComponentA {
constructor(private router: Router) { }
navigateToComponentB() {
this.router.navigate(['/componentB', 1]);
}
}
// 在ComponentB中获取路由参数
import { Component, OnInit } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
@Component({
selector: 'app-component-b',
template: `
<p>Received ID: {{ id }}</p>
`,
})
export class ComponentB implements OnInit {
id: number;
constructor(private route: ActivatedRoute) { }
ngOnInit() {
this.route.params.subscribe(params => {
this.id = +params['id'];
});
}
}
// 在组件A中设置数据
import { Component } from '@angular/core';
@Component({
selector: 'app-component-a',
template: `
<button (click)="setData()">Set Data</button>
`,
})
export class ComponentA {
setData() {
localStorage.setItem('data', 'Hello from Component A');
}
}
// 在组件B中获取数据
import { Component } from '@angular/core';
@Component({
selector: 'app-component-b',
template: `
<p>Received Data: {{ data }}</p>
`,
})
export class ComponentB {
data: string;
constructor() {
this.data = localStorage.getItem('data');
}
}
这些方法可以根据实际需求进行选择,以实现模块间的通信。
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