我正在尝试在angular 2中实现延迟加载。
我已经通过以下链接创建了延迟加载。
我有两个组件,例如home1和home2。home1是头条新闻,home2用于列出其他新闻。
第一次时,只会显示home1。
用户滚动页面后,必须将home2加载到home1中(就像在MVC中调用部分视图一样)。
我尝试通过在home1中调用home2作为 <app-home2-list></app-home2-list>
但出现错误。
我不怎么在home1 html中调用home2 html ?.还有其他方法可以实现吗?
app.module.ts:
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { MenuComponent } from './menu.component';
import { HomeComponent } from './home/home.component';
import { Const_Routing } from './app.routing';
import { HttpModule } from '@angular/http';
import { Home2ListComponent } from './home2/home2-list/home2-list.component';
import { Home1ListComponent } from './home1/home1-list/home1-list.component';
@NgModule({
declarations: [
AppComponent,
MenuComponent,
HomeComponent,
Home1ListComponent,
Home2ListComponent
],
imports: [
BrowserModule,
Const_Routing,
HttpModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
home1-list.component.ts和home2-list.component.ts(两个代码相同,api调用不同):
import { Component, OnInit, ViewChild, ElementRef } from '@angular/core';
import { ViewEncapsulation } from '@angular/compiler/src/core';
import { DatePipe } from '@angular/common';
import { Router } from '@angular/router';
import '../../../assets/scripts/endlessriver.js';
import * as $ from 'jquery';
import { SharedService } from '../../Services/shared.service';
import { Home1Service } from './home1.service';
import { Home2ListComponent } from '../../home2/home2-list/home2-list.component';
declare var jQuery: any;
@Component({
selector: 'app-home1-list',
templateUrl: './home1-list.component.html',
styleUrls: ['./home1-list.component.css','../../../assets/styles/common.css','../../../assets/styles/endlessriver.css'],
providers: [Home1Service,SharedService]
})
export class Home1ListComponent implements OnInit {
constructor(public Service: Home1Service,public CommonService:SharedService) { }
@ViewChild('marqueeID') input: ElementRef;
HomeList:any;
HomeList1:any;
HomeList2:any;
HomeList3:any;
sectionName:string;
datetime:string;
productId:number=2;
getListingData(sectionName)
{
this.Service.getListingNews(sectionName,15).subscribe(
data => {
this.HomeList = data.map(e => {
return { SectionName:e.ChildName,ArticleId:e.ArticleId, HeadLine: e.HeadLine, Abstract: e.Abstract, ImageLink: e.ImageLink ,UpdatedDate:this.CommonService.getDateFormat(new Date(e.UpdatedDate),'others').toString()};
})
},
error => { console.log(error) });
this.Service.getListingNews("world",5).subscribe(
data => {
this.HomeList1 = data.map(e => {
return { Heading:'world',SectionName:e.ChildName,ArticleId:e.ArticleId, HeadLine: e.HeadLine, Abstract: e.Abstract, ImageLink: e.ImageLink ,UpdatedDate:this.CommonService.getDateFormat(new Date(e.UpdatedDate),'others').toString()};
})
},
error => { console.log(error) });
this.Service.getListingNews("national",5).subscribe(
data => {
this.HomeList2 = data.map(e => {
return {Heading:'national', SectionName:e.ChildName,ArticleId:e.ArticleId, HeadLine: e.HeadLine, Abstract: e.Abstract, ImageLink: e.ImageLink ,UpdatedDate:this.CommonService.getDateFormat(new Date(e.UpdatedDate),'others').toString()};
})
},
error => { console.log(error) });
this.Service.getListingNews("state",5).subscribe(
data => {
this.HomeList3 = data.map(e => {
return { Heading:'state',SectionName:e.ChildName,ArticleId:e.ArticleId, HeadLine: e.HeadLine, Abstract: e.Abstract, ImageLink: e.ImageLink ,UpdatedDate:this.CommonService.getDateFormat(new Date(e.UpdatedDate),'others').toString()};
})
},
error => { console.log(error) });
}
getHomeList(name: string)
{
if(name=="0")
{
return this.HomeList1;
}
else if(name=="1")
{
return this.HomeList2;
}
else
{
return this.HomeList3;
}
}
ngOnInit() {
this.datetime=this.CommonService.getDateFormat(new Date(),'home').toString();
this.getListingData('TopNews');
}
ngAfterViewInit() {
jQuery(this.input.nativeElement).endlessRiver({
});
$( document ).ready(function() {
$('.brkngBody').show();
});
}
}
home1.module.ts:
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Home1RoutingModule } from './home1-routing.module';
import { Home1ListComponent } from './home1-list/home1-list.component';
import { Home2ListComponent } from '../home2/home2-list/home2-list.component';
import { Home2RoutingModule } from '../home2/home2-routing.module';
import { Home2Module } from '../home2/home2.module';
@NgModule({
imports: [
CommonModule,
Home1RoutingModule,
Home2ListComponent
],
exports:[
Home2ListComponent
],
declarations: [Home1ListComponent]
})
export class Home1Module { }
home2.module.ts:
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Home2RoutingModule } from './home2-routing.module';
import { Home2ListComponent } from './home2-list/home2-list.component';
@NgModule({
imports: [
CommonModule,
Home2RoutingModule
],
declarations: [Home2ListComponent]
})
export class Home2Module { }
home1-routing.module.ts:
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { Home1ListComponent } from './home1-list/home1-list.component';
const routes: Routes = [ {
path: '',
component: Home1ListComponent
}];
@NgModule({
imports: [RouterModule.forChild(routes)],
exports: [RouterModule]
})
export class Home1RoutingModule { }
尝试以下代码段。
//home2.module.ts:
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Home2RoutingModule } from './home2-routing.module';
import { Home2ListComponent } from './home2-list/home2-list.component';
@NgModule({
imports: [
CommonModule,
Home2RoutingModule
],
exports:[Home2ListComponent],
declarations: [Home2ListComponent]
})
export class Home2Module { }
//Home1.module.ts
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Home1RoutingModule } from './home1-routing.module';
import { Home1ListComponent } from './home1-list/home1-list.component';
import { Home2ListComponent } from '../home2/home2-list/home2-list.component';
import { Home2RoutingModule } from '../home2/home2-routing.module';
import { Home2Module } from '../home2/home2.module';
@NgModule({
imports: [
CommonModule,
Home1RoutingModule,
Home2ListComponent
],
exports:[
Home1ListComponent
],
declarations: [Home1ListComponent]
})
export class Home1Module { }
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