模板解析错误 - Angular 5

Question

我已多次阅读并遇到此问题。我不确定这是否与Ang 5有关。我试图降级到4.目前为止没有运气。任何想法。

根据我的阅读，我尝试解决以下问题是在app.module.ts中添加：

import { CommonModule } from '@angular/common';  
import { ErrorHandler, NgModule, NO_ERRORS_SCHEMA,CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';

控制台错误：

  

＆＃34;属性绑定ngForIn未被嵌入式模板上的任何指令使用。确保属性名称拼写正确，所有指令都列在＆＃34; @ NgModule.declarations＆＃34; ....＆＃34;

这是我的代码

home.html的

<ion-header>
  <ion-navbar>
    <ion-title>
      {{eventItem.title}}
    </ion-title>
  </ion-navbar>
</ion-header>

<ion-content padding>
  <p>{{eventItem.title}}</p>
  <p>{{tasktItem.title}} - {{tasktItem.status}}</p>
  <p>{{checkListItem.title}}</p>

  <ion-list>
    <ion-item *ngFor="let item in checkListItem.tasks">
        {{item.title}}
    </ion-item>
  </ion-list>
</ion-content>

home.ts

import { Component } from '@angular/core';
import { CommonModule } from '@angular/common';  
import { NavController } from 'ionic-angular';
import { Event, Task, Checklist } from '../../app/shared/event';
import { Item, ItemType, Priority } from '../../app/shared/item';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {
  string:string
  array:any[]
  eventItem:Event;
  taskItem:Task;
  checkListItem:Checklist

  constructor(public navCtrl: NavController) {
    this.array = []

    this.eventItem = new Event(10, "this is a new event", new Date(), ItemType.Event)
    this.taskItem = new Task(10,  "this is a new task", new Date(), ItemType.Task)
    this.checkListItem = new Checklist(12, "this is a new checklist", new Date(), ItemType.Checklist)

    for (let i = 1; i <= 10 ; i++) {
       let task = new Task(i, `this is task number:${i}`, new Date(), ItemType.Task)
       this.array.push(task)
    }

    this.checkListItem.tasks = this.array

    this.eventItem.description = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum eu augue leo. Duis consequat urna quis egestas porttitor. Sed in rhoncus velit. Vivamus euismod vestibulum nisi, eu ornare erat volutpat in. Quisque commodo nisi urna, non porttitor eros porttitor volutpat. Praesent malesuada ultrices enim ut interdum. Ut suscipit sed lorem ac facilisis. Aenean et sapien quis diam hendrerit rhoncus. Praesent ac blandit libero. Duis varius congue lorem sit amet pharetra. Etiam dictum leo eget tincidunt eleifend. Suspendisse volutpat justo augue, vitae pulvinar turpis cursus at."

    this.taskItem.description = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum eu augue leo. Duis consequat urna quis egestas porttitor. Sed in rhoncus velit. Vivamus euismod vestibulum nisi, eu ornare erat volutpat in. Quisque commodo nisi urna, non porttitor eros porttitor volutpat. Praesent malesuada ultrices enim ut interdum. Ut suscipit sed lorem ac facilisis. Aenean et sapien quis diam hendrerit rhoncus. Praesent ac blandit libero. Duis varius congue lorem sit amet pharetra. Etiam dictum leo eget tincidunt eleifend. Suspendisse volutpat justo augue, vitae pulvinar turpis cursus at."


  }


}

这是我的app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { CommonModule } from '@angular/common';  
import { ErrorHandler, NgModule, NO_ERRORS_SCHEMA,CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
import { IonicApp, IonicErrorHandler, IonicModule } from 'ionic-angular';
import { SplashScreen } from '@ionic-native/splash-screen';
import { StatusBar } from '@ionic-native/status-bar';

import { MyApp } from './app.component';
import { HomePage } from '../pages/home/home';


@NgModule({
  declarations: [
    MyApp,
    HomePage
  ],
  imports: [
    BrowserModule,
    IonicModule.forRoot(MyApp)
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    HomePage
  ],
  schemas: [NO_ERRORS_SCHEMA,CUSTOM_ELEMENTS_SCHEMA],
  providers: [
    StatusBar,
    SplashScreen,
    {provide: ErrorHandler, useClass: IonicErrorHandler}
  ]
})
export class AppModule {}

您认为这是一个错误，是否应该很快修复？我不记得过去有过与语法相关的错误。我真的找不到解决方法。谢谢你的帮助。

Answer 1

试试这个：

    <ion-item *ngFor="let item of checkListItem.tasks">

而不是：

    <ion-item *ngFor="let item in checkListItem.tasks">

for ... in 循环对象的属性。

for ... 循环数组。

来自Angular docs：NgForOf