Ionic2 离子2模态。内联模板-类型错误：无法读取属性'；项目'；未定义的

我想从我的事件页面显示一个模式：

//event.html
<form [formGroup]="newEventForm">

      <ion-item>
        <ion-label floating>Title</ion-label>
        <ion-input formControlName="title" type="text"></ion-input>
      </ion-item>

      <ion-item>
        <ion-label>Sport</ion-label>
        <ion-select formControlName="sport">
          <ion-option value="Running">Running</ion-option>
          <ion-option value="Football">Football</ion-option>
          <ion-option value="Yoga">Yoga</ion-option>
          <ion-option value="Golf">Golf</ion-option>
        </ion-select>
      </ion-item>

      <ion-item>
        <ion-label>Début</ion-label>
        <ion-datetime displayFormat="DD MMM YYYY" formControlName="timeStarts"></ion-datetime>
      </ion-item>

      <ion-item>
        <ion-label>Où</ion-label>
        <ion-input formControlName="location" type="text" (click)="presentNewLocationModal()"></ion-input>
      </ion-item>

然后写下我的情态。 视图：

单击显示模式的“où”输入时，我会出现以下错误：

EXCEPTION: Error in ./NewLocationModal class NewLocationModal - inline template:22:14 caused by: Cannot read property 'items' of undefined

TypeError: Cannot read property 'items' of undefined
    at CompiledTemplate.proxyViewClass.View_NewLocationModal0.detectChangesInternal (/AppModule/NewLocationModal/component.ngfactory.js:363:46)
    at CompiledTemplate.proxyViewClass.AppView.detectChanges (http://localhost:8100/build/main.js:117531:14)
    at CompiledTemplate.proxyViewClass.DebugAppView.detectChanges (http://localhost:8100/build/main.js:117726:44)
    at CompiledTemplate.proxyViewClass.AppView.internalDetectChanges (http://localhost:8100/build/main.js:117516:18)
    at CompiledTemplate.proxyViewClass.View_NewLocationModal_Host0.detectChangesInternal (/AppModule/NewLocationModal/host.ngfactory.js:29:19)
    at CompiledTemplate.proxyViewClass.AppView.detectChanges (http://localhost:8100/build/main.js:117531:14)
    at CompiledTemplate.proxyViewClass.DebugAppView.detectChanges (http://localhost:8100/build/main.js:117726:44)
    at ViewContainer.detectChangesInNestedViews (http://localhost:8100/build/main.js:117863:37)
    at CompiledTemplate.proxyViewClass.View_ModalCmp0.detectChangesInternal (/IonicModule/ModalCmp/component.ngfactory.js:46:14)
    at CompiledTemplate.proxyViewClass.AppView.detectChanges (http://localhost:8100/build/main.js:117531:14)
    at CompiledTemplate.proxyViewClass.DebugAppView.detectChanges (http://localhost:8100/build/main.js:117726:44)
    at CompiledTemplate.proxyViewClass.AppView.internalDetectChanges (http://localhost:8100/build/main.js:117516:18)
    at CompiledTemplate.proxyViewClass.View_ModalCmp_Host0.detectChangesInternal (/IonicModule/ModalCmp/host.ngfactory.js:30:19)
    at CompiledTemplate.proxyViewClass.AppView.detectChanges (http://localhost:8100/build/main.js:117531:14)
    at CompiledTemplate.proxyViewClass.DebugAppView.detectChanges (http://localhost:8100/build/main.js:117726:44)

构造函数被调用，但不知何故，代码的一部分试图访问我自己不使用的“items”变量。。。有什么想法吗

顺便说一下，我不明白为什么在我使用templateUrl时会说“内联模板”

****编辑**** 只有当我将templateUrl用于模式时，错误才会发生。如果我用“template”实现.ts文件中的视图，那么没有错误，正如前面所述，问题似乎是由于与Ionic相关的错误。升级到最新版本解决了这个问题

<ion-header>
  <ion-toolbar>
    <ion-title>
      Choisir un lieu
    </ion-title>
    <ion-buttons start>
      <button ion-button (click)="dismiss()">
        <span ion-text color="primary" showWhen="ios">Cancel</span>
        <ion-icon name="md-close" showWhen="android, windows"></ion-icon>
      </button>
    </ion-buttons>
  </ion-toolbar>
</ion-header>
<ion-content>
  Choisir un lieu
</ion-content>

import { Component } from '@angular/core';
import { Platform, NavParams, ViewController } from 'ionic-angular';

@Component({
  selector: 'modal-new-location',
  templateUrl: 'new-location-modal.html'
})
export class NewLocationModal {

  constructor(public platform: Platform, public viewCtrl: ViewController) {
    console.log('NewLocationModal#constructor');
  }

  dismiss() {
    this.viewCtrl.dismiss();
  }
}

EXCEPTION: Error in ./NewLocationModal class NewLocationModal - inline template:22:14 caused by: Cannot read property 'items' of undefined

TypeError: Cannot read property 'items' of undefined
    at CompiledTemplate.proxyViewClass.View_NewLocationModal0.detectChangesInternal (/AppModule/NewLocationModal/component.ngfactory.js:363:46)
    at CompiledTemplate.proxyViewClass.AppView.detectChanges (http://localhost:8100/build/main.js:117531:14)
    at CompiledTemplate.proxyViewClass.DebugAppView.detectChanges (http://localhost:8100/build/main.js:117726:44)
    at CompiledTemplate.proxyViewClass.AppView.internalDetectChanges (http://localhost:8100/build/main.js:117516:18)
    at CompiledTemplate.proxyViewClass.View_NewLocationModal_Host0.detectChangesInternal (/AppModule/NewLocationModal/host.ngfactory.js:29:19)
    at CompiledTemplate.proxyViewClass.AppView.detectChanges (http://localhost:8100/build/main.js:117531:14)
    at CompiledTemplate.proxyViewClass.DebugAppView.detectChanges (http://localhost:8100/build/main.js:117726:44)
    at ViewContainer.detectChangesInNestedViews (http://localhost:8100/build/main.js:117863:37)
    at CompiledTemplate.proxyViewClass.View_ModalCmp0.detectChangesInternal (/IonicModule/ModalCmp/component.ngfactory.js:46:14)
    at CompiledTemplate.proxyViewClass.AppView.detectChanges (http://localhost:8100/build/main.js:117531:14)
    at CompiledTemplate.proxyViewClass.DebugAppView.detectChanges (http://localhost:8100/build/main.js:117726:44)
    at CompiledTemplate.proxyViewClass.AppView.internalDetectChanges (http://localhost:8100/build/main.js:117516:18)
    at CompiledTemplate.proxyViewClass.View_ModalCmp_Host0.detectChangesInternal (/IonicModule/ModalCmp/host.ngfactory.js:30:19)
    at CompiledTemplate.proxyViewClass.AppView.detectChanges (http://localhost:8100/build/main.js:117531:14)
    at CompiledTemplate.proxyViewClass.DebugAppView.detectChanges (http://localhost:8100/build/main.js:117726:44)