Question

我正在使用visual studio 2015在Angular2中构建应用程序：主页面中有两个按钮，它们都提供相同的弹出窗口。一切顺利，直到我决定为这个模态制作一个单独的组件。因此按钮仍保留在主页面中，而模态现在位于另一个组件中。但现在我得到了错误：无法读取未定义的属性'show'！在我的节目功能。这是modal.component.ts：

import { Component, OnInit, ViewChild } from '@angular/core';
import { ModalDirective } from 'ngx-bootstrap/modal';

@Component({
  selector: 'app-info-modal',
  templateUrl: './info-modal.component.html',
  styleUrls: ['./info-modal.component.scss']
})
export class InfoModalComponent implements OnInit {

  @ViewChild('lgModal') public lgModal:ModalDirective;

  constructor() { }

  ngOnInit() {
  }
  showInfoModal = () => {
    this.lgModal.show();
  };
}

这是modal.component.html：

<div bsModal #lgModal="bs-modal" [config]="{backdrop: 'static'}" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel"
  aria-hidden="true">
  <div class="modal-dialog modal-lg">
    <div class="modal-content">
      <div class="modal-header">
        <h2 class="modal-title pull-left">what is it about?</h2>
        <button type="button" class="close pull-right" (click)="lgModal.hide()" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        <p>content of the window.....</p>
      </div>
     </div>
   </div>
 </div>

主页面组件html中的按钮：

<button class="btn-default btn pull-right next" (click)="showModal()"> privacy <i class="fa fa-fw fa-chevron-right"></i></button>

主页component.ts：

import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.scss']
})
export class HomeComponent implements OnInit {

  constructor(){

  }

  ngOnInit() {
    }

  showModal() {
    this.infoModal.showInfoModal();
  }

有人有任何想法吗？我不知道我哪弄错了！

Answer 1

您应该使用以下内容作为ViewChild参考

@ViewChild(ModalDirective) public lgModal:ModalDirective;

更新1：根据修订后的问题

您错过了infoModal推荐，如下所示

export class HomeComponent implements OnInit {
@ViewChild(InfoModalComponent)  infoModal : InfoModalComponent; ////// missing declaration

  ngOnInit() {
    }

  showModal() {
    this.infoModal.showInfoModal();
  }

注意：当您使用this.infoModal时，您需要按上述方式声明它，否则您可以在HTML中使用它们

<button class="btn-default btn pull-right next" (click)="infoModal.showInfoModal()">
Show Information
</button>

<app-info-modal #infoModal> </app-info-modal>

使用ngx-bootstrap的模态给出了错误：无法读取未定义

1 个答案: