如何在侧边显示子菜单以循环显示在Ionic中的菜单

问题描述 投票:1回答:1

我正在Ionic App中工作,我想在侧边栏中显示子菜单。我正在使用*ngFor获取菜单,但问题是我无法显示该子菜单。

这是我的app.html

<ion-menu [content]="content" side="left" type="overlay">
    <ion-content class="mymenu22">
     <ion-grid class="formenu11">
      <h1 class="mymenuh11">OTHERS</h1>
     </ion-grid>
     <ion-list>
      <button menuClose ion-item *ngFor="let p1 of pages1" (click)="openPage(p1)" class="menu2">
        <ion-icon name="{{p1.name1}}"></ion-icon> {{p1.title1}}
      </button>
     </ion-list>
    </ion-content>
</ion-menu>

在此,我将在侧栏中显示菜单,并且希望显示第一个菜单的子菜单。

这是我的app.component.ts

pages1: Array<{title1: string, component: any, name1: string}>;
this.pages1 = [
  { title1: 'Manage Account', component: ManageaccountPage, name1: 'settings' },
  { title1: 'About Us', component: AboutPage, name1: 'people' },
  { title1: 'Gallery', component: GalleryPage, name1: 'images' },
  { title1: 'Contact Us', component: ContactPage, name1: 'contacts' },
];

对于“管理帐户”,我想显示子菜单。

enter image description here

对于“管理帐户,我想显示子菜单,但是我没有得到任何代码。

非常感谢您的帮助。

angular ionic-framework ionic3
1个回答
1
投票

您可以将子菜单页面保留在页面对象内的另一个数组中,以使用*ngFor填充要查看的子菜单页面。

用所需属性定义页面object

pages1: Array<{title1: string, component: any, name1: string, showDetails: boolean, icon: string, subPages: any[]}>;

将页面添加到页面constructor内的页面1数组中。不要忘记定义应用程序的rootPage

    this.pages1 = [
  { title1: 'Manage Account', component: ManageaccountPage, name1: 'settings', showDetails: false, icon: 'ios-arrow-down', subPages: null },
  { title1: 'About Us', component: AboutPage, name1: 'people', showDetails: false, icon: 'ios-arrow-down', subPages: null },
  { title1: 'Galler', component: GalleryPage, name1: 'images', showDetails: false, icon: 'ios-arrow-down', subPages: null },
  { title1: 'Contact Us', component: '', name1: 'contacts', showDetails: false, icon: 'ios-arrow-down',
          subPages: [
            { title1: 'Contact1', component: Contact1Page, name1: 'contact1' },
            { title1: 'Contact2', component: Contact2Page, name1: 'contact2'  },
            { title1: 'Contact3', component: Contact3Page, name1: 'contact3'  },
        ]
   },
];

定义从侧面菜单打开单击页面的功能。

  openPage(p1) {
    this.rootPage = p1.component;
  }

在侧面菜单中定义一个用于折叠/展开子菜单项的功能。

  toggleDetails(p) {
    if (p.showDetails) {
        p.showDetails = false;
        p.icon = 'ios-arrow-down';
    } else {
        p.showDetails = true;
        p.icon = 'ios-arrow-up';

    }
}

您的侧面菜单html应该如下。

<ion-menu [content]="content" side="left" type="overlay">
    <ion-content>
     <ion-grid>
      <h1>OTHERS</h1>
     </ion-grid>
     <ion-list>
      <ion-item ion-item *ngFor="let p1 of pages1" (click)="toggleDetails(p1)" [ngStyle]="{'background': (p1.subPages != null) ? '#dcd5d5': null}">
        <ion-icon name="{{p1.name1}}"></ion-icon>
         <span *ngIf="p1.component === ''">{{p1.title1}}</span>
         <span *ngIf="p1.component !== ''" menuClose (click)="openPage(p1)">{{p1.title1}}</span>
         <ion-icon float-right *ngIf="p1.subPages != null" [name]="p1.icon" item-end></ion-icon>
        <div *ngIf="p1.showDetails &&p1.subPages != null">
          <ion-list>
            <ion-item style="border-bottom: 1px solid #1f1c1c;background: #dcd5d5" ion-item *ngFor="let subP of p1.subPages">
              <span (click)="openPage(subP)"  menuClose>{{subP.title1}}</span>
            </ion-item>
          </ion-list>
        </div>
      </ion-item>
     </ion-list>
    </ion-content>
</ion-menu>

我认为这将对您有所帮助。查找StackBlitz Demo Here

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