typescript - 如何通过 Ionic 4 选项卡按钮传递参数

Question

如何通过 Ionic 4 选项卡按钮传递参数

    <ion-tabs>
    <ion-tab-bar slot="top" color="light">
      <ion-tab-button tab="tab1">
        <ion-label> Tab 1 </ion-label>
      </ion-tab-button>
      <ion-tab-button tab="tab2">
        <ion-label> Tab 2 </ion-label>
      </ion-tab-button>
    </ion-tab-bar>
  </ion-tabs>

在我的 tabsmain.module.ts 中，我将其中的每一个路由为

    const routes: Routes = [
  {
    path: '',
    component: TabsmainPage, children: [
      { path: '', loadChildren: './pages/tab1/tab1.module#Tab1PageModule' },
      { path: 'tab1/:id2', loadChildren: './pages/tab1/tab1.module#Tab1PageModule' },
      { path: 'tab2', loadChildren: './pages/tab2/tab2.module#Tab2PageModule' }},
    ]
  }
];

我想通过 NavParams 传递一些 ID 作为参数
请帮助我，我如何通过 传递参数 ionic 标签按钮

Answer 1

请在下面找到构建这样的东西的步骤:



首先我创建了一个全新的tabs应用程序使用 ionic start命令，然后更新 tabs.router.module.ts文件以允许 tab2收到 id作为参数:

import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { TabsPage } from './tabs.page';

const routes: Routes = [
  {
    path: 'tabs',
    component: TabsPage,
    children: [
      {
        path: 'tab1',
        children: [
          {
            path: '',
            loadChildren: '../tab1/tab1.module#Tab1PageModule'
          }
        ]
      },
    {
        path: 'tab2',
        children: [
          {
            path: '',
            loadChildren: '../tab2/tab2.module#Tab2PageModule'
          }
        ]
      },
      // ---------------- START: Added by me  ----------------
      {
        path: 'tab2/:id',
        children: [
          {
            path: '',
            loadChildren: '../tab2/tab2.module#Tab2PageModule'
          }
        ]
      },
      // ---------------- END: Added by me  ----------------
      {
        path: 'tab3',
        children: [
          {
            path: '',
            loadChildren: '../tab3/tab3.module#Tab3PageModule'
          }
        ]
      },
      {
        path: '',
        redirectTo: '/tabs/tab1',
        pathMatch: 'full'
      }
    ]
  },
  {
    path: '',
    redirectTo: '/tabs/tab1',
    pathMatch: 'full'
  }
];

@NgModule({
  imports: [
    RouterModule.forChild(routes)
  ],
  exports: [RouterModule]
})
export class TabsPageRoutingModule {}

完成后，我更新了 tabs1页面是这样的:

组件

import { Component } from "@angular/core";
import { Router } from "@angular/router";

@Component({
  selector: "app-tab1",
  templateUrl: "tab1.page.html",
  styleUrls: ["tab1.page.scss"]
})
export class Tab1Page {
  public items: Array<{ id: number; name: string }> = [
    {
      id: 1,
      name: "Item 1"
    },
    {
      id: 2,
      name: "Item 2"
    },
    {
      id: 3,
      name: "Item 3"
    },
    {
      id: 4,
      name: "Item 4"
    },
    {
      id: 5,
      name: "Item 5"
    }
  ];

  constructor(private router: Router) {}

  public onOpenItem(item: any) {
    this.router.navigate([`tabs/tab2/${item.id}`]);
  }
}

HTML

<ion-header>
  <ion-toolbar>
    <ion-title>
      Tab One
    </ion-title>
  </ion-toolbar>
</ion-header>
<ion-content>
  <ion-list>
    <ion-item *ngFor="let item of items" (click)="onOpenItem(item)" detail=”true”>
      <ion-label>{{item.name}}</ion-label>
    </ion-item>
  </ion-list>
</ion-content>

正如你在那里看到的，唯一重要的是当用户点击一个项目时，onOpenItem(...)由于这一行，方法将更改选定的选项卡:

this.router.navigate([`tabs/tab2/${item.id}`]);

然后剩下要做的最后一件事就是更新 tabs2页面获取id来自 url 的参数，如下所示:

组件

import { Component } from "@angular/core";
import { ActivatedRoute } from "@angular/router";

@Component({
  selector: "app-tab2",
  templateUrl: "tab2.page.html",
  styleUrls: ["tab2.page.scss"]
})
export class Tab2Page {

  public id: number;

  constructor(public route: ActivatedRoute) {
    this.id = this.route.snapshot.params.id;
  }
}

HTML

<ion-header>
  <ion-toolbar>
    <ion-title>
      Tab Two
    </ion-title>
  </ion-toolbar>
</ion-header>

<ion-content>
  <h2>The selected id is: {{ id }}</h2>
</ion-content>