我正在尝试使用Ionic框架制作Android应用程序。我实现了一个侧面菜单,当我尝试从侧面菜单中按网页,我在控制台中的错误说:Ionic Framework - 'nav'undefined尝试推送页面时
无法读取未定义
app.ts的特性“推”
import { Component, ViewChild } from '@angular/core';
import { ModalController, ionicBootstrap, Platform, MenuController, NavController } from 'ionic-angular';
import { StatusBar } from 'ionic-native';
import { HomePage } from './pages/home/home';
import {AppSettingsPage} from "./pages/app-settings/app-settings";
import {TabsPage} from "./pages/tabs/tabs";
import {ReserveRoomPage} from "./pages/reserve-room/reserve-room";
import {ConfirmedReservationsPage} from "./pages/confirmed-reservations/confirmed-reservations";
@Component({
templateUrl: 'build/app.html',
providers: [NavController]
})
export class MyApp {
@ViewChild('nav') nav: NavController;
private rootPage: any;
private pages: any[];
private icon = 'cog';
constructor(private platform: Platform, private menu: MenuController,
private modalCtrl: ModalController) {
this.menu = menu;
this.pages = [
{title: 'Home', component: HomePage, icon: 'home'},
{title: 'Settings', component: AppSettingsPage, icon: 'settings'},
{title: 'Reserve Room', component: ReserveRoomPage, icon: 'add'},
{title: 'My Reservations', component: ConfirmedReservationsPage, icon: 'book'},
];
this.rootPage = TabsPage;
platform.ready().then(() => {
StatusBar.styleDefault();
});
}
openPage(page){
this.menu.close();
this.nav.push(page.component);
}
}
ionicBootstrap(MyApp);
app.html
<ion-menu [content] = "content">
<ion-toolbar>
<ion-title><strong>Giman</strong>.lk</ion-title>
</ion-toolbar>
<ion-content>
<ion-list>
<button ion-item *ngFor="let p of pages" (click)="openPage(p)">
<ion-icon name="{{ p.icon }}"></ion-icon> {{ p.title }}
</button>
</ion-list>
</ion-content>
</ion-menu>
<ion-nav id="nav" [root]="rootPage" #content swipe-back-enabled="false"></ion-nav>
APP-settings.ts(示例页面我要推的)
import { Component } from '@angular/core';
import { ViewController, NavController } from 'ionic-angular';
@Component({
templateUrl: 'build/pages/app-settings/app-settings.html',
})
export class AppSettingsPage {
constructor(private navCtrl: NavController, private view: ViewController) {
}
goBack(){
this.view.dismiss();
}
}
(我进口ModalController因为我想预览我的应用程序的用户界面流动,因为推不工作,我用每个页面作为模板仅用于预览目的。对于最终的应用程序,我需要推和弹出)
修复它!非常感谢。任何你将它设置为“Nav”而不是“NavController”的原因? – user9492428
@ user9492428 tbh我不确定,甚至[离子文档](http://ionicframework.com/docs/v2/api/components/nav/NavController/#navigating-from-the-root-component)都会说使用NavController,尽管当使用'ionic generate myapp'时,他们会为您提供'Nav'。也许他们会更新这个 – Ivaro18