我想在ionic2中创建侧边菜单。但是,我不知道如何在菜单中显示和隐藏选项。 我想在登录前和登录后在菜单中显示一些选项。
Before login After login
--------- ---------
Home Home
Login Myprofile
Logout
app.ts
pages: Array<{title: string, component: any}>;
pagess: Array<{title: string, component: any}>;
this.pages= [
{ title: 'Home', component: HomePage},
{ title: 'Login', component: LoginPage}
];
this.pagess = [
{ title: 'Home', component: HomePage},
{ title: 'Myprofile', component: MyprofilePage},
{ title: 'Logout', component: HomePage}
];
enableMenu(loggedIn: boolean) {
this.menu.enable(loggedIn, 'loggedInMenu');
this.menu.enable(!loggedIn, 'loggedOutMenu');
}
我不知道如何设置enableMenu
app.html
<ion-menu id="loggedOutMenu" [content]="content">
<ion-header>
<ion-toolbar>
<ion-title>Menu</ion-title>
</ion-toolbar>
</ion-header>
<ion-content>
<ion-list>
<button menuClose ion-item *ngFor="let p of pages" (click)="openPage(p)">
{{p.title}}
</button>
</ion-list>
</ion-content>
</ion-menu>
<ion-menu id="loggedInMenu" [content]="content">
<ion-header>
<ion-toolbar>
<ion-title>Menu</ion-title>
</ion-toolbar>
</ion-header>
<ion-content>
<ion-list>
<button menuClose ion-item *ngFor="let p of pagess " (click)="openPage(p)">
{{p.title}}
</button>
</ion-list>
</ion-content>
</ion-menu>
<ion-nav [root]="rootPage" #content swipeBackEnabled="false"></ion-nav>
login.ts(登录是myphpfile中的检查)
login() {
this.api.getLogin(this.username, this.password).subscribe(
data => {
let loader = this.loadingCtrl.create({
content: "Please wait...",
duration: 1000
});
loader.present();
this.navCtrl.setRoot(HomePage);
},
err => {
let alert = this.alertCtrl.create({
title: 'Warning!',
subTitle: 'incorrect!',
buttons: ['OK']
});
alert.present();
}
);
}
答案 0 :(得分:3)
您可以通过订阅/收听loggedIn
事件来完成此操作。现在,这与您的正常登录不同。您需要检查您是否已登录。
您的app.html代码将保持如下:
<ion-menu [content]="content">
<ion-header>
<ion-toolbar>
<ion-title>Menu</ion-title>
</ion-toolbar>
</ion-header>
<ion-content>
<ion-list>
<button menuClose ion-item *ngFor="let p of pages" (click)="openPage(p)" *ngIf='p.isVisible'>
{{p.title}}
</button>
</ion-list>
</ion-content>
</ion-menu>
现在这是app.ts
的主要变化。
pages: Array<{title: string, component: any, isVisible: boolean}>;
constructor(){
this.api.isLoggedIn().subscribe(loggedIn => {
this.pages= [
{ title: 'Home', component: HomePage, isVisible: true},
{ title: 'Login', component: LoginPage, isVisible: !loggedIn},
{ title: 'Myprofile', component: MyprofilePage, isVisible: loggedIn},
{ title: 'Logout', component: LogoutPage, isVisible: loggedIn}
];
});
}
现在,您的isLoggedIn()
是一个方法,当登录状态发生变化时,它返回一个Observable。它的数据是boolean
。您可能已经在您的API中使用了firebase,或者您需要维护/写入它。让我知道你在使用什么,我会更新我的答案。