问只禁止滑动打开离子菜单，而不是滑动关闭离子2。

EN

<ion-menu persistent="true" [content]="content" 
(ionOpen)="enableSwipe()"     <!-- Enable it when opening  -->
(ionClose)="disableSwipe()">  <!-- Disable it when closing -->
    <ion-header>
        <ion-toolbar color="primary">
            <ion-title>Side menu</ion-title>
        </ion-toolbar>
    </ion-header>    
    <ion-content>
    </ion-content>
</ion-menu>

<!-- Disable swipe-to-go-back because it's poor UX to combine STGB with side menus -->
<ion-nav [root]="rootPage" #content swipeBackEnabled="false"></ion-nav>

import { Component, ViewEncapsulation } from '@angular/core';
import { MenuController } from 'ionic-angular';
import { HomePage } from '../pages/home/home';

@Component({
    templateUrl: 'app.html'
})
export class MyApp {
    public rootPage: any = HomePage;

    constructor(private menuCtrl: MenuController) {}

    ngAfterViewInit() {
      this.disableSwipe();
    }

    public enableSwipe(): void {
      this.menuCtrl.swipeEnable(true);
    }

    public disableSwipe(): void {
      this.menuCtrl.swipeEnable(false);
    }

  }