我有一个多页面的Ionic 3项目。 有导航步骤:
在模态中,有一个确认按钮。我希望这个按钮返回ItemList。在项目列表上返回后,后退按钮应该将用户返回到主页。
但是,我有同样的错误(Ionic 2 Angular NavController, pop back to second last page)
我尝试了高投票答案提出的解决方案,但失败了。
<ion-header>
<ion-navbar>
<ion-title>Home</ion-title>
</ion-navbar>
</ion-header>
<ion-content padding>
<button ion-button type="submit" (click)="goToList()">Go to list</button>
</ion-content>
import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { ItemlistPage } from '../itemlist/itemlist';
@Component({
selector: 'page-home',
templateUrl: 'home.html'
})
export class HomePage {
constructor(public navCtrl: NavController) {}
goToList() {
this.navCtrl.push(ItemlistPage);
}
}
<ion-header>
<ion-navbar>
<ion-title>itemlist</ion-title>
</ion-navbar>
</ion-header>
<ion-content padding>
<ion-list>
<button ion-item (click)="goToItem()">Item 1</button>
<button ion-item (click)="goToItem()">Item 2</button>
</ion-list>
</ion-content>
import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { ItemPage } from '../item/item';
@IonicPage()
@Component({
selector: 'page-itemlist',
templateUrl: 'itemlist.html',
})
export class ItemlistPage {
constructor(public navCtrl: NavController, public navParams: NavParams) {}
goToItem() {
this.navCtrl.push(ItemPage);
}
}
<ion-header>
<ion-navbar>
<ion-title>item</ion-title>
</ion-navbar>
</ion-header>
<ion-content padding>
<button ion-button type="submit" (click)="openModal()">Open modal</button>
</ion-content>
import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams, ModalController } from 'ionic-angular';
import { ItemmodalPage } from '../itemmodal/itemmodal';
@IonicPage()
@Component({
selector: 'page-item',
templateUrl: 'item.html',
})
export class ItemPage {
constructor(public navCtrl: NavController, public navParams: NavParams, public modalController: ModalController) {
}
openModal() {
let myModal = this.modalController.create(ItemmodalPage);
myModal.present();
}
}
<ion-header>
<ion-navbar>
<ion-title>itemmodal</ion-title>
</ion-navbar>
</ion-header>
<ion-content padding>
<button ion-item (click)="returnToList()">Return to list</button>
</ion-content>
import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { ItemlistPage } from '../itemlist/itemlist';
@IonicPage()
@Component({
selector: 'page-itemmodal',
templateUrl: 'itemmodal.html',
})
export class ItemmodalPage {
constructor(public navCtrl: NavController, public navParams: NavParams) {
}
returnToList() {
this.navCtrl.push(ItemlistPage).then(() => {
for (var i = 0; i < this.navCtrl.length(); i++) {
console.log('Stack history Before: '+i);
console.log(this.navCtrl.getByIndex(i).component);
}
this.navCtrl.remove(1, 3);
this.navCtrl.pop();
// Debug lines
for (var i = 0; i < this.navCtrl.length(); i++) {
console.log('Stack history After : '+i);
console.log(this.navCtrl.getByIndex(i).component);
}
});
}
}
当我点击模态按钮时,我想要调试console.log()行显示:
Stack history Before: 0
function ItemListPage()
Stack history Before: 1
function ModalCmp()
Stack history Before: 2
function ItemPage()
Stack history Before: 3
function ItemListPage()
Stack history Before: 4
function HomePage()
Stack history Before: 0
function ItemListPage()
Stack history Before: 1
function HomePage()
但我得到了这个:
Stack history Before: 0
function ModalCmp()
Stack history Before: 1
function ItemlistPage()
Stack history After : 0
function ModalCmp()
Stack history After : 1
function ItemlistPage()
我不明白为什么我只使用ModalCmp和ItemListPage而不是HomePage和ItemPage。
你知道如何干净地回到ItemList吗?
答案 0 :(得分:0)
最后我找到了解决方案。
事实上,模态组件有自己的历史,因此无法修改模态组件的主要历史记录。我们应该解雇要在先前视图中返回的模式并访问主历史记录以执行 navCtrl.pop()。
最后,Ionic Modals无法访问主要观看历史记录。
import { Component } from '@angular/core';
import { IonicPage, NavController, ViewController } from 'ionic-angular';
import { ItemlistPage } from '../itemlist/itemlist';
@IonicPage()
@Component({
selector: 'page-itemmodal',
templateUrl: 'itemmodal.html',
})
export class ItemmodalPage {
constructor(public navCtrl: NavController, public viewCtrl: ViewController) {
}
returnToList() {
this.viewCtrl.dismiss({'action' :'remove'});
}
}
import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams, ModalController } from 'ionic-angular';
import { ItemmodalPage } from '../itemmodal/itemmodal';
@IonicPage()
@Component({
selector: 'page-item',
templateUrl: 'item.html',
})
export class ItemPage {
constructor(public navCtrl: NavController, public navParams: NavParams, public modalController: ModalController) {
}
openModal() {
let myModal = this.modalController.create(ItemmodalPage);
myModal.onDidDismiss(data => {
if (data.action == 'remove') {
this.navCtrl.pop();
}
});
myModal.present();
}
}