Angular 使用自定义路由处理ionic2应用程序中的后退按钮事件时出现问题
我已经按照建议在我的ionic 2应用程序中实现了后退按钮代码。但它并没有像预期的那样发挥作用 然而,我在点击后退按钮时得到console.log() 下面是我的代码供参考 1) app.routes.tsAngular 使用自定义路由处理ionic2应用程序中的后退按钮事件时出现问题,angular,typescript,ionic2,angular2-routing,angular2-router,Angular,Typescript,Ionic2,Angular2 Routing,Angular2 Router,我已经按照建议在我的ionic 2应用程序中实现了后退按钮代码。但它并没有像预期的那样发挥作用 然而,我在点击后退按钮时得到console.log() 下面是我的代码供参考 1) app.routes.ts import { NgModule } from '@angular/core'; import { RouterModule, Routes } from '@angular/router'; import { Login } from '../pages/Login/Login'; i
import { NgModule } from '@angular/core';
import { RouterModule, Routes } from '@angular/router';
import { Login } from '../pages/Login/Login';
import { Orders } from '../pages/Orders/Orders';
import { OrderDetails } from '../pages/Orders/OrderDetails';
import { AssignOrder } from '../pages/Orders/AssignOrder';
const routes: Routes = [
{
path: '', redirectTo: '/Orders',
pathMatch: 'full'
},
{
path: 'Login',
component: Login
},
{
path: 'Orders',
component: Orders
},
{
path: 'OrderDetails/:orderid',
component: OrderDetails
},
{
path: 'AssignOrder',
component: AssignOrder
}
];
@NgModule({
imports: [
RouterModule.forRoot(routes)
],
exports: [
RouterModule
]
})
export class AppRoutingModule { }
export const routedComponents = [Login, Orders, OrderDetails, AssignOrder];
2) app.component.ts
import { Component } from '@angular/core';
import { App, Platform, ViewController } from 'ionic-angular';
import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';
@Component({
templateUrl: 'app.html'
})
export class MyApp {
constructor(app: App, platform: Platform, statusBar: StatusBar, splashScreen: SplashScreen) {
platform.ready().then(() => {
// Okay, so the platform is ready and our plugins are available.
// Here you can do any higher level native things you might need.
statusBar.styleDefault();
if (splashScreen) {
setTimeout(() => {
splashScreen.hide();
}, 100);
}
});
platform.registerBackButtonAction(() => {
let nav = app.getActiveNav();
console.log(nav);
let activeView = nav.getActive();
if (activeView != null) {
console.log('activeView:' + activeView);
if (nav.canGoBack()) {
nav.pop();
} else if (typeof activeView.instance.backButtonAction === 'function')
activeView.instance.backButtonAction();
else nav.parent.select(0); // goes to the first tab
}
else {
console.log('activeView is null');
}
});
}
}
3) 订单
在Orders页面中,若我单击back按钮,它将调用app.component.ts中的函数,在该函数中,我将在let activeView=nav.getActive()中获得未定义的“activeView”代码>行。所以,在控制台中打印“activeView为空”(如第一个解决方案中所述)。请看图片
4) OrderDetails.ts
在OrderDetails页面中,若我单击“上一步”按钮,它将调用OrderDetails.ts中的函数,因为我正在重写app.component.ts的方法
this.platform.registerBackButtonAction(this.backButtonAction,10)代码>(如第二个解决方案中所述)。我在控制台日志中也得到了“backButtonAction called”。但是它在this.gotoOrders()中给了我错误代码>行。在“this”中找不到gotoOrders()函数。在调试窗口中,我已展开“this”,但在那里看不到gotoOrders()函数。请看图片
从'@angular/core'导入{Component,OnInit,Input,Output,EventEmitter};
从'@angular/Router'导入{Router,ActivatedRoute,Params};
从“离子角度”导入{Platform,AlertController,LoadingController};
从“../../models/User”导入{User};
从“../../models/Order”导入{Order};
从“../../providers/UserService”导入{UserService};
从“../../providers/OrderService”导入{OrderService};
@组成部分({
选择器:“页面医嘱详细信息”,
templateUrl:'OrderDetails.html'
})
导出类OrderDetails实现OnInit{
模态:任何;
@输入()顺序:顺序;
@Output()close=neweventemitter();
用户:用户;
装载:任何;
isStaff=this.userService.user.Role==“STAFF”;
navigated=false;//如果在此处导航,则为true
构造函数(公共路由器:路由器、,
专用路由:激活的路由,
公共用户服务:用户服务,
公共平台:平台,
公共orderService:orderService,
公共警报Ctrl:AlertController,
公共加载(Ctrl:LoadingController){
this.platform.registerBackButtonAction(this.backButtonAction,10);
}
恩戈尼尼特(){
if(this.userService.user==null){
this.userService.logout();
}
否则{
this.route.params.forEach((params:params)=>{
if(参数['orderid']!==未定义){
设orderid=params['orderid'];
this.navigated=true;
}
});
}
}
backButtonAction(){
log('backButtonAction called');
this.gotoOrders();
//if(this.modal&&this.modal.index==0){
//this.modal.discouse();
//}其他{
///*退出应用程序,因为这是主/第一个选项卡*/
//this.platform.exitApp();
////this.navCtrl.setRoot(另一页);Ionic 2不使用角度路由器..但路由器工作正常。唯一的问题是检测路由并在“后退”按钮按下事件中发挥作用。从未尝试过..但是如果您使用路由器,则可能连“后退”按钮都应该使用路由器而不是链接帖子所建议的导航…也许您应该查找angular2 solthis.navCtrl.setRoot(另一页)
是导航控制器而不是路由器。我已经在使用Angular2。Ionic 2不使用角度路由器。但路由器工作正常。唯一的问题是在按下后退按钮事件期间检测路由和功能。从未尝试过。但是,如果您使用路由器,那么可能连back按钮也应该使用路由器而不是链接帖子所建议的导航。…也许你应该找angular2 sol这个。navCtrl.setRoot(另一页)
是导航控制器而不是路由器。我已经在使用angular2了。
import { Component, OnInit } from '@angular/core';
import { Router } from '@angular/router';
import { Platform, AlertController, LoadingController } from 'ionic-angular';
import { User } from '../../models/User';
import { Order } from '../../models/Order';
import { UserService } from '../../providers/UserService';
import { OrderService } from '../../providers/OrderService';
@Component({
selector: 'page-Orders',
templateUrl: 'Orders.html'
// providers: [UserService, OrderService],
})
export class Orders implements OnInit {
orders: Order[];
selectedOrder: Order;
user: User;
error: any;
showFilter: boolean;
Search: any;
loading: any;
constructor(public router: Router,
public userService: UserService,
public orderService: OrderService,
public platform: Platform,
public alertCtrl: AlertController,
public loadingCtrl: LoadingController) {
this.showFilter = false;
this.Search = '';
}
ngOnInit() {
if (localStorage.getItem('User') == null) {
this.router.navigate(['/Login']);
}
else {
this.userService.user = JSON.parse(localStorage.getItem('User'));
this.getOrders();
}
}
backButtonAction() {
}
}
import { Component, OnInit, Input, Output, EventEmitter } from '@angular/core';
import { Router, ActivatedRoute, Params } from '@angular/router';
import { Platform, AlertController, LoadingController } from 'ionic-angular';
import { User } from '../../models/User';
import { Order } from '../../models/Order';
import { UserService } from '../../providers/UserService';
import { OrderService } from '../../providers/OrderService';
@Component({
selector: 'page-OrderDetails',
templateUrl: 'OrderDetails.html'
})
export class OrderDetails implements OnInit {
modal: any;
@Input() order: Order;
@Output() close = new EventEmitter();
user: User;
loading: any;
isStaff = this.userService.user.Role == "STAFF";
navigated = false; // true if navigated here
constructor(public router: Router,
private route: ActivatedRoute,
public userService: UserService,
public platform: Platform,
public orderService: OrderService,
public alertCtrl: AlertController,
public loadingCtrl: LoadingController) {
this.platform.registerBackButtonAction(this.backButtonAction, 10);
}
ngOnInit() {
if (this.userService.user == null) {
this.userService.logout();
}
else {
this.route.params.forEach((params: Params) => {
if (params['orderid'] !== undefined) {
let orderid = params['orderid'];
this.navigated = true;
}
});
}
}
backButtonAction() {
console.log('backButtonAction called');
this.gotoOrders();
// if (this.modal && this.modal.index === 0) {
// this.modal.dismiss();
// } else {
// /* exits the app, since this is the main/first tab */
// this.platform.exitApp();
// // this.navCtrl.setRoot(AnotherPage); <-- if you wanted to go to another page
// }
}
gotoOrders(): void {
this.router.navigate(['/Orders']);
}
}