导航控制器在离子4中不工作

现在,完成最后一步并在我们的 app-routing.module.ts程序 文件,它们看起来像这样:

const routes: Routes = [
{ path: '', redirectTo: '/home', pathMatch: 'full' },
{ path: 'home', loadChildren: './pages/home/home.module#HomeModule' },
{ path: 'products', loadChildren: './pages/products/products.module#ProductsModule'},
{ path: 'products/:id', loadChildren: './pages/product-detail/product-detail.module#ProductDetailModule' },
{ path: 'products/categories', loadChildren: './pages/product-categories/product-categories.
{ path: 'support', loadChildren: './pages/support/support.module#SupportModule' }
];

html页面中的setRoot

<ion-button href="/support" routerDirection="root">

this.navCtrl.navigateRoot('/support');

推动

<ion-button href="/products/12" routerDirection="forward">

或

this.navCtrl.navigateForward('/products/12');

<ion-button href="/products" routerDirection="backward">

或

<ion-back-button defaultHref="/products"></ion-back-button>

您还可以通过编程向后导航:

this.navCtrl.navigateBack('/products');

https://www.joshmorony.com/converting-ionic-3-push-pop-navigation-to-angular-routing-in-ionic-4/

导航控制器,因为这是不赞成在离子4。

结构是这样的。

     V3                 V4
/src/pages     ->   /src/app/pages
/src/models    ->   /src/app/models
/src/providers ->   /src/app/providers

• 如果要传递参数,可以使用参数。

  this.router.navigate('/pages,{locs:this.locId}]);

this.router.navigate(['/list'], { locs: this.locId }]);

示例:没有页面目录和参数。

this.router.navigate(['/list']);

此链接对选项卡很有用。 有关更多信息,请访问此链接。 https://medium.com/modus-create-front-end-development/upgrading-an-ionic-3-application-to-ionic-4-eaf81a53cdea][1]

附加条款:

this.route.snapshot.paramMap.get('locs') 通过导入 private route: ActivatedRoute 在当前页构造函数中

export class ListPage implements OnInit {

  constructor(private route: ActivatedRoute) {
    console.log("this.route.snapshot.paramMap.get : ", this.route.snapshot.paramMap.get('locs'));
  }

  ngOnInit() {
  }

}

import { Component } from '@angular/core';
import { Router } from '@angular/router';

@Component({
 ...
})
export class LoginComponent {
 constructor(private router: Router){}

    navigate(){
       this.router.navigate(['/detail'])
    }
}

for more info click here

首次导入导航控制器 从'@ionic/angular'导入{NavController,AlertController}; 此.nav.navigateForward('/ChatPage') ionic 4支持,但我建议应该使用角路由

试一下 离子4 )

import { NavController } from '@ionic/angular';

代替 )

import { NavController } from 'ionic-angular'

this.navCtrl.push(list);

this.navCtrl.goForward('/list');

用于导航栏中的后退按钮

粘贴下列代码 <ion-toolbar> </ion-toolbar> 第二页的后退按钮。

<ion-buttons slot="start">
      <ion-back-button  defaultHref="home"></ion-back-button>
    </ion-buttons>

离子4-角度(离子启动应用程序名称--类型=角度)

物理后退按钮 和

在目标页(第二页)中,执行以下操作:

第二页TS

    import { Component, OnInit } from '@angular/core';
    import { Router } from '@angular/router';
    import { Subscription } from 'rxjs';
    import { Platform } from '@ionic/angular';

    @Component({
      selector: 'app-second',
      templateUrl: './second.page.html',
      styleUrls: ['./second.page.scss'],
    })
    export class SecondPage implements OnInit, OnDestroy {

        inscBackAction: Subscription;
        element: HTMLElement;

        constructor(
          private router: Router, 
          public platform: Platform) {
        }

        ngOnInit() {    
          this.inscBackAction = this.platform.backButton.subscribe(() => {
            // Check this log in chrome: "chrome://inspect/#devices"
            console.log('Physical Back Button');                

            this.element = document.getElementById('backButton') as HTMLElement;
            this.element.click();
            // OR
            // this.router.navigate(['/anyPage']);

          }, error => {
            console.log('\n\nERROR:\n' + error.message + '\n\n');
          });
        }

        ngOnDestroy() {
          this.inscBackButton.unsubscribe();
        }
    }

<ion-header>
  <ion-toolbar>
    <ion-buttons slot="start">
      <ion-menu-button></ion-menu-button>
      <!-- Does not work with #backButton -->
      <ion-back-button id="backButton" defaultHref="/"></ion-back-button>
    </ion-buttons>
    <ion-title>
      Second
    </ion-title>
  </ion-toolbar>
</ion-header>

<ion-content padding></ion-content>

附笔。:

[routerDirection] = "'forward'"

就像在项目中的“app.component.html” 侧菜单

<ion-item [routerDirection]="'forward'" [routerLink]="[p.url]">

https://beta.ionicframework.com/docs/api/buttons/

你可以用“从‘离子angulr’导入{navController}”来解决这个问题 但这会给你一个Rxjs的错误。所以你可能想这么做。。。

在app-routing.module.ts中,确保在path和loadChildren中正确指定了页面及其模块。这是我的

const routes: Routes = [ { path: '', redirectTo: 'login', pathMatch: 'full' },

{ path: 'register', loadChildren: './register/register.module#RegisterPageModule' },
{ path: 'login', loadChildren: './login/login.module#LoginPageModule' },
{ path: 'register', loadChildren: './register/register.module#RegisterPageModule' },
];

<ion-button size="large" routerLink="/register" routerDirection="forward" expand="block" #btnregister fill="clear" color="primary">Register</ion-button>

 this.deeplink.route({
          '/registration/:userid': RegistrationPage,
          '/registration': RegistrationPage,
      }).subscribe((match) => {  
        this.router.navigateByUrl(match.$link.path, match.$args)  
        console.log("Deeplink =>", match);

        }, err => {
          console.log("Deeplink Error=>", err)
          alert("Deeplink Error=>" + err)
        })
    })