[ionic 4] ionViewWillEnter only triggers once.

Bug Report

Ionic Info Run ionic info from a terminal/cmd prompt and paste the output below.

Ionic:

   ionic (Ionic CLI)          : 4.0.5
   Ionic Framework            : @ionic/angular 4.0.0-beta.3
   @angular-devkit/core       : 0.7.2
   @angular-devkit/schematics : 0.7.2
   @angular/cli               : 6.1.2
   @ionic/ng-toolkit          : 1.0.5
   @ionic/schematics-angular  : 1.0.4

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.0.0, ios 4.5.5

System:

   Android SDK Tools : 25.2.5
   ios-deploy        : 1.9.2
   ios-sim           : 6.1.2
   NodeJS            : v7.4.0 (/usr/local/bin/node)
   npm               : 4.0.5
   OS                : macOS High Sierra
   Xcode             : Xcode 9.4.1 Build version 9F2000

Environment:

   ANDROID_HOME : /usr/local/Cellar/android-sdk/24.4.1_1

Describe the Bug The ionViewWillEnter lifecycle (if its still called that) only triggers once. In ionic 3 the ionViewWillEnter triggered every time you navigated to the view. Now it only triggers the first time.

Steps to Reproduce Steps to reproduce the behavior:

1. Add ionViewWillEnter to your view

public ionViewWillEnter(): void {
     console.log('hi');
}

1. Navigate to the page
2. Navigate to a different page
3. Navigate again to the page with the ionViewWillEnter

Expected Behavior Expect the console.log('hi') to be logged every time I navigate to the view.

Additional Context Note that I use tabs. Is there perphaps a Angular lifecycle which replaced ionViewWillEnter?

-- tabs
     -- View 1 (with ionViewWillEnter)
     -- View 2

[dtaalbers]

In the meanwhile, as a workaround, I am using below setup to mock the ionViewWillEnter event. Note that the url in the subscription should be that of the current page.

import { OnEnter } from '../on-enter';
import { Component, OnDestroy, OnInit } from '@angular/core';
import { Subscription } from 'rxjs/Subscription';
import { NavigationEnd, Router } from '@angular/router';

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

    private subscription: Subscription;

    constructor(
        private router: Router
    ) { }

    public async ngOnInit(): Promise<void> {
        await this.onEnter();

        this.subscription = this.router.events.subscribe((event) => {
            if (event instanceof NavigationEnd && event.url === '/tabs/(home:home)') {
                this.onEnter();
            }
        });
    }

    public async onEnter(): Promise<void> {
        // do your on enter page stuff here
    }

    public ngOnDestroy(): void {
        this.subscription.unsubscribe();
    }
}

Custom interface

export interface OnEnter {
    onEnter(): Promise<void>;
}

[billymahmood]

Hi guys,

any thing on this from the Ionic team yet?