Ionic 4 ngOnDestroy not called from component on page navigation

[BrentAshWilliams]

Also found this earlier post:

Lifecycle hooks for inner components

I am running into same problem here where in my custom component I need functionality of ionViewWillEnter() and ionViewWillLeave(). Angular2 lifecycle hooks dont really provide that. Wondering how did you guys solve this? One hack I can think of is to change my component to a IonicPage. As far as I see, there isnt much difference between the two. Any downside to this?

An inner component knows nothing about Ionic lifecycle events. Ionic/pages will not notify inner components about loading, become the active page, etc. If you need your inner component to do something based on lifecycle events, tie the parent lifecycle event with the inner component using Angular’s @ViewChild decorator.

In parent component get a reference to the child component using @ViewChild as explained here . Then, inside the parent lifecycle event, call a public function defined in child component.