Ionic Platform & Nav Controller Life Cycle Events

Piashsarker/IonicLifeCycle

Cordova Life Cycle Event

Cordova Event Supported Platforms

Pause Event

The pause event emits when the native platform puts the application into the background, typically when the user switches to a different application.This event would emit when a Cordova app is put into the background, however, it would not fire on a standard web browser.

platform.pause.subscribe((result)=>{
     console.log("Platform Pause Event");
});

Resize Event

The resize event emits when the native platform pulls the application out from the background. This event would emit when a Cordova app comes out from the background, however, it would not fire on a standard web browser.

platform.resize.subscribe((result)=>{
    console.log('Platform Resize Event');
});

Resume Event

The resume event emits when the native platform pulls the application out from the background. This event would emit when a Cordova app comes out from the background, however, it would not fire on a standard web browser.

platform.resume.subscribe((result)=>{
    console.log('Platform Resume Event');
});

Nav Guards & Nav Controller Life Cycle Event

ionViewCanEnter(): Nav Guards

Fired before entering into a view, allows you to control whether the view can be accessed or not (returning true or false).

ionViewCanEnter(){
   console.log("ionViewCanEnter HomePage.");
}

ionViewCanLeave(): Nav Guards

ionViewCanLeave(){
  console.log('ionViewCanLeave SecondPage.');
}

ionViewDidLoad():

Fired only when a view is stored in memory. This event is NOT fired on entering a view that is already cached. It’s a nice place for init related tasks.

ionViewDidLoad(){
 console.log("ionViewDidLoad HomePage.");
}

ionViewWillEnter():

It’s fired when entering a page, before it becomes the active one. Use it for tasks you want to do every time you enter in the view (setting event listeners, updating a table, etc.).

ionViewWillEnter(){
  console.log('ionViewWillEnter HomePage.');
}

ionViewDidEnter():

Fired when entering a page, after it becomes the active page. Quite similar to the previous one.

ionViewDidEnter(){
  console.log('ionViewDidEnter HomePage.');
}

ionViewWillLeave():

Fired when you leave a page, before it stops being the active one. Use it for things you need to run every time you are leaving a page (deactivate event listeners, etc.).

ionViewWillLeave(){
    console.log('ionViewWillLeave HomePage.');
}

ionViewDidLeave():

Fired when you leave a page, after it stops being the active one. Similar to the previous one.

ionViewDidLeave(){
  console.log('ionViewDidLeave HomePage.');
}

ionViewWillUnload():

Fired when a view is going to be completely removed (after leaving a non-cached view).

ionViewWillUnload(){
 console.log('ionViewWillUnload');
}

Sample Source Code

Piashsarker/IonicLifeCycle

Reference

Ionic Framework

Navigating Lifecycle Events!

Events - Apache Cordova