I need help figuring out how to set my current page as the root page after validating something, such as starting a service. The idea is that once the service has started, the user should not be able to go back to the previous page until they have finished with the current one. However, if the service has not been started yet, then the user should still be able to go back to the previous page.
Does anyone know how to accomplish this?
Thank you!
If you find yourself already on the particular page, instead of designating it as Root, consider utilizing Nav Guards
In certain scenarios, a developer may need to manage views entering and exiting. In order to facilitate this, NavController offers the ionViewCanEnter and ionViewCanLeave methods. These methods are akin to Angular 2 route guards, but they are more seamlessly integrated with NavController.
For instance, if we need to confirm that a service has begun but hasn't completed yet, and restrict the user from navigating away until the service finishes.
To achieve this, employ code similar to the following:
// Procedure executed when the user attempts to leave the page
ionViewCanLeave() {
if(this.serviceHasStarted && !this.serviceHasFinished) {
let showAlertMessage = this.alertCtrl.create({
title: 'Error',
message: 'You cannot proceed until ...',
buttons: [
{
text: 'Ok',
handler: () => {
}
}]
});
showAlertMessage.present();
// Return false to block the user from leaving the page
return false;
} else {
// Return true to permit the user to navigate away
return true;
}
}
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