ionic 3 from tabbed page to normal page - ionic-framework

Question

Pages structure is: Tabs(page1,page2,page3).
When I click a button within in page1, I want to go to page4,
but now we still can see tab, how to make page4 displays as a normal page and can back to tabbed page.
In page1, I use below line to go to page4
this.navCtrl.push(page4);

Answer 1

I think you could first try the following, which is for test only to understand
that this is achievable:
pass params to the ion-tabs like this:
<ion-tabs>
<ion-tab [root]="tabMap" [rootParams]="tabParams" tabIcon="map"></ion-tab>
<ion-tab [root]="tabList" [rootParams]="tabParams" tabIcon="list"></ion-tab>
</ion-tabs>
Prepare the params in the tabs.ts like this:
ionViewWillEnter() {
this.tabParams.parentNav = this.navCtrl;
}
So in the inner page (page1, 2, 3) you can retrieve it, place it in a variable e.g. parentNav, and when you want to navigate out of the tabs page to do a this.parentNav.push(page4).
The proper way I think is to use events events: ionic forum
So in the tabs.ts page you could have this piece of code:
events.subscribe('tabs:newPage', (page) => {
this.navCtrl.push(page);
});
And in each page, or in a service you could have:
newPage(page) {
console.log('navigate to a new page, not a tab')
this.events.publish('tabs:newPage', page);
}

Answer 2

What ionic is ?
If lazy loading,maybe ionic 3 , hod did you declare page4?
You have to push it like this : this.navCtr.push('page4');
If is all ok try this (it 's extracted form an app example) :
static get parameters() {
return [[IonicApp], [NavController], [ConferenceData], [UserData]];
}
constructor(app, nav, ...) {
// all of the constructor code
}
tourFunction() {
let nav = this.app.getComponent('nav');
nav.push('page4');
}
Ref