NativeScript/tests/app/ui/frame/frame.md

nav-title	title	environment	description	previous_url
frame How-To	frame	nativescript	Examples for using frame	/ApiReference/ui/frame/HOW-TO

Frame

To perform navigation, you will need a reference to the topmost frame of the application. {%snippet frame-require%}

Navigating to a Module

{%snippet frame-navigating%}

Navigating with a Factory Function

{%snippet frame-factory-func%}

Navigating with NavigationEntry

{%snippet frame-naventry%}

Navigating Back

{%snippet frame-back%}

Back Navigation with BackstackEntry

Using the BackstackEntry allows us to navigate back to a specific page.

<Page xmlns="http://schemas.nativescript.org/tns.xsd" navigatingTo="navigatingTo" class="page">

    <Page.actionBar>
        <ActionBar title="Page 5" icon="" class="action-bar">
        </ActionBar>
    </Page.actionBar>

    <StackLayout class="p-20">
        <Label text="Page 5" class="h1 text-center"/>
        <Button text="back to the first page" tap="onTap" class="btn btn-primary btn-active"/>
    </StackLayout>
</Page>

import {BackstackEntry, Frame} from "ui/frame"

export function backNavigation(args){
    const backstackEntryFirstPage = args.object.page.frame.backStack[0];
    const frame = args.object.page.frame;
    frame.goBack(backstackEntryFirstPage);
}

With the help of the Frame we access the page's BackstackEntry by providing the the sequence number - backStack[<page number>]. In the example above we will navigate back to the initial page and to do that we need to take the first BackstackEntry as follow: Frame.topmost().backStack[0]

NB: We start counting the pages from 0. If we need to take the entry for the first page we need to take the it while using the 0 index, for the second 1 index, etc.