NativeScript/apps/app/modaltest/modal-tab.xml

<TabView backgroundColor="red" loaded="onLoaded">
    <TabViewItem title="Button">
        <StackLayout backgroundColor="orange"
            verticalAlignment="bottom"
            horizontalAlignment="right">
            <Button text="LIVESYNC" tap="onLiveSync" />
            <Button text="Close Modal" tap="closeModal" />
            <Button text="Show Modal Frame" tap="onModalFrame" />
            <TextView text="text viesw" />
            <TextField text="text field" />
            <TextField text="text field" />
            <Button text="Button" />
        </StackLayout>
    </TabViewItem>
    <TabViewItem title="Frame">
        <Frame backgroundColor="green">
            <Page backgroundColor="blue" actionBarHidden="true" loaded="pageLoaded">
                <Page.actionBar>
                    <ActionBar title="Frame in Modal Page" />
                    <ActionItem text="close" tap="closeModal" />
                </Page.actionBar>
                <ScrollView backgroundColor="cyan">
                    <StackLayout backgroundColor="pink" verticalAlignment="bottom" >
                        <Label text="I'm frame in modal page" />
                        <Label text="Tap the button" />
                        <Button text="TAP" tap="onTap" />
                        <Button text="Do 10 go backs" tap="tenGoBacks" />
                        <Button text="Navigate To Page with Frame" tap="navigateToPageWithFrame" />
                    </StackLayout>
                </ScrollView>
            </Page>
        </Frame>
    </TabViewItem>
    <TabViewItem title="Item 3">
        <ScrollView>
            <StackLayout verticalAlignment="bottom" horizontalAlignment="right">
                <Button text="Close Modal" tap="closeModal" />
                <Button text="Show Modal Frame" tap="onModalFrame" />
            </StackLayout>
        </ScrollView>
    </TabViewItem> 
</TabView>