import { EventData , Frame , Button , ActionBar } from '@nativescript/core' ; const iconModes = [ 'automatic' , 'alwaysOriginal' , 'alwaysTemplate' , undefined ] ; export function navigate ( ) { Frame . topmost ( ) . navigate ( 'action-bar/clean-page' ) ; } export function onChangeRenderingMode ( args ) { const button = < Button > args . object ; const actionBar = < ActionBar > button . page . actionBar ; actionBar . iosIconRenderingMode = < 'automatic' | 'alwaysOriginal' | 'alwaysTemplate' > iconModes [ ( iconModes . indexOf ( actionBar . iosIconRenderingMode ) + 1 ) % iconModes . length ] ; button . text = '' + actionBar . iosIconRenderingMode ; }