javascript - sencha touch hide and show a component on tab of a button -

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i have created app views , there list button on top left corner display , hide list on tap event. how able hide on tab don't know how display again. default should hidden on tap of button should hide , show self depending on current property.

iconcls: 'list', iconmask: true, ui: 'plain', handler: function() {         ext.getcmp('ext-listnavigation-1').hide();             }

and list view code

ext.define('ov_app.store.navigationitems', {     extend: 'ext.data.store', config:{     model: 'ov_app.model.items',      data:[         { items:"services"},         { items:"solutions"},         { items:"about us"},         { items:"why singapore"},         { items:"contact us"}     ] } });

the user inter phase looks enter image description here

as can see hide , show (services,solution, etc.. ) on tap of list button above list.

var list = ext.getcmp('ext-listnavigation-1');  if (list.ishidden()) {   list.show(); } else {   list.hide(); }

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