How to do a cross-platform loading indicator module.

controller.js

var loading = require('functions').loading;

loading.setMessage('Autenticando...');
loading.show();

setTimeout(function(){
    loading.hide();
},5000);
        

functions.js

exports.loading = function(){
    if(OS_IOS){
        var activityWrapper= Ti.UI.createWindow({
            width: '120dp',
            height: '120dp',
            backgroundColor: 'black',
            opacity: 0.7,
            borderRadius: 5,
        });
        
        var activityIndicator=Ti.UI.createActivityIndicator({
            color: 'white',
            font: {fontFamily:'Helvetica Neue', fontSize:'12sp'},
            message: 'Autenticando...',
            height:Ti.UI.SIZE,
            width:Ti.UI.SIZE
        });
    }else{
        var activityIndicator = Ti.UI.Android.createProgressIndicator({
            message: 'Autenticando...',
            location: Ti.UI.Android.PROGRESS_INDICATOR_DIALOG,
            type: Ti.UI.Android.PROGRESS_INDICATOR_INDETERMINANT,
            cancelable: false,
        });
    }
    
    return {
        setMessage: function(msg){
            activityIndicator.message = msg;
        },
        show: function(){
            if(OS_IOS){
                activityWrapper.add(activityIndicator);
                activityWrapper.open();
            }
            activityIndicator.show();
        },
        hide: function(){
                activityIndicator.hide();
            if(OS_IOS){
                activityWrapper.remove(activityIndicator);
                activityWrapper.close();
            }
        },
    };  
}();