IOS get time problem

var ff = '2018-04-30 14:20:30';
var reg = / - | |: / g;
var IosstartTime = ff.replace (reg, ',');
var str = IosstartTime + '';
var arr = str.split (',');
var vv = new Date (arr [0], arr [1], arr [2], arr [3], arr [4], arr [5]);
alert (vv);