[TIMOB-15272] iOS: Drag animation not working

var win = Ti.UI.createWindow({
    backgroundColor : "#fff"
});
var annoViewPosition;
var view = Ti.UI.createView({
    borderWidth : 1,
    borderColor : "#000000",
    left : 0,
    top : 0,
    height: 100,
    width: 100
});
win.add(view);
 
var lbltop;
var lblleft;
view.addEventListener('touchstart', function(e) {
        annoLblPosition = {
            top : e.source.top,
            left : e.source.left
        };
        lbltop = e.y;
        lblleft = e.x;
});
 
view.addEventListener('touchmove', function(e) {
    annoLblPosition.top += e.y - lbltop;
    annoLblPosition.left += e.x - lblleft;
    e.source.animate({
        top : annoLblPosition.top,
        left : annoLblPosition.left,
        duration : 5,
    });
});
 
win.open();