fix: handle x/y position for touch in dragstart/dragend events on iOS

[deckameron]

var win = Ti.UI.createWindow();

var scrollView = Ti.UI.createScrollView({
 showVerticalScrollIndicator: true,
 showHorizontalScrollIndicator: true,
 height: '80%',
 width: '80%'
});
var view = Ti.UI.createView({
 backgroundColor:'#336699',
 borderRadius: 10,
 top: 10,
 height: 2000,
 width: 1000
});
scrollView.add(view);
scrollView.addEventListener("dragstart", function(e){
   console.log(e.x, e.y);
})
scrollView.addEventListener("dragend", function(e){
   console.log(e.x, e.y);
})
win.add(scrollView);
win.open();

The Android version is this:
#14102

[hansemannn]

Hi @deckameron! Thanks for your PR! Can you rename "drag_dict" to "event" or "dict" for better consistency please? We usually don't use snake_case in the code :-) That'd be great! And we need the CLA signed once, you can learn more about it here. tldr: Contact @joshualambert via TiSlack

[m1ga]

you can use https://tidev.io/contribute to automatically sign the CLA

[hansemannn]

Thx! I just updated the page

[deckameron]

Thanks guys!
I just signed the CLA and pushed the update you requested. :-)

[hansemannn]

Awesome, thank you! Great improvement!

[m1ga]

@hansemannn can we merge the Android part of it too: #14102 it has the docs for this