Autolayout for iphone 6 and iphone 6 plus

Question

I have been try a good solution for this problem... I have an app and this work perfect in iphone 4, and iphone 5, But in iphone 6 and 6 plus i don't know how made a good solution with autolayout.

the problem is: my app is a clone of a home screen, and i need that all the icons have the same position in all devices

I don't know how to let the space between the icons flexible

iphone 4 and 5

for iphone 6 should look like, but if it works for one does not work in another

Thanks