You don't need to draw a super-eclipse.
Draw your icon as a square and Apple will do that for you.
You can use this website to create all icons with the good size and good name for iOS 6, 7 and Android.
EDIT :
But, if you want to design your own icon for a button (for example) you can use this template of .psd
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.