iOS app image sizes and naming conventions

Question

It's a first time I am posting iPhone app to Apple. After much research I have not been able to find out answer to my questions and I don't want my app to be bounced back due to a silly thing. Please note that my app is only for iOS7. Below are my questions:

1) Do I've to provide 2 images one in low resoltion and another in high resolution?

2) I've read that background image or launch image for iPhone5 should have resolution of 640 x 1136. The same for iPhone4 is 640 x 960. Is there any naming convention for such images (both for iPhone4 and iPhone5)?

3) What should be the resolution for application icons? The resolutions which I know are 1024 X 1024 (required for app store) and 120 x 120. On some links I've read about resolutions of 72px x 72px and 114px x 114px instead of 120 x 120.

Help will be greatly appreciated. Thanks.

Answer 1

1) If you are only targeting retina devices (i.e. iOS 7 only on iPhones) you can provide only the 2x assets.

2) There's a naming convention for the launch image, which is

• Default@2x.png (iPhone 3.5-inch retina display)
• Default-568h@2x.png (iPhone 4-inch retina display)

Concerning other assets (actually including also launch images) you'd better use the Asset Catalog, which helps you in keeping track of assets for different resolutions.

3) It's 120px. 114px was the resolution on iOS 6 and prior versions.

Answer 2

Instead Directly giving answer to you, I'll give some apple document which is most useful related to your question. Read App Launch (Default) Images topic in this apple's document for naming convention. This will show you launch images size. It will show you about tabbar and Icon images size.