Generating a random default screen on iOS

Question

One of the prerequisites within Xcode is setting the 'Default' and 'Default@2x' images for when the iPhone app loads up.

Is it all possible to have a number of Default screens made, inserted into the project in png format and each time the app is loaded, choose a random default screen to use?

Answer 1

You cannot change Default.png. Once the app is shipped - it's "set in stone". Until the next release, that is. The reason is simple (and same why you can't change apps icon). App's bundle is read-only. It is made read only because it is signed by you and by apple. Modifying the contents of the bundle would invalidate the signature.

Answer 2

You can change the default screen in iOS (at least after first launch) by setting UILaunchImageFile property in the info.plist, and then writing a new image to the Documents folder.

eg.

<key>UILaunchImageFile</key>
<string>../Documents/NewDefault.png</string> 

then write your random splash to /Documents/NewDefault.png.

---

Seems i have to be more prescriptive... I am not suggesting you modify anything in your app bundle at runtime, as has been said, that cannot occur.

But because the /Documents folder sits next to the .app folder, you can set the UILaunchImageFile via a relative path, and then put a file at the path specified when the app runs.