Setting iOS background/lockscreen image programmatically?

Question

I'd like to be able to set the lockscreen background image programmatically. I'm aware that this is only possible for jailbroken iOS devices.

Here are some things that I've tried:

1. Place a LockBackground.png in /private/var/mobile/Library/SpringBoard/. This works but requires a hard respring. notify_post("com.apple.language.changed"); doesn't work for a soft respring.

2. Use class-dump to dump private methods of UIKit. UIKit in 4.2 used to have a method called + (void)setDesktopImageData:(id)fp8; but it appears to be missing in 4.3 and above.

Is there anything that I'm missing?

Answer 1

I found this in the SpringBoard dump which I think will be of use to you:

In SBWallpaperView.h:

- (void)replaceWallpaperWithImage:(id)image;

And in SBUIController.h:

- (id)wallpaperView;

So you can do something like:

[(SBWallpaperView *)[SBUIController sharedInstance] wallpaperView] replaceWallpaperWithImage:anImage];

That's one way.

The other one I found was to use SBWallpaperView's + (void)noteWallpaperPreferencesChanged;, I'm not that sure about this one, but it seems like if you do what you did in the first thing you tried, and then use this instead of a respring, it might work.