Question

In iPhone can we set the lock screen, wallpaper and ringtone programmatically?

If Yes, then please let me know how to set them?

Answer 1

This can all be done easily, but will be rejected by Apple.

The ringtone can be changed by altering com.apple.SpringBoard.plist, specifically the ringtone key.

The following code can be used to read the actual ringtone title of custom ringtones (synced by iTunes).

NSMutableDictionary *custDict = [[NSMutableDictionary alloc] initWithContentsOfFile:@"/private/var/mobile/Media/iTunes_Control/iTunes/Ringtones.plist"];
NSMutableDictionary *dictionary = [custDict objectForKey:@"Ringtones"];

NSArray *keys = [dictionary allKeys];
id key = [keys objectAtIndex:indexPath.row];
NSMutableDictionary *customRingtone = [dictionary objectForKey:key];
NSString *name = [customRingtone objectForKey:@"Name"];
cell.textLabel.text = name;

The Wallpapers can be overwritten at:

NSString *homePath1 = @"/private/var/mobile/Library/SpringBoard/HomeBackground.jpg";
NSString *homePath2 = @"/private/var/mobile/Library/SpringBoard/HomeBackgroundPortrait.jpg";
NSString *lockPath1 = @"/private/var/mobile/Library/SpringBoard/LockBackground.jpg";
NSString *lockPath2 = @"/private/var/mobile/Library/SpringBoard/LockBackgroundPortrait.jpg";

These examples were used in one of my Cydia apps. Theres not really much more to them, but these should get you going in the right direction.