If you don't mind adding an extra step of selecting the camera roll from an album list you can try changing your sourceType from SavedPhotoAlbums to PhotoLibrary:
imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
After selecting the desired album, the next photo selection view will show the most recent images at the bottom.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…