you can't.
in uiimagepicker.sourcetype you can just choice
UIImagePickerControllerSourceTypeCamera : to load the camera
UIImagePickerControllerSourceTypePhotoLibrary : to load images from library
UIImagePickerControllerSourceTypeSavedPhotosAlbum : loads all images saved
however, you can do something similar following this guide
How to Write a Custom Image Picker like UIImagePicker | Ray Wenderlich
or you can take a look at three20 project, it have a component that you are asking for.
http://three20.info/overview
http://www.raywenderlich.com/1430/ho...0-photo-viewer
ps: don't bump each 1h, wait at least 1 day