How do applications that run on iOS3 and earlier select multiple images at a time like Image Picker?

I search through the web and only find that iOS 3 and earlier versions can only use the image picker control to select the photos. Is it the only way that we can give for user to select the photo?

I know iOS4 has an asset library allowing us to access the photo but how about the earlier version? Is it not possible to get the开发者_如何转开发 photos from those versions?

The problem with image picker is that it only allows the user to pick one image at a time.

You can access images using the PhotoLibrary framework. However, since it is a private framework, Apple won't accept it.