I wonder if developer has some sort of ways to be able to view file system on iOS device like iFile but without jailbreak the device?
Need it for devlopement purpose.
When your iOS device is connected to your computer and correctly provisioned for development, you can use Xcode 4 to download files for your own projects, and not only the files in the Documents directory.
Refer to this other answer: How to download app data in Xcode 4.2