Every iOS application has its own application sandbox. An application sandbox is a directory on the filesystem that is barricaded from the rest of the filesystem. Your application must stay in its sandbox, and no other application can access your sandbox. Figure 15.4 shows the application sandbox for iTunes/iCloud.
Figure 15.4 Application sandbox
The application sandbox contains a number of directories:
This directory is where you write data that the application generates during runtime and that you want to persist between runs of the application. It is backed up when the device ...