The Shahe Catalogue of the iOS app is detailed

For security reasons, an app can have only a few directories to write to the app's data or preference parameters. When an app is installed to the system, the app's home directory is created. The following is a list of the main subdirectories under the home directory:
/appname.app: Store the application itself
/documents/: Storing user documents and application data files
/library/: The top-level directory of the application specification, the following are some specification-defined subdirectories, of course, can also customize subdirectories, for the application of files, but not to store user data files, and document will be synchronized with itunes, but not including the caches subdirectory
/library/preferences, which stores the preference files required by the program specification
/library/caches, save your app's persisted data for app upgrades or app-closed data save, not synced by itunes, so in order to reduce sync time, consider putting some larger files in this directory without needing to back up the files.
/tmp/, save the application data, but do not need to persist, after the application is closed, the data in the directory will be deleted, or the system can be made clear when the program is not running

IPA package test, if the customer at the ends of the earth, and his equipment is not jailbroken, but he must test the new version of the app, how to let him install the app. There is a testflightapp third-party test platform, put the IPA package up, generate an address, so that you can access the IPA package according to the address.

The Shahe Catalogue of the iOS app is detailed