Best Practices

From iPhone Development Wiki
Revision as of 04:03, 16 April 2013 by Dustin Howett (talk | contribs) (.DS_Store reference makes more sense in Best Practices than MS Pitfalls.)
Jump to: navigation, search

Use the following guidelines to avoid your package or app being fragile and to increase the chances of it being accepted by a community host.

Applications and Tweaks

  • Avoid referring to /var/mobile directly - use NSHomeDirectory() if your code is running as mobile!
    • If your code is running as root, use extra caution when writing files that mobile can access - you might break the file's access permissions.
  • See MobileSubstrate Pitfalls for additional guidelines regarding tweaks.


  • Do not create mobile-owned files and/or directories in your package. Stay out of mobile's home directory!
    • All package files are installed as root. Your software should create any required files or directories at runtime.
    • This is doubly important for preferences. A user's preferences do not belong in a package: if preferences are stored in the package, they will be overwritten when you release an update, and deleted when the user uninstalls your software (even temporarily!)
  • Do not use postinst/preinst/extrainst_ for file management purposes!
    • Do not store in the package files or directories that your software could create.
    • Do not enforce permissions that your package should contain. dpkg uses an expressive packaging format that has support for permissions, ownership, and links. Use that support!
  • Make sure your package doesn't include hidden .DS_Store, ._*, or thumbs.db files.