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Ten+ Golden Rules of Jonathan Wight to avoid your iPhone app from rejection

Ten+ Golden Rules of Jonathan Wight to avoid your iPhone app from rejection

By Michiel Suijkerbuijk

1. Beware the simulator:
• Simulator has a lot of memory and is really fast
• Develop and test on the device
• Test any new feature on the device ASAP
• Do not give in to the Dark Side

2. Plan for no/bad networks
• Work gracefully under poor/non-existent network conditions
• Behaving badly could get you rejected
• Network conditions will change at the worse time
• Use Apple's "reach ability" sample code

3. Don't write to the disk
• Write only what you have to
• Don't block on writes
• Wright only when app isn't busy
• Beware of limited room in RAM

4. Respect the memory manager
• Learn de Cocoa memory management rules
• Beware of retain cycles
• Don't leak (static analyses can help)
• Do the right thing for outlets in NIB's
• Handle low memory warnings

5. Optimise the launch experience
• User's first experience is crucial
• Launch quickly or die trying
• Use background operations
• Don't a lock-in until you need to
• Save and restore state

6. Use Reality Based testing
• Test on actual devices
• Use real people to test your app
• If using GPS, test in real places

7. Stay responsive
• Mobile apps need to stay responsive to users
• Quit quickly if needed
• Don't block the main thread
• Use operation Queues
• NSInvocatoinOperation is a time saver

8. Static Analyser
• Use the Clang static analyser
• Built into xCode 3.1+ but
• Command line tool seems more strict
• http://clang-analyzer.llvm.org/
• Use it but don't rely on it

9. Use Alpha Wisely
• Optimise your UI with opacity
• Use Alpha transparency with caution
• Pre-render when possible
• Use UI images when at all possible

10. UI Table View
• If the only tool you have is UI TV everything looks like a table
• Don't lay out your UI by hand, use UI TV
• Optimise your Table Views
• Optimise your Table View coding

Some other tips:
• Befriend your apple representative
• Prevent rejection by:
• Appstore rejection is costly: (-2 weeks)
• Test test test
• Release on your own schedule
• Avoid the app store for fixes
• Make your app data driven

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