How do you optionally use iPhone OS 3.0 features in a 2.0 compatible app?

by

Apple has an example of how to do this, specifically making a 2.x-compatible app that uses MFMailComposeViewController….

http://developer.apple.com/iphone/library/samplecode/MailComposer/index.html

the answer involves compiling with the 3.0 SDK, setting the deployment target to 2.x, ensuring that the 3.0 frameworks are marked as “weak” references, and then doing the right thing to make your code work if you’re on a device where the new frameworks aren’t present.

More Related Contents:

  1. How to make an iPhone app compatible with multiple SDK (firmware) versions
  2. How to include and use new fonts in iPhone SDK?
  3. Can I change the color of auto detected links on UITextView?
  4. Detecting the iPhone’s Ring / Silent / Mute switch using AVAudioPlayer not working?
  5. Easiest way to support multiple orientations? How do I load a custom NIB when the application is in Landscape?
  6. Is there a way for Xcode to warn about new API calls?
  7. How do I fix NSURLErrorDomain error -999 in iPhone 3.0 OS
  8. Prevent a UISearchDisplayController from hiding the navigation bar
  9. Can I select a specific block of text in a UITextField?
  10. Best way to check if an iPhone app is running for the first time
  11. MPMediaItems raw song data
  12. iPhone speech recognition API? [duplicate]
  13. How to extract orientation information from videos?
  14. Accessing & Using the MobileWiFi.framework
  15. How can an iPhone access another non-iPhone device over wireless or Bluetooth?
  16. UITextField for Phone Number
  17. How to renew an iPhone development certificate?
  18. Code Sign error: The identity ‘iPhone Developer: x Xxxxx’ doesn’t match any identity in any profile
  19. UIModalTransitionStylePartialCurl with UITabBarController
  20. Dynamic (Default.png) splashscreen in 3.0 [iPhone SDK]
  21. How to change Xcode Project name
  22. Deactivate UIScrollView decelerating
  23. Learning the basics of UIScrollView
  24. how to get the event that switch tab menu on iphone
  25. How to download PDF and store it locally on iPhone?
  26. Where are the UIKit Framework implementation files located?
  27. How to get UIMenuController work for a custom view?
  28. iphone – How do I add videos to iPad simulator?
  29. idleTimerDisabled not working since iPhone 3.0
  30. Temporarily Lock or Disable iphone home button

Leave a Comment