NSJSONSerialization crash with Facebook iOS SDK 3.5

Question

After I updated Facebook iOS SDK from 3.2 to 3.5 I'm getting this error when running my app in a device with iOS older than 5 (eg 4.3.5).

dyld: Symbol not found: _OBJC_CLASS_$_NSJSONSerialization
...
Expected in: /System/Library/Frameworks/Foundation.framework/Foundation

I can avoid this crash if I set Foundation framework as Optional, but I don't think this is the best option.

Is there another way to make Facebook SDK works in devices with iOS previous to version 5?

Answer 1

From Facebook iOS SDK changelog v3.5: http://developers.facebook.com/ios/change-log-3.x/

Removes support for iOS 4.* Facebook 6.0 dropped support for iOS 4.x. To stay in sync, the Facebook SDK is also does not support iOS 4.x.

So, if you update to Facebook SDK 3.5 you lose support for iOS 4.x