How can I make a iPhone app compatible to 2.2.1 and 3.1 SDK?

Question

I have made some apps in 2.2.1 now when I run the same app in 3.1 it gives errors. Changing the codes is a solution I am not looking for. I am looking for some pre-processor directives that can make my app compatible to both SDKs. Something like #ifdef.

Thank You All.

What's broken? You might have to change the codes... But you could change the codes in a way that maintains compatibility with 2.2.1. Those darn codes. — Nick Veys, Jul 29 '09 at 05:03

score 3 · Accepted Answer · edited May 23 '17 at 12:01

3

Similar to How to target a specific iPhone version?

You can use this #define to change what you build for each SDK...

#if __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_2_2
// iPhone 3.0 code here
#endif
And do this at run-time to run code for 3.0 and above:

float version = [[[UIDevice currentDevice] systemVersion] floatValue];
if (version >= 3.0){
    // iPhone 3.0 code here
}

edited May 23 '17 at 12:01

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answered Jul 29 '09 at 05:11

micmoo

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Thanks micmoo,I am going to try it it out. – SocialCircus Jul 29 '09 at 05:39

How can I make a iPhone app compatible to 2.2.1 and 3.1 SDK?

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