iPhone check firmware version

Question

HI all

I want to make one app for iPhone 2.2.* and for version 3.0. Some method in 2.2* is deprecated in 3.0. ( like UITableViewCell setText and setLabel )

Is there any way to check which firmware version is used on iPhone and to set different method to use

Answer 1

You will need to use pre-processor directives for the conditional compilation such as __IPHONE_3_0 and build two separate executables.

For example:

 #ifdef __IPHONE_3_0
 // code specific to version 3
 #else
 // code specific to version 2
 #end

If you need to detect the version at run-time you can use [[UIDevice currentDevice] systemVersion]. It returns the string with the current version of the iPhone OS.

Answer 2

As I mentioned in the comments before, check: http://stackoverflow.com/questions/820142/how-to-target-a-specific-iphone-version

Answer 3

As mentioned in the other referenced thread, while you can use pre-processor directives to generate two applications from one code base, you will still need two applications (one for 2.x and one for 3.x)

A compile time directive cannot be used to make a run time decision.

There's more detail in the other thread.