How do you detect multiple iphone OS, equal to and greater than, using macros?

Question

Hi,

I am trying to execute different things depending on what os the users iPhone is using.

Currently I have the below, which says - "if the device is 3.1, post this message"

    #ifdef __IPHONE_3_1
    NSLog(@"this device is 3.1");
    #endif

But, How can I get it to say - "If the device is 3.1 or higher, post this message" ?

Thank you very much.

Answer 1

Well this seems to do it.

    #if __IPHONE_OS_VERSION_MAX_REQUIRED >= __IPHONE_3_2
    NSLog(@"this device less than 3.2");
    #endif

I don't know why though because, to me, it reads - " if the OS version is greater than or equal to 3.2"
But, it returns - "if the iPhone OS is below 3.2"

Can anyone explain what this actually means?

Answer 2

See http://stackoverflow.com/questions/820142/how-to-target-a-specific-iphone-version