How to detect current iOS is 4.1 or 4.2? [duplicate]

Question

Possible Duplicate:
Check iPhone iOS Version

I tried with this code:

#if (__IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_2_2)
    NSLog(@"iPhone 4.2");
#endif

but when I run it again on simulator 4.1, I still get the log "iPhone 4.2" in console.

Thanks for helping me.

Tung Do

Answer 1

You should probably avoid asking about the system version altogether.

A better design would ask about a specific feature.

For instance: if (NSClassFromString(@"UIPrintInfo")) would tell you if the current device supports the printing API,available in 4.2 or higher.

That way you can plan your code to use a feature if it's available, on not based on the OS version.

Answer 2

float version = [[[UIDevice currentDevice] systemVersion] floatValue];