How to check in which position (landscape or portrait) is the iPhone now?

Here are macros UIDeviceOrientationIsLandscape and UIDeviceOrientationIsPortrait

so rather checking separately you can do it like this …

if (UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation))
{
    // code for landscape orientation      
}

OR

 if (UIDeviceOrientationIsPortrait([UIDevice currentDevice].orientation))
 {
     // code for Portrait orientation       
 }