determine ipad device

Question

I am writing a universal app for both iphone and ipad. How do I determine if the device is an iPad. I have used this link to determine the iPhone type (3G, 3GS).

http://stackoverflow.com/questions/448162/determine-device-iphone-ipod-touch-with-iphone-sdk

Answer 1

It is highly recommended that you not do device type detection for determining if the application is running on an iPad, but that you examine either features or the user interface idiom. Many applications that test just for specific device types break when new hardware comes out (which tends to be pretty frequent).

Usually, if you need to determine if an application is running on an iPad, it is because you need to adjust the user interface to match the larger display area of the device. For that, Apple recommends that you check the user interface idiom using code like the following:

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
    // iPad-specific interface here
}
else
{
    // iPhone and iPod touch interface here
}

Answer 2

Brad's solution is absolutely right. If you're building a universal app designed to run on iPhones with older OS along with up-to-date iPads and iPhones, you might want to add this code to catch situations where the idiom is not defined.

// If iPhoneOS is 3.2 or greater then __IPHONE_3_2 will be defined
#ifndef __IPHONE_3_2    

typedef enum {
    UIUserInterfaceIdiomPhone,           // iPhone and iPod touch
    UIUserInterfaceIdiomPad,             // iPad
} UIUserInterfaceIdiom;

#define UI_USER_INTERFACE_IDIOM() UIUserInterfaceIdiomPhone

#endif // ifndef __IPHONE_3_2