How to check if an iOS device is a retina display iPod touch?

Question

Is there a safe way to determine that a device is of a particular model? For example I must know if the device the user uses is a retina display iPod touch.

Answer 1

NSRange r = [[[UIDevice currentDevice] model] rangeOfString:@"iPod"];
float s = [[UIScreen mainScreen] scale];

if (r.location != NSNotFound && s > 1.5f) {
    // retina iTouch
}

Answer 2

I would probably try something like this:

+(BOOL) isRetinaiPod
{
    return [[[UIDevice currentDevice] model] isEqualToString:@"iPod touch"] && [UIScreen mainScreen].scale >= 2.0f;
}

However you can return the device's name with this:

+ (NSString *) deviceName 
{
    struct utsname u;
    uname(&u);
    return [NSString stringWithUTF8String:u.sysname];
}