How can I get iphone device type?

Question

I want to get iphone device type if it is iphone 2 or 3G or 4 in xcode 4.0.

Is there any way to get it?

If it is, please tell me.

Answer 1

Caleb is right, you shouldn't check for device type, but for functionality. For example, you can check whether the device supports multitasking like so:

UIDevice *device = [UIDevice currentDevice];
if ([device respondsToSelector:@selector(isMultitaskingSupported)] && [device isMultitaskingSupported]) {
    // ...code to be executed if multitasking is supported.
    // respondsToSelector: is very useful
}

If you must, you can check the iOS version, but know this is not a substitute for checking whether an object respondsToSelector:.

#define IOS4_0 40000

// You'd probably want to put this in a convenient method
NSArray *versions = [[UIDevice currentDevice].systemVersion componentsSeparatedByString:@"."];
NSInteger major = [[versions objectAtIndex:0] intValue];
NSInteger minor = [[versions objectAtIndex:1] intValue];
NSInteger version = major * 10000 + minor * 100;

if (version >= IOS4_0) {
    // ...code to be executed for iOS4.0+
}

As far as I know, there is no documented way to check the device model.