Turing off functionality dpending on device iPhone, or iPod touch

I have what i thought was a relatively simple question but i cannot find an answer to it yet. I have an iPhone app that uses GPS on one of its screens. I want to 开发者_StackOverflow中文版disable this screen using code when the app loads,so disable it when a iPod touch is being used. This is so it can still be useful on a iPod touch as there is a lot of functionality that a iPod touch user can use.

Thanks.

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You can get there with @Aaron's answer, but that's not the way to do it. Use [CLLocationManager locationServicesEnabled]; to tell if you can determine the users's location. This is a lot more robust than making decisions based on the device model.

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to get the device info..

http://developer.apple.com/library/ios/#documentation/UIKit/Reference/UIDevice_Class/Reference/UIDevice.html

NSString *deviceType = [UIDevice currentDevice].model;

I think if you are just checking for GPS then you will need to access the CLLocationManager to see if it is on or off