how to create a device specific app in objective c

I want to create an app which is 开发者_如何学JAVAspecific to the device type.Say my app should work only on iPhone but not on iPad or iPod even if it (the app) has common features.

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[[UIDevice currentDevice] model]; would give you the current device model.

Now, compare strings with the isEqualToString: rather than using the comparison operator.

Once done, you should write the functionality that you want to run, after doing the comparison.

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If your application is for App Store distribution you may be able to use the UIRequiredDeviceCapabilities key of Info.plist to produce a sufficiently restrictive set of requirements. Make this entry a dictionary and then for example setting a telephony=false value would exclude phone devices, still-camera=false value would exclude (current) iPads etc. The iTunes/App Store will then not allow a user to install the app on an unsupported device