How do I check the orientation of the device?

I'm loo开发者_运维问答king for a quick way to tell if the device is being held with the home button to the right or to the left. Is there a function to do so?

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Look at the UIDevice documentation. There is an orientation property available. Something like:

UIDeviceOrientation d = [[UIDevice currentDevice] orientation];

The values of d you are looking for are:

UIDeviceOrientationLandscapeLeft - The device is in landscape mode, with the device held upright and the home button on the right side.

UIDeviceOrientationLandscapeRight - The device is in landscape mode, with the device held upright and the home button on the left side.