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16. Core Motion > 16.5. Retrieving Gyroscope Data
You want to be able to retrieve information about the device’s motion from the gyroscope hardware on an iOS device.
Follow these steps:
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Find out whether the gyroscope hardware is available on the iOS device. Please refer to Recipe 16.2 for directions on how to do this.
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If the gyroscope hardware is available, make sure it is not already sending you updates. Please refer to Recipe 16.2 for directions.
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Use the
setGyroUpdateInterval:instance method ofCMMotionManagerto set the number of updates you want to receive per second. For instance, for 20 updates per second (one second), set this value to 1.0/20.0.
