In your program, you want to detect whether the accelerometer hardware is available.

Use the isAccelerometerAvailable method of CMMotionManager to detect the accelerometer hardware. The isAccelerometerActive method can also be used to detect whether the accelerometer hardware is currently sending updates to the program.

Let’s first make sure we have imported the required header files:

#import <UIKit/UIKit.h>
#import <CoreMotion/CoreMotion.h>

@interface Detecting_the_Availability_of_an_AccelerometerAppDelegate
           : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

Next, go on to detect the availability of accelerometer in the implementation file of our app delegate: