Accelerometer is used for detecting the changes in the position of the device in the three directions x, y and z. We can know the current position of the device relative to the ground. For testing this example, you”ll need to run it on a device and to doesn”t work on simulator.

Accelerometer – Steps Involved

Step 1 − Create a simple View based application.

Step 2 − Add three labels in ViewController.xib and create ibOutlets naming them as xlabel, ylabel, and zlabel.

Step 3 − Update ViewController.h as follows −

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIAccelerometerDelegate> {
   IBOutlet UILabel *xlabel;
   IBOutlet UILabel *ylabel;
   IBOutlet UILabel *zlabel;
}
@end

Step 4 − Update ViewController.m as follows −

#import "ViewController.h"

@interface ViewController ()
@end

@implementation ViewController

- (void)viewDidLoad {
   [super viewDidLoad];
   [[UIAccelerometer sharedAccelerometer]setDelegate:self];
   //Do any additional setup after loading the view,typically from a nib
}

- (void)didReceiveMemoryWarning {
   [super didReceiveMemoryWarning];
   // Dispose of any resources that can be recreated.
}

- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:
   (UIAcceleration *)acceleration {
   [xlabel setText:[NSString stringWithFormat:@"%f",acceleration.x]];
   [ylabel setText:[NSString stringWithFormat:@"%f",acceleration.y]];
   [zlabel setText:[NSString stringWithFormat:@"%f",acceleration.z]];
}
@end

Output

When we run the application in iPhone device, we”ll get the following output −