IPhone : Action Elements in a draggable view using UIPanGestureRecognizer causes the view to shift

I wanted to create a draggable view which has many action elements. To accomplish this I replicated the code through Apple Documentation for creating a draggable view from here.

The view gets panned as expected but when an action element is clicked the view shifts to some other location. Here is the sample code and a screenshot of Main.storyboard to replicate the issue.

ViewController.h file

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

- (IBAction)segmentedAction:(id)sender;
@property (weak, nonatomic) IBOutlet UISegmentedControl *segmentOutlet;
@property (weak, nonatomic) IBOutlet UILabel *label;

@end

And this is the code in the ViewController.m file

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // 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)adjustAnchorPointForGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
{
    if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
        UIView *piece = gestureRecognizer.view;
        CGPoint locationInView = [gestureRecognizer locationInView:piece];
        CGPoint locationInSuperview = [gestureRecognizer locationInView:piece.superview];

        piece.layer.anchorPoint = CGPointMake(locationInView.x / piece.bounds.size.width, locationInView.y / piece.bounds.size.height);
        piece.center = locationInSuperview;
    }
}
- (IBAction)panPiece:(UIPanGestureRecognizer *)gestureRecognizer
{
    UIView *piece = [gestureRecognizer view];

    [self adjustAnchorPointForGestureRecognizer:gestureRecognizer];

    if ([gestureRecognizer state] == UIGestureRecognizerStateBegan || [gestureRecognizer state] == UIGestureRecognizerStateChanged) {
        CGPoint translation = [gestureRecognizer translationInView:self.view];

        [piece setCenter:CGPointMake([piece center].x + translation.x, [piece center].y + translation.y)];
        [gestureRecognizer setTranslation:CGPointZero inView:self.view];
    }
}
- (IBAction)segmentedAction:(id)sender {
    self.label.text = [NSString stringWithFormat:@"%ld",self.segmentOutlet.selectedSegmentIndex];
}
@end

Can anybody guide me as to what I'm doing wrong here.

Thanks in advance