shopping app show the cart value in badge using NKNumberBadgeView

import NKNumberBadgeView from github add below lines

// Initialize NKNumberBadgeView...
MKNumberBadgeView *number = [[MKNumberBadgeView alloc] initWithFrame:CGRectMake(60, 00, 30,20)];
number.value = sum;

// Allocate UIButton
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(0, 0, 70, 30);
btn.layer.cornerRadius = 8;
[btn setTitle:@"Cart" forState:UIControlStateNormal];
// [btn addTarget:self action:@selector(hello) forControlEvents:UIControlEventTouchUpInside];

//[btn setBackgroundColor:[UIColor blueColor]];
[btn setBackgroundColor:[UIColor colorWithRed:0.0 green:0.0 blue:0.1 alpha:0.2]];
// btn.font = [UIFont systemFontOfSize:13];
// [btn setFont:[UIFont systemFontOfSize:13]];
[btn addSubview:number];
//Add NKNumberBadgeView as a subview on UIButton

// Initialize UIBarbuttonitem...
UIBarButtonItem *proe = [[UIBarButtonItem alloc] initWithCustomView:btn];
self.navigationItem.rightBarButtonItem = proe;

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