拍照识别银行卡卡号

#import "ViewController.h"
#import "CardIO.h"

@interface ViewController ()<CardIOPaymentViewControllerDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    UIButton * btn = [UIButton buttonWithType:UIButtonTypeCustom];
    btn.frame = CGRectMake(100, 100, 100, 100);
    btn.backgroundColor  =[UIColor cyanColor];
    [btn  addTarget:self action:@selector(pressBtn) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:btn];
}

-(void)pressBtn{

    CardIOPaymentViewController *scanViewController = [[CardIOPaymentViewController alloc] initWithPaymentDelegate:self];
    scanViewController.modalPresentationStyle = UIModalPresentationFormSheet;
    [self presentViewController:scanViewController animated:YES completion:nil];

}
#pragma mark - CardIOPaymentViewControllerDelegate

- (void)userDidProvideCreditCardInfo:(CardIOCreditCardInfo *)info inPaymentViewController:(CardIOPaymentViewController *)paymentViewController {
    NSLog(@"Scan succeeded with info: %@", info);
    // Do whatever needs to be done to deliver the purchased items.
    [self dismissViewControllerAnimated:YES completion:nil];

    UILabel * label = [[UILabel alloc]init];
    label.frame = CGRectMake(100, 250, 100, 100);
    label.text = [NSString stringWithFormat:@"Received card info. Number: %@, expiry: %02lu/%lu, cvv: %@.", info.redactedCardNumber, (unsigned long)info.expiryMonth, (unsigned long)info.expiryYear, info.cvv];
}

- (void)userDidCancelPaymentViewController:(CardIOPaymentViewController *)paymentViewController {
    NSLog(@"User cancelled scan");
    [self dismissViewControllerAnimated:YES completion:nil];
}

-(void)viewWillAppear:(BOOL)animated{
    [CardIOUtilities preload];
}