ViewController.m

//
//  ViewController.m
//  ScienceHackDay
//
//  Created by Genki Sugimoto on 24/10/2015.
//  Copyright © 2015 Genki Sugimoto. All rights reserved.
//

#import "ViewController.h"

static const NSString *IP_ADDR = @"172.31.32.25";
static const NSString *PORT = @"4567";

@interface ViewController ()

@end

@implementation ViewController

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

- (void)viewDidAppear:(BOOL)animated {
    NSArray *types = @[AVMetadataObjectTypeQRCode];
    _reader        = [QRCodeReaderViewController readerWithMetadataObjectTypes:types];

    // Set the presentation style
    _reader.modalPresentationStyle = UIModalPresentationFormSheet;

    // Using delegate methods
    _reader.delegate = self;

    [self presentViewController:_reader animated:YES completion:NULL];
}

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

#pragma mark - QRCodeReader Delegate Methods

- (void)reader:(QRCodeReaderViewController *)reader didScanResult:(NSString *)result
{
    [self dismissViewControllerAnimated:YES completion:^{
        NSString *urlString = [NSString stringWithFormat:@"http://%@:%@/%@", IP_ADDR, PORT, result];
        NSURL *url = [NSURL URLWithString:urlString];
        NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
        NSURLResponse *response = nil;
        NSError *error = nil;
        NSData *data = [NSURLConnection sendSynchronousRequest:urlRequest
                                             returningResponse:&response
                                                         error:&error];
    }];
}

- (void)readerDidCancel:(QRCodeReaderViewController *)reader
{
    [self dismissViewControllerAnimated:YES completion:NULL];
}

@end