//
//  ViewController.m
//  QRCode
//
//  Created by chenchen on 15/7/30.
//  Copyright (c) 2015年 BSY. All rights reserved.
//
#import <AVFoundation/AVFoundation.h>
#import "ViewController.h"
@interface ViewController ()<AVCaptureMetadataOutputObjectsDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
   
    
    
    AVCaptureSession *session = [[AVCaptureSession alloc] init];
    AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    NSError *error = nil;
    
    AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device
                                                                        error:&error];
    if (input) {
        [session addInput:input];
    } else {
        NSLog(@"Error: %@", error);
    }
    AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutput alloc] init];
    //设置扫码支持的编码格式(如下设置条形码和二维码兼容)
    [output setMetadataObjectTypes:@[AVMetadataObjectTypeQRCode,AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode128Code]];
    [output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
    [session addOutput:output];
    [session startRunning];
}

#pragma mark - AVCaptureMetadataOutputObjectsDelegate
- (void)captureOutput:(AVCaptureOutput *)captureOutput
didOutputMetadataObjects:(NSArray *)metadataObjects
       fromConnection:(AVCaptureConnection *)connection
{
    NSString *QRCode = nil;
    for (AVMetadataObject *metadata in metadataObjects) {
        if ([metadata.type isEqualToString:AVMetadataObjectTypeQRCode]) {
            // This will never happen; nobody has ever scanned a QR code... ever
            QRCode = [(AVMetadataMachineReadableCodeObject *)metadata stringValue];
            break;
        }
    }
    
    NSLog(@"QR Code: %@", QRCode);
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end