WJBarCodeScanner

If you only want to scan a barCode without dig into AVFoundtion,this is a good tool for you.
The WJBarCodeScanner keeps the scan process as simple as possible,and give you as much flexible as possible.

#ScreenShot

QuickExample

1.Create a subclass of WJScanViewController.
2.Configure transparentArea,scanColor,metadataObjectTypes .
3.Override func captureOutput(captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [AnyObject]!, fromConnection connection: AVCaptureConnection!) to get the result of scanning.
4.Override func handleCameraWithoutAuth() to handle cases when there is no camera available.
5.Use proterties （session output） to do more specific staff.

import UIKit
import AVFoundation

class ViewController: WJScanViewController{
    @IBOutlet weak var messageLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()
        transparentArea = CGRect(x: view.center.x-150, y: 0, width: 300, height: 400)
        scanColor = UIColor.cyanColor()
        metadataObjectTypes = [ AVMetadataObjectTypeQRCode]  // IF YOU only want to scan QRCode
    }

    override func captureOutput(captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [AnyObject]!, fromConnection connection: AVCaptureConnection!) {
        if  let metadataObject = metadataObjects.first {
            let stringValue = (metadataObject as! AVMetadataMachineReadableCodeObject).stringValue
            print(stringValue)
            messageLabel.text = stringValue
            session.stopRunning()
        }
    }
    
    override func handleCameraWithoutAuth() {
        let alertView = UIAlertController(title: "alert", message: "Cannot use Back Camera", preferredStyle: .Alert)
        alertView.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil ))
        presentViewController(alertView, animated: true , completion: nil)
    }
}

how to install

1 manual

step1: Drop WJBarCodeScanner folder into your project.

step2: Create a subclass of WJScanViewController.

import UIKit
import AVFoundation

class ViewController: WJScanViewController{
}

2 cocoapods

step1:add the following line to your Podfile:

platform :ios, '8.0'
use_frameworks!
pod 'WJBarCodeScanner'

step2:import WJBarCodeScanner

import WJBarCodeScanner