二維碼SDK的Dome“QRCode”中製作libqrencode庫檔案，掃描ZBarSDK庫檔案
1.製作二維碼  /*字元轉二維碼
匯入 libqrencode檔案
新增  #import "QRCodeGenerator.h"
@property (strong , nonatomic) UIImageView* qRImageView;
- (void)viewDidLoad
{
    [super viewDidLoad];
    self.qRImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 400)];
     [self.view addSubview:self.qRImageView];
}

-(IBAction)qrBtnPress:(id)sender
{
    self.qRImageView.image = [QRCodeGenerator qrImageForString:@"二維碼儲存的字串資訊 asddsdd" imageSize:self.qRImageView.bounds.size.width];
}
2.讀取二維碼資訊

新增#import "ZBarSDK.h"//讀二維碼庫

@interface ViewController : UIViewController//讀二維碼的代
@property (strong , nonatomic) ZBarReaderViewController* reader;
@property (strong , nonatomic) NSString* qRUrl;

- (void)viewDidLoad
{
    [super viewDidLoad];
   
    self.qRUrl = [[NSString alloc] init];
    self.reader = [[ZBarReaderViewController alloc] init];
    self.reader.readerDelegate = self;
    self.reader.supportedOrientationsMask = ZBarOrientationMaskAll;
   
    ZBarImageScanner *scanner = self.reader.scanner;
   
    [scanner setSymbology: ZBAR_I25
                   config: ZBAR_CFG_ENABLE
                       to: 0];
    //這部分為zBarSDK文件提供的例子給出的主要的意思就是初始化ZBarReaderViewController類的物件，以及設定代理回撥方法為    - (void) imagePickerController: (UIImagePickerController*) reader
   //didFinishPickingMediaWithInfo: (NSDictionary*) info
 
    self.qRImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 400)];
   
    [self.view addSubview:self.qRImageView];
}


//點選Button時將掃描二維碼需要的照相機檢視，  self.reader是（ZBarReaderViewController）類的物件
-(IBAction)QRPress:(id)sender
{
    [self presentViewController:self.reader animated:YES completion:^{
        NSLog(@"fd");
    }];
}
//這個回撥方法的寫法是固定，只要知道以下幾點就好需要的資料是從symbol.data中取出的，因此也就需要在.h檔案中宣告一個字串接受就好。在這裡我在.h中聲明瞭self.qRUrl物件進行接受，之後只要按下面的格式寫就好。

- (void) imagePickerController: (UIImagePickerController*) reader
 didFinishPickingMediaWithInfo: (NSDictionary*) info
{
   
        id results =
        [info objectForKey: ZBarReaderControllerResults];
        ZBarSymbol *symbol = nil;
        for(symbol in results)
        {
            NSLog(@"symbol =%@",symbol.data);
            break;
        }
    self.qRUrl  = symbol.data;
    UIAlertView* alert = [[UIAlertView alloc] initWithTitle:self.qRUrl message:self.qRUrl delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
        self.qRImageView.image =
        [info objectForKey: UIImagePickerControllerOriginalImage];
       
    [self.reader dismissViewControllerAnimated:YES completion:^{
       
    }];

}