IOS之二维码的制作与扫描

原文地址：IOS之二维码的制作与扫描作者：love_ping891122

二维码SDK的Dome“QRCode”中制作libqrencode库文件，扫描ZBarSDK库文件
1.制作二维码  /*字符转二维码
导入 libqrencode文件
添加  #import "QRCodeGenerator.h"
@property (strong , nonatomic) UIImageView* qRImageView;
- (void)viewDidLoad
{
    [superviewDidLoad];
   self.qRImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0, 320, 400)];
    [self.view addSubview:self.qRImageView];
}

-(IBAction)qrBtnPress:(id)sender
{
   self.qRImageView.image = [QRCodeGeneratorqrImageForString:@"二维码存储的字符串信息 asddsdd"imageSize:self.qRImageView.bounds.size.width];
}
2.读取二维码信息

添加#import "ZBarSDK.h"//读二维码库

@interface ViewController : UIViewController//读二维码的代
@property (strong , nonatomic) ZBarReaderViewController*reader;
@property (strong , nonatomic) NSString* qRUrl;

- (void)viewDidLoad
{
    [superviewDidLoad];
   
    self.qRUrl =[[NSString alloc] init];
    self.reader= [[ZBarReaderViewController alloc] init];
   self.reader.readerDelegate = self;
   self.reader.supportedOrientationsMask =ZBarOrientationMaskAll;
   
   ZBarImageScanner *scanner = self.reader.scanner;
   
    [scannersetSymbology: ZBAR_I25
                  config: ZBAR_CFG_ENABLE
                      to: 0];
   //这部分为zBarSDK文档提供的例子给出的主要的意思就是初始化ZBarReaderViewController类的对象，以及设置代理回调方法为   - (void) imagePickerController: (UIImagePickerController*)reader
  //didFinishPickingMediaWithInfo: (NSDictionary*) info
 
   self.qRImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0, 320, 400)];
   
    [self.viewaddSubview:self.qRImageView];
}


//点击Button时将扫描二维码需要的照相机视图， self.reader是（ZBarReaderViewController）类的对象
-(IBAction)QRPress:(id)sender
{
    [selfpresentViewController:self.reader animated:YES completion:^{
       NSLog(@"fd");
    }];
}
//这个回调方法的写法是固定，只要知道以下几点就好需要的数据是从symbol.data中取出的，因此也就需要在.h文件中声明一个字符串接受就好。在这里我在.h中声明了self.qRUrl对象进行接受，之后只要按下面的格式写就好。

- (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.qRUrlmessage:self.qRUrl delegate:self cancelButtonTitle:@"OK"otherButtonTitles:nil];
    [alertshow];
       self.qRImageView.image =
       [info objectForKey: UIImagePickerControllerOriginalImage];
       
    [self.readerdismissViewControllerAnimated:YES completion:^{
       
    }];

}