http://zbar.sourceforge.net/iphone/index.html

#import "ZBarSDK.h"
#import "QRCodeGenerator.h"


@interface yxpViewController ()<ZBarReaderDelegate,UIAlertViewDelegate >

@end

@implementation yxpViewController

@synthesize imageview;
@synthesize text;
@synthesize label;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [text resignFirstResponder];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.title=@"二维码编辑器";
}

//扫描二维码
- (IBAction)button:(id)sender {
    /*扫描二维码部分：
     导入ZBarSDK文件并引入一下框架
     AVFoundation.framework
     CoreMedia.framework
     CoreVideo.framework
     QuartzCore.framework
     libiconv.dylib
     引入头文件#import “ZBarSDK.h” 即可使用
     当找到条形码时，会执行代理方法
     
     - (void) imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo: (NSDictionary*) info
     
     最后读取并显示了条形码的图片和内容。*/
    
    ZBarReaderViewController *reader = [ZBarReaderViewController new];
    reader.readerDelegate = self;
    reader.supportedOrientationsMask = ZBarOrientationMaskAll;
    
    ZBarImageScanner *scanner = reader.scanner;
    
    [scanner setSymbology: ZBAR_I25
                   config: ZBAR_CFG_ENABLE
                       to: 0];
    
    //[self presentModalViewController: reader animated: YES];
    [self presentViewController:reader animated:YES completion:nil];
}

- (IBAction)button2:(id)sender {
    /*字符转二维码
     导入 libqrencode文件
     引入头文件#import "QRCodeGenerator.h" 即可使用
     */
	imageview.image = [QRCodeGenerator qrImageForString:text.text imageSize:imageview.bounds.size.width];
    
}

- (IBAction)Responder:(id)sender {
    //键盘释放
    [text resignFirstResponder];
    
}

//保存照片到本地
- (IBAction)saveImage:(id)sender {
    
    if(imageview.image!=nil)
    {
        UIImage *aImage = imageview.image;
        UIImageWriteToSavedPhotosAlbum(aImage, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
        
    }
}

- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
    
    if (error != NULL) {
        UIAlertView *photoSave = [[UIAlertView alloc] initWithTitle:@"保存出错" message:[NSString stringWithFormat:@"%@",error] delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];
        [photoSave show];
        photoSave = nil;
    }else {
        UIAlertView *photoSave = [[UIAlertView alloc] initWithTitle:@"保存成功" message:nil delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];
        [photoSave show];
        //程序自动完成点击buttonIndex的button 并dismiss 整个alertView的操作
        [photoSave dismissWithClickedButtonIndex:0 animated:YES];
        photoSave = nil;
    }
}

- (void)imagePickerController: (UIImagePickerController*) reader
 didFinishPickingMediaWithInfo: (NSDictionary*) info
{
    id<NSFastEnumeration> results =
    [info objectForKey: ZBarReaderControllerResults];
    ZBarSymbol *symbol = nil;
    for(symbol in results)
        break;
    
    imageview.image =
    [info objectForKey: UIImagePickerControllerOriginalImage];
    
    //[reader dismissModalViewControllerAnimated: YES];
    [reader dismissViewControllerAnimated:YES completion:nil];
    
    //判断是否包含 头'http:'
    NSString *regex = @"http+:[^\\s]*";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
    
    //判断是否包含 头'ssid:'
    NSString *ssid = @"ssid+:[^\\s]*";;
    NSPredicate *ssidPre = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",ssid];
    
    label.text =  symbol.data ;
    
    if ([predicate evaluateWithObject:label.text]) {
        
        UIAlertView * alert = [[UIAlertView alloc]initWithTitle:nil
                                                        message:@"It will use the browser to this URL。"
                                                       delegate:nil
                                              cancelButtonTitle:@"Close"
                                              otherButtonTitles:@"Ok", nil];
        alert.delegate = self;
        alert.tag=1;
        [alert show];
    }
    else if([ssidPre evaluateWithObject:label.text]){
        
        NSArray *arr = [label.text componentsSeparatedByString:@";"];
        
        NSArray * arrInfoHead = [[arr objectAtIndex:0] componentsSeparatedByString:@":"];
        
        NSArray * arrInfoFoot = [[arr objectAtIndex:1] componentsSeparatedByString:@":"];
        
        
        label.text=
        [NSString stringWithFormat:@"ssid: %@ \n password:%@",
         [arrInfoHead objectAtIndex:1],[arrInfoFoot objectAtIndex:1]];
        
        
        UIAlertView * alert = [[UIAlertView alloc]initWithTitle:label.text
                                                        message:@"The password is copied to the clipboard , it will be redirected to the network settings interface"
                                                       delegate:nil
                                              cancelButtonTitle:@"Close"
                                              otherButtonTitles:@"Ok", nil];
        
        
        alert.delegate = self;
        alert.tag=2;
        [alert show];
        
        UIPasteboard *pasteboard=[UIPasteboard generalPasteboard];
        //        然后，可以使用如下代码来把一个字符串放置到剪贴板上：
        pasteboard.string = [arrInfoFoot objectAtIndex:1];
    }
}

4、编译运行

lipo  -create  原libzbar.a目录  -o  新生成libzbar.a目录