iOS读取制作二维码

#import <UIKit/UIKit.h>
#import "ZBarSDK.h"
@interface ViewController : UIViewController<ZBarReaderDelegate,UIAlertViewDelegate>
@property (strong , nonatomic) UIImageView* qRImageView;
@property (strong , nonatomic) ZBarReaderViewController* reader;
@property (strong , nonatomic) NSString* qRUrl;
-(IBAction)QRPress:(id)sender;
-(IBAction)qrBtnPress:(id)sender;
@end

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.qRUrl = [[NSString alloc] init];
//从这以下到32行
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];
//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.view addSubview:self.qRImageView];
}

//制作二维码
-(IBAction)qrBtnPress:(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
*/
self.qRImageView.image = [QRCodeGenerator qrImageForString:@"asd户外" imageSize:self.qRImageView.bounds.size.width];
}

//点击Button时将扫描二维码需要的照相机视图，即self.reader（ZBarReaderViewController）类的对象
-(IBAction)QRPress:(id)sender
{
[self presentViewController: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<NSFastEnumeration> 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:^{

}];
}