iOS讀取製作二維碼

iOS讀取製作二維碼

代碼例子下載地址 "讀取製作二維碼.zip"

http://vdisk.weibo.com/s/Gbaa1

工程中需要的第三方庫在代碼例子中有的

我們來看看.h文件：

#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

.m文件如下：

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.qRUrl = [[NSString alloc] init];
    //從這以下到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];
    //這部分爲zBarSDK文檔提供的例子給出的主要的意思就是初始化ZBarReaderViewController類的對象，以及設置代理回調方法爲- (void) imagePickerController: (UIImagePickerController*) reader
//didFinishPickingMediaWithInfo: (NSDictionary*) info
                                               
    self.qRImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 400)];
                                                 
    [self.view addSubview:self.qRImageView];
}

//製作二維碼
-(IBAction)qrBtnPress:(id)sender
{
    /*字符轉二維碼
     導入 libqrencode文件
     引入頭文件#import "QRCodeGenerator.h" 即可使用
     */
    self.qRImageView.image = [QRCodeGenerator qrImageForString:@"asd戶外" imageSize:self.qRImageView.bounds.size.width];
}

//點擊Button時將掃描二維碼需要的照相機視圖，即self.reader（ZBarReaderViewController）類的對象
-(IBAction)QRPress:(id)sender
{
    [self presentViewController:self.reader animated:YES completion:^{
        NSLog(@"fd");
    }];
}

//這個回調方法的寫法是固定，只要知道以下幾點就好需要的數據是從symbol.data中取出的，因此也就需要在.h文件中聲明一個字符串接受就好。在這裏我在.h中聲明瞭self.qRUrl對象進行接受，之後只要按下面的格式寫就好。
- (void) imagePickerController: (UIImagePickerController*) reader
 didFinishPickingMediaWithInfo: (NSDictionary*) info
{
                              
        id<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:^{
                                  
    }];
}