Question

我正在为Iphone和Ipad开发QR码阅读器。我正在使用ZBar库来读取qr代码。但是当我专注于任何qr代码时，应用程序什么都不做。我正在使用文档部分中zbar站点上提供的代码。这是我的代码：

 ZBarReaderViewController *barReader = [ZBarReaderViewController new];
    barReader.readerDelegate = self;
    [barReader.scanner setSymbology:ZBAR_QRCODE config:ZBAR_CFG_ENABLE to:0];
    barReader.readerView.zoom = 1.0;
    barReader.showsCameraControls = NO;
    barReader.showsZBarControls = NO;
    barReader.wantsFullScreenLayout = NO;
    barReader.title = @"QRCode Reader";
    [self presentModalViewController:barReader animated:YES];

并在

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

功能我正在检索像这样的qrcode

AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
    ZBarSymbolSet *symbols = [info objectForKey:ZBarReaderControllerResults];
    ZBarSymbol *symb = nil;
    NSString *qrCode = nil;

    for(symb in symbols)
    {
        qrCode = [NSString stringWithString:symb.data];
    }

    NSLog(@"The results = %@",qrCode);

[self dismissModalViewControllerAnimated:YES];

Answer 1

为什么不使用ZBarReaderViewDelegate？

- (void)readerView:(ZBarReaderView *)view didReadSymbols:(ZBarSymbolSet *)syms fromImage:(UIImage *)img
{
    AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

    for (ZBarSymbol *sym in syms)
    {
        qrCode = [NSString sym.data];
    }

    NSLog(@"The results = %@",qrCode);
}

Answer 2

这段代码对我有用： .h文件

        ADD delegate protocol
        < ZBarReaderDelegate >

.m文件

用于扫描

    - (IBAction) scanButtonClick
    {

                ZBarReaderViewController *reader = [ZBarReaderViewController new];
                reader.readerDelegate = self;
                reader.supportedOrientationsMask = ZBarOrientationMaskAll;
                ZBarImageScanner *scanner = reader.scanner;
                // TODO: (optional) additional reader configuration here

                // EXAMPLE: disable rarely used I2/5 to improve performance
                [scanner setSymbology: ZBAR_I25
                       config: ZBAR_CFG_ENABLE
                           to: 0];

                // present and release the controller
                [self presentModalViewController: reader
                        animated: YES];
                [reader release];
    }

使用以下方式获取/检索：

    - (void) imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo: (NSDictionary*) info
    {
        // ADD: get the decode results
        id<NSFastEnumeration> results =
        [info objectForKey: ZBarReaderControllerResults];
        ZBarSymbol *symbol = nil;
        for(symbol in results)
            // EXAMPLE: just grab the first barcode
            break;

        // EXAMPLE: do something useful with the barcode data
        resultText.text = symbol.data;

        // EXAMPLE: do something useful with the barcode image
        resultImage.image =
        [info objectForKey: UIImagePickerControllerOriginalImage];

        // ADD: dismiss the controller (NB dismiss from the *reader*!)
        [reader dismissModalViewControllerAnimated: YES];
    }

Answer 3

默认情况下启用所有符号系统。你的代码

[barReader.scanner setSymbology:ZBAR_QRCODE config:ZBAR_CFG_ENABLE to:0];

将符号系统ZBAR_QRCODE的配置ZBAR_CFG_ENABLE设置为0 (false)。这意味着您实际上正在禁用QRCodes扫描。

disabling unused symbologies上的Zlib文档解释了：

例如，如果您只对QR码感兴趣，请禁用其他。执行此操作的有效方法是禁用所有符号系统和然后重新启用只有你想要的那些。这有助于隔离你遇到可能在未来版本中添加的新符号图书馆，直到你准备好处理它们：

// disables all symbologies
[scanner setSymbology: 0
         config: ZBAR_CFG_ENABLE
         to: 0];

// enables QRCode
[scanner setSymbology: ZBAR_QRCODE
         config: ZBAR_CFG_ENABLE
         to: 1];

Here是受支持的符号系统列表。

SAMIR RATHOD的回答是有效的，因为只有符号系统ZBAR_I25被禁用。

ZBar qrcode库不适用于IOS

3 个答案: