Question

尝试使用ZBar捕获条形码。我现在有以下代码。当代码周围出现绿色覆盖时，扫描仪显示并显示扫描条形码。我不知道如何捕获解码结果。

我可能会犯错，所以我想问一下。扫描时没有任何内容输出到控制台，所以不要认为根本没有调用didReadSymbols。

·H

@interface ScannerViewController : UIViewController <ZBarReaderDelegate> {
}

@property (strong, nonatomic) IBOutlet UILabel *readerResult;
@property (strong, nonatomic) IBOutlet UIView *readerView;
@property (strong, nonatomic) IBOutlet ZBarReaderView *zbr;

的.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    // force class to load so it may be referenced directly from nib
    [ZBarReaderViewController class];

    ZBarReaderViewController *reader= [ZBarReaderViewController new];
    reader.readerDelegate = self;

    ZBarImageScanner *scanner = reader.scanner;
    //reader.cameraOverlayView = self.readerView;
    [scanner setSymbology: 0
                          config: ZBAR_CFG_ENABLE
                              to: 1];
    [reader setShowsZBarControls:NO];
    [reader.readerView start];
    self.zbr = reader.readerView;
    [self.view addSubview:reader.view];

}

- (void) zbr: (ZBarReaderView*) view
     didReadSymbols: (ZBarSymbolSet*) syms
          fromImage: (UIImage*) img
{
    NSLog(@"Scanner used");
    //do something useful with results and display resultText in resultViewController
    for(ZBarSymbol *sym in syms) {
        NSLog(@"Logged");
        //return resultText;
        break;
    }
}

任何建议都会很棒。我此刻对此非常困惑。干杯。

Answer 1

当我查看ZBar的文档时，I see the delegate method signature is：

- (void) readerView:(ZBarReaderView*)readerView didReadSymbols:(ZBarSymbolSet*)symbols fromImage:(UIImage*)image

这与上面的内容不同。将“zbr”替换为“readerView”，您的委托方法应该被调用。

Answer 2

我将以下内容添加到ScannerViewController界面。

ZBarReaderViewController *reader;

然后我更改了下面的readerView方法，它完美无缺。

- (void) imagePickerController: (UIImagePickerController*) reader
 didFinishPickingMediaWithInfo: (NSDictionary*) info
{
    id<NSFastEnumeration> results =
    [info objectForKey: ZBarReaderControllerResults];
    UIImage *image =
    [info objectForKey: UIImagePickerControllerOriginalImage];
    NSString *resultText = [[NSString alloc] init];
    for(ZBarSymbol *sym in results) {

        NSLog(@"%@", sym.data);
        resultText = sym.data;
        //return resultText;
        break;
    }
}

使用ZBar扫描和捕获条形码

2 个答案: