iphone - 矩形在 ZBar 扫描仪中带上相机？

Question

我们如何将矩形带在相机上进行条码扫描，就像带有扫描声的红色激光一样？是否有任何内置属性？我尝试了以下操作:

 reader.readerView.tracksSymbols = YES;
reader.readerView.trackingColor = [UIColor redColor];

[reader setShowsZBarControls:NO];
reader.readerView.tracksSymbols = TRUE;
scanner.accessibilityFrame = CGRectMake(100, 100, 200, 300);

Answer 1

将矩形添加为相机 View 上的叠加层。代码如下:

- (IBAction) scanButtonTapped
    {
        // ADD: present a barcode reader that scans from the camera feed
        ZBarReaderViewController *reader = [ZBarReaderViewController new];
        reader.readerDelegate = self;
        reader.supportedOrientationsMask = ZBarOrientationMaskAll;

        ZBarImageScanner *scanner = reader.scanner;
        reader.showsZBarControls = NO;

        [scanner setSymbology: ZBAR_I25
                       config: ZBAR_CFG_ENABLE
                           to: 0];
        // present and release the controller
        [self presentModalViewController: reader
                                animated: YES];
        reader.cameraOverlayView = [self CommomOverlay];
        [reader release];
    }


-(UIView*)CommomOverlay{  
        UIView* view = [[UIView alloc] initWithFrame:CGRectMake(0,0,320,480)];
       UIImageView *FrameImg = [[UIImageView alloc] initWithFrame:CGRectMake(70,160,203,180)];
        [FrameImg setImage:[UIImage imageNamed:@"overlaygraphic.png"]];
       [view addSubview:FrameImg];
        return view;
    }

希望这对你有帮助..:)