iphone - iPhone 二维码阅读器

Question

所以我需要为 iphone 应用程序编写一个 QR 阅读器。通常像 ZXING 和 ZBAr 这样的框架允许你下载一个应用程序然后读取条形码。我想将它集成到应用程序本身中。所以基本上我希望能够点击一个按钮并让它读取二维码。这可能吗？如果是这样，是否有任何适当的文件？我尝试使用 ZXing，但是当我链接二进制文件时，libZXingWidget.a 不可用。此外，文档不足以了解如何将其集成到应用程序中。所以让我知道。

Answer 1

这是设置 ZBar 的代码，确保将 SDK 添加到您的项目并链接您的库。

-

(void)viewDidLoad
{
        [ZBarReaderView class];
        readerView.readerDelegate = self;
        readerView.tracksSymbols = NO;

            //CHOOSE CAMERA
            if (some setting isEqual to CameraRear) {
                readerView.device = [self backFacingCameraIfAvailable];
            }
            else {
                readerView.device = [self frontFacingCameraIfAvailable];
            }

        [self relocateReaderPopover:[self interfaceOrientation]];
        [readerView start];
    }

-(AVCaptureDevice *)frontFacingCameraIfAvailable
{
    NSArray *videoDevices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
    AVCaptureDevice *captureDevice = nil;
    for (AVCaptureDevice *device in videoDevices)
    {
        if (device.position == AVCaptureDevicePositionFront)
        {
            captureDevice = device;
            break;
        }
    }

    //  couldn't find one on the front, so just get the default video device.
    if ( ! captureDevice)
    {
        captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    }

    return captureDevice;
}

-(AVCaptureDevice *)backFacingCameraIfAvailable
{
    NSArray *videoDevices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
    AVCaptureDevice *captureDevice = nil;
    for (AVCaptureDevice *device in videoDevices)
    {
        if (device.position == AVCaptureDevicePositionBack)
        {
            captureDevice = device;
            break;
        }
    }

    //  couldn't find one on the front, so just get the default video device.
    if ( ! captureDevice)
    {
        captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
    }

    return captureDevice;
}

-(void)relocateReaderPopover:(UIInterfaceOrientation)toInterfaceOrientation{
    if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft) {
        readerView.previewTransform = CGAffineTransformMakeRotation(M_PI_2);
    } else if (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {
        readerView.previewTransform = CGAffineTransformMakeRotation(-M_PI_2);
    } else if (toInterfaceOrientation== UIInterfaceOrientationPortraitUpsideDown) {
        readerView.previewTransform = CGAffineTransformMakeRotation(M_PI);
    } else {
        readerView.previewTransform = CGAffineTransformIdentity;
    }
}