#import "LBXScanNative.h" @interface LBXScanNative() { BOOL bNeedScanResult; } @property (assign,nonatomic)AVCaptureDevice * device; @property (strong,nonatomic)AVCaptureDeviceInput * input; @property (strong,nonatomic)AVCaptureMetadataOutput * output; @property (strong,nonatomic)AVCaptureSession * session; @property (strong,nonatomic)AVCaptureVideoPreviewLayer * preview; @property(nonatomic,strong) AVCaptureStillImageOutput *stillImageOutput;//拍照 @property(nonatomic,assign)BOOL isNeedCaputureImage; //扫码结果 @property (nonatomic, strong) NSMutableArray *arrayResult; //扫码类型 @property (nonatomic, strong) NSArray* arrayBarCodeType; /** @brief 视频预览显示视图 */ @property (nonatomic,weak)UIView *videoPreView; /*! * 扫码结果返回 */ @property(nonatomic,copy)void (^blockScanResult)(NSArray *array); @end @implementation LBXScanNative - (void)setNeedCaptureImage:(BOOL)isNeedCaputureImg { _isNeedCaputureImage = isNeedCaputureImg; } + (CGFloat)getCameraVideoMaxScale { return 50.0; } - (id)initWithPreView:(UIView*)preView ObjectType:(NSArray*)objType cropRect:(CGRect)cropRect success:(void(^)(NSArray *array))block { if (self = [super init]) { [self initParaWithPreView:preView ObjectType:objType cropRect:cropRect success:block]; } return self; } - (void)initParaWithPreView:(UIView*)videoPreView ObjectType:(NSArray*)objType cropRect:(CGRect)cropRect success:(void(^)(NSArray *array))block { self.arrayBarCodeType = objType; self.blockScanResult = block; self.videoPreView = videoPreView; _device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; if (!_device) { return; } // Input _input = [AVCaptureDeviceInput deviceInputWithDevice:self.device error:nil]; if ( !_input ) return ; bNeedScanResult = YES; // Output _output = [[AVCaptureMetadataOutput alloc]init]; [_output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()]; if ( !CGRectEqualToRect(cropRect,CGRectZero) ) { _output.rectOfInterest = cropRect; } /* // Setup the still image file output */ _stillImageOutput = [[AVCaptureStillImageOutput alloc] init]; NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys: AVVideoCodecJPEG, AVVideoCodecKey, nil]; [_stillImageOutput setOutputSettings:outputSettings]; // Session _session = [[AVCaptureSession alloc]init]; [_session setSessionPreset:AVCaptureSessionPresetHigh]; // _session. // videoScaleAndCropFactor if ([_session canAddInput:_input]) { [_session addInput:_input]; } if ([_session canAddOutput:_output]) { [_session addOutput:_output]; } if ([_session canAddOutput:_stillImageOutput]) { [_session addOutput:_stillImageOutput]; } // 条码类型 AVMetadataObjectTypeQRCode // _output.metadataObjectTypes =@[AVMetadataObjectTypeQRCode]; if (!objType) { objType = [self defaultMetaDataObjectTypes]; } _output.metadataObjectTypes = objType; // Preview _preview =[AVCaptureVideoPreviewLayer layerWithSession:_session]; _preview.videoGravity = AVLayerVideoGravityResizeAspectFill; //_preview.frame =CGRectMake(20,110,280,280); CGRect frame = videoPreView.frame; frame.origin = CGPointZero; _preview.frame = frame; [videoPreView.layer insertSublayer:self.preview atIndex:0]; AVCaptureConnection *videoConnection = [self connectionWithMediaType:AVMediaTypeVideo fromConnections:[[self stillImageOutput] connections]]; // CGFloat maxScale = videoConnection.videoMaxScaleAndCropFactor; CGFloat scale = videoConnection.videoScaleAndCropFactor; NSLog(@"%f",scale); // CGFloat zoom = maxScale / 50; // if (zoom < 1.0f || zoom > maxScale) // { // return; // } // videoConnection.videoScaleAndCropFactor += zoom; // CGAffineTransform transform = videoPreView.transform; // videoPreView.transform = CGAffineTransformScale(transform, zoom, zoom); //先进行判断是否支持控制对焦,不开启自动对焦功能，很难识别二维码。 if (_device.isFocusPointOfInterestSupported &&[_device isFocusModeSupported:AVCaptureFocusModeAutoFocus]) { [_input.device lockForConfiguration:nil]; [_input.device setFocusMode:AVCaptureFocusModeContinuousAutoFocus]; [_input.device unlockForConfiguration]; } } - (CGFloat)getVideoMaxScale { [_input.device lockForConfiguration:nil]; AVCaptureConnection *videoConnection = [self connectionWithMediaType:AVMediaTypeVideo fromConnections:[[self stillImageOutput] connections]]; CGFloat maxScale = videoConnection.videoMaxScaleAndCropFactor; [_input.device unlockForConfiguration]; return maxScale; } - (void)setVideoScale:(CGFloat)scale { [_input.device lockForConfiguration:nil]; AVCaptureConnection *videoConnection = [self connectionWithMediaType:AVMediaTypeVideo fromConnections:[[self stillImageOutput] connections]]; CGFloat zoom = scale / videoConnection.videoScaleAndCropFactor; videoConnection.videoScaleAndCropFactor = scale; [_input.device unlockForConfiguration]; CGAffineTransform transform = _videoPreView.transform; _videoPreView.transform = CGAffineTransformScale(transform, zoom, zoom); } - (void)setScanRect:(CGRect)scanRect { //识别区域设置 if (_output) { _output.rectOfInterest = [self.preview metadataOutputRectOfInterestForRect:scanRect]; } } - (void)changeScanType:(NSArray*)objType { _output.metadataObjectTypes = objType; } - (void)startScan { if ( _input && !_session.isRunning ) { [_session startRunning]; bNeedScanResult = YES; [_videoPreView.layer insertSublayer:self.preview atIndex:0]; // [_input.device addObserver:self forKeyPath:@"torchMode" options:0 context:nil]; } bNeedScanResult = YES; } - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { if ( object == _input.device ) { NSLog(@"flash change"); } } - (void)stopScan { bNeedScanResult = NO; if ( _input && _session.isRunning ) { bNeedScanResult = NO; [_session stopRunning]; // [self.preview removeFromSuperlayer]; } } - (void)setTorch:(BOOL)torch { [self.input.device lockForConfiguration:nil]; self.input.device.torchMode = torch ? AVCaptureTorchModeOn : AVCaptureTorchModeOff; [self.input.device unlockForConfiguration]; } - (void)changeTorch { AVCaptureTorchMode torch = self.input.device.torchMode; switch (_input.device.torchMode) { case AVCaptureTorchModeAuto: break; case AVCaptureTorchModeOff: torch = AVCaptureTorchModeOn; break; case AVCaptureTorchModeOn: torch = AVCaptureTorchModeOff; break; default: break; } [_input.device lockForConfiguration:nil]; _input.device.torchMode = torch; [_input.device unlockForConfiguration]; } -(UIImage *)getImageFromLayer:(CALayer *)layer size:(CGSize)size { UIGraphicsBeginImageContextWithOptions(size, YES, [[UIScreen mainScreen]scale]); [layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return image; } - (AVCaptureConnection *)connectionWithMediaType:(NSString *)mediaType fromConnections:(NSArray *)connections { for ( AVCaptureConnection *connection in connections ) { for ( AVCaptureInputPort *port in [connection inputPorts] ) { if ( [[port mediaType] isEqual:mediaType] ) { return connection; } } } return nil; } - (void)captureImage { AVCaptureConnection *stillImageConnection = [self connectionWithMediaType:AVMediaTypeVideo fromConnections:[[self stillImageOutput] connections]]; [[self stillImageOutput] captureStillImageAsynchronouslyFromConnection:stillImageConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) { [self stopScan]; if (imageDataSampleBuffer) { NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer]; UIImage *img = [UIImage imageWithData:imageData]; for (LBXScanResult* result in _arrayResult) { result.imgScanned = img; } } if (_blockScanResult) { _blockScanResult(_arrayResult); } }]; } #pragma mark AVCaptureMetadataOutputObjectsDelegate - (void)captureOutput2:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection { //识别扫码类型 for(AVMetadataObject *current in metadataObjects) { if ([current isKindOfClass:[AVMetadataMachineReadableCodeObject class]] ) { NSString *scannedResult = [(AVMetadataMachineReadableCodeObject *) current stringValue]; NSLog(@"type:%@",current.type); NSLog(@"result:%@",scannedResult); //测试可以同时识别多个二维码 } } } - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection { if (!bNeedScanResult) { return; } bNeedScanResult = NO; if (!_arrayResult) { self.arrayResult = [NSMutableArray arrayWithCapacity:1]; } else { [_arrayResult removeAllObjects]; } //识别扫码类型 for(AVMetadataObject *current in metadataObjects) { if ([current isKindOfClass:[AVMetadataMachineReadableCodeObject class]] ) { bNeedScanResult = NO; NSLog(@"type:%@",current.type); NSString *scannedResult = [(AVMetadataMachineReadableCodeObject *) current stringValue]; if (scannedResult && ![scannedResult isEqualToString:@""]) { LBXScanResult *result = [LBXScanResult new]; result.strScanned = scannedResult; result.strBarCodeType = current.type; [_arrayResult addObject:result]; } //测试可以同时识别多个二维码 } } if (_arrayResult.count < 1) { bNeedScanResult = YES; return; } if (_isNeedCaputureImage) { [self captureImage]; } else { [self stopScan]; if (_blockScanResult) { _blockScanResult(_arrayResult); } } } /** @brief 默认支持码的类别 @return 支持类别 数组 */ - (NSArray *)defaultMetaDataObjectTypes { NSMutableArray *types = [@[AVMetadataObjectTypeQRCode, AVMetadataObjectTypeUPCECode, AVMetadataObjectTypeCode39Code, AVMetadataObjectTypeCode39Mod43Code, AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode93Code, AVMetadataObjectTypeCode128Code, AVMetadataObjectTypePDF417Code, AVMetadataObjectTypeAztecCode] mutableCopy]; if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber_iOS_7_1) { [types addObjectsFromArray:@[ AVMetadataObjectTypeInterleaved2of5Code, AVMetadataObjectTypeITF14Code, AVMetadataObjectTypeDataMatrixCode ]]; } return types; } @end