barcode postion detect

LBXScan/LBXNative/LBXScanNative.h

@@ -23,6 +23,9 @@
 @interface LBXScanNative : NSObject
 
 
+/// 是否需要条码位置信息,默认NO,位置信息在LBXScanResult中返回
+@property (nonatomic, assign) BOOL needCodePosion;
+
 #pragma mark --初始化
 /**
  @brief 初始化采集相机

LBXScan/LBXNative/LBXScanNative.m

@@ -110,6 +110,7 @@ - (void)initParaWithPreView:(UIView*)videoPreView
  success:(void(^)(NSArray<LBXScanResult*> *array))success
 {
 
+ self.needCodePosion = NO;
  self.blockvideoMaxScale = blockvideoMaxScale;
 
  self.arrayBarCodeType = objType;
@@ -155,9 +156,7 @@ - (void)initParaWithPreView:(UIView*)videoPreView
  _session = [[AVCaptureSession alloc]init];
  [_session setSessionPreset:AVCaptureSessionPresetHigh];
 
- // _session.
-
- // videoScaleAndCropFactor
+// [_session setSessionPreset:AVCaptureSessionPreset1280x720];
 
  if ([_session canAddInput:_input])
  {
@@ -174,9 +173,6 @@ - (void)initParaWithPreView:(UIView*)videoPreView
  [_session addOutput:_stillImageOutput];
  }
 
-
-
-
  // 条码类型 AVMetadataObjectTypeQRCode
  // _output.metadataObjectTypes =@[AVMetadataObjectTypeQRCode];
 
@@ -190,12 +186,15 @@ - (void)initParaWithPreView:(UIView*)videoPreView
  _preview =[AVCaptureVideoPreviewLayer layerWithSession:_session];
  _preview.videoGravity = AVLayerVideoGravityResizeAspectFill;
 
+// _preview
+
  //_preview.frame =CGRectMake(20,110,280,280);
 
  CGRect frame = videoPreView.frame;
  frame.origin = CGPointZero;
  _preview.frame = frame;
 
+
  [videoPreView.layer insertSublayer:self.preview atIndex:0];
 
 
@@ -208,19 +207,8 @@ - (void)initParaWithPreView:(UIView*)videoPreView
 
  _blockvideoMaxScale(maxScale);
  }
-
-
-// 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])
  {
@@ -315,8 +303,6 @@ - (void)stopScan
  {
  bNeedScanResult = NO;
  [_session stopRunning];
-
- // [self.preview removeFromSuperlayer];
  }
 }
 
@@ -447,6 +433,12 @@ - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:
  [_arrayResult removeAllObjects];
  }
 
+ if (_needCodePosion) {
+ [self stopScan];
+ }
+
+ metadataObjects = [self transformedCodesFromCodes:metadataObjects];
+
  //识别扫码类型
  for(AVMetadataObject *current in metadataObjects)
  {
@@ -458,61 +450,17 @@ - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:
  NSString *scannedResult = [(AVMetadataMachineReadableCodeObject *) current stringValue];
 
  NSArray<NSDictionary *> *corners = ((AVMetadataMachineReadableCodeObject *) current).corners;
-
- NSLog(@"corners:%@",corners);
-
- CGFloat totalX = 0;
- CGFloat totalY = 0;
- for (NSDictionary* dic in corners) {
-
- NSNumber *numX = dic[@"X"];
- NSNumber *numY = dic[@"Y"];
-
- totalX += numX.floatValue;
- totalY += numY.floatValue;
- }
-
- NSLog(@"aver X:%f Y:%f",totalX / corners.count,totalY / corners.count);
-
-
- dispatch_async(dispatch_get_main_queue(), ^{
- // 更新界面
- [self videoNearCode:totalX / corners.count averY:totalY / corners.count];
- });
-
-
- [self stopScan];
-
- // CGFloat y = 0;
- // y = y + zoom > 1 ? zoom : -zoom;
- // //移动
- // _videoPreView.transform = CGAffineTransformTranslate(_videoPreView.transform, 0, y);
-
- //y从下往上
-// (
-// {
-// X = "0.3534338575269208";
-// Y = "0.7310508255651641";
-// },
-// {
-// X = "0.4657595844499312";
-// Y = "0.7077938333219527";
-// },
-// {
-// X = "0.4562285844779192";
-// Y = "0.509763749366999";
-// },
-// {
-// X = "0.343985141844123";
-// Y = "0.5347846218594517";
-// }
-// )
+ CGRect bounds = ((AVMetadataMachineReadableCodeObject *) current).bounds;
+
+ NSLog(@"corners:%@ bounds:%@",corners,NSStringFromCGRect( bounds ));
 
  if (scannedResult && ![scannedResult isEqualToString:@""])
  {
  LBXScanResult *result = [LBXScanResult new];
  result.strScanned = scannedResult;
  result.strBarCodeType = current.type;
+ result.corners = corners;
+ result.bounds = bounds;
 
  [_arrayResult addObject:result];
  }
@@ -523,13 +471,11 @@ - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:
  if (_arrayResult.count < 1)
  {
  bNeedScanResult = YES;
+ [self startScan];
  return;
  }
 
-
- return;
-
- if (_isNeedCaputureImage)
+ if (!_needCodePosion && _isNeedCaputureImage)
  {
  [self captureImage];
  }
@@ -543,8 +489,67 @@ - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:
  }
 }
 
-- (void)videoNearCode:(CGFloat)averX averY:(CGFloat)averY
+
+
+- (NSArray *)transformedCodesFromCodes:(NSArray *)codes {
+ NSMutableArray *transformedCodes = [NSMutableArray array];
+ [codes enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
+ AVMetadataObject *transformedCode = [self.preview transformedMetadataObjectForMetadataObject:obj];
+ [transformedCodes addObject:transformedCode];
+ }];
+ return [transformedCodes copy];
+}
+
+- (CGPoint)pointForCorner:(NSDictionary *)corner {
+ CGPoint point;
+ CGPointMakeWithDictionaryRepresentation((CFDictionaryRef)corner, &point);
+ return point;
+}
+- (void)handCorners:(NSArray<NSDictionary *> *)corners bounds:(CGRect)bounds
+{
+ CGFloat totalX = 0;
+ CGFloat totalY = 0;
+
+ for (NSDictionary *dic in corners) {
+ CGPoint pt = [self pointForCorner:dic];
+ NSLog(@"pt:%@",NSStringFromCGPoint(pt));
+ totalX += pt.x;
+ totalY += pt.y;
+ }
+
+ CGFloat averX = totalX / corners.count;
+ CGFloat averY = totalY / corners.count;
+
+
+
+ CGFloat minSize = MIN(bounds.size.width , bounds.size.height);
+
+ NSLog(@"averx:%f,avery:%f minsize:%f",averX,averY,minSize);
+
+ dispatch_async(dispatch_get_main_queue(), ^{
+
+ [self signCodeWithCenterX:averX centerY:averY];
+
+ });
+}
+
+- (void)signCodeWithCenterX:(CGFloat)centerX centerY:(CGFloat)centerY
+{
+ UIView *signView = [[UIView alloc]initWithFrame:CGRectMake(centerX-10, centerY-10, 20, 20)];
+
+ [self.videoPreView addSubview:signView];
+ signView.backgroundColor = [UIColor redColor];
+
+}
+
+
+/// 条码可以放到到指定位置 （条码在边缘位置，放大及平移后，导致边缘是黑色
+/// @param averX averX descriptio
+/// @param averY averY description
+/// @param bounds bounds description
+- (void)videoNearCode:(CGFloat)averX averY:(CGFloat)averY bounds:(CGRect)bounds
 {
+ CGFloat minSize = MIN(bounds.size.width , bounds.size.height);
  // CGFloat y = 0;
  // y = y + zoom > 1 ? zoom : -zoom;
  // //移动
@@ -556,70 +561,47 @@ - (void)videoNearCode:(CGFloat)averX averY:(CGFloat)averY
  CGFloat centerX = width / 2;
  CGFloat centerY = height / 2;
 
- CGFloat diffX = centerX - averX * width;
- CGFloat diffY = centerY - averY * height;
+ CGFloat diffX = centerX  - averX;
+ CGFloat diffY = centerY - averY;
 
  //计算二维码尺寸，然后计算放大比例
- CGFloat scale = 1.2;
-
-// diffX = diffX /scale;
- diffY = diffY /scale;
-
- NSLog(@"diffX:%f,diffY:%f",diffX,diffY);
+ CGFloat scale = 100 / minSize * 1.1;
 
 
-// self.videoPreView.layer.anchorPoint = CGPointMake(width * averX, height * averY);
-
-
-
-
-// [_input.device lockForConfiguration:nil];
-//
-//
-// AVCaptureConnection *videoConnection = [self connectionWithMediaType:AVMediaTypeVideo fromConnections:[[self stillImageOutput] connections]];
-//
-//
-// if (scale < 1 || scale > videoConnection.videoMaxScaleAndCropFactor ) {
-// return;
-// }
-//
-// CGFloat zoom = scale / videoConnection.videoScaleAndCropFactor;
-// // NSLog(@"max :%f",videoConnection.videoMaxScaleAndCropFactor);
-//
-//
-// videoConnection.videoScaleAndCropFactor = scale;
-//
-// [_input.device unlockForConfiguration];
-//
-//
-// self.videoPreView.layer.anchorPoint = CGPointMake(0.0f, 0.0f);
-//
-// CGAffineTransform transform = _videoPreView.transform;
-//
-// [UIView animateWithDuration:0.3 animations:^{
-//
-// self.videoPreView.transform = CGAffineTransformScale(transform, zoom, zoom);
-// }];
-
-
-
-
-// [UIView animateWithDuration:0.3 animations:^{
-//
-//
-// self.videoPreView.transform = CGAffineTransformMakeTranslation(diffX, diffY);
-// }];
+ NSLog(@"diffX:%f,diffY:%f,scale:%f",diffX,diffY,scale);
 
+ diffX = diffX / MAX(1, scale * 0.8);
+ diffY = diffY / MAX(1, scale * 0.8);
 
- [UIView animateWithDuration:0.3 animations:^{
-
-
- self.videoPreView.transform = CGAffineTransformTranslate(self.videoPreView.transform,diffX , 0);
- }];
-//
-
-
-
+ if (scale > 1) {
+
+ [_input.device lockForConfiguration:nil];
+
+ AVCaptureConnection *videoConnection = [self connectionWithMediaType:AVMediaTypeVideo fromConnections:[[self stillImageOutput] connections]];
+
+
+ if (scale < 1 || scale > videoConnection.videoMaxScaleAndCropFactor ) {
+ return;
+ }
+
+ CGFloat zoom = scale / videoConnection.videoScaleAndCropFactor;
+
+ videoConnection.videoScaleAndCropFactor = scale;
+
+ [_input.device unlockForConfiguration];
+
+ CGAffineTransform transform = _videoPreView.transform;
+
+ [UIView animateWithDuration:0.3 animations:^{
+
+ self.videoPreView.transform = CGAffineTransformScale(transform, zoom, zoom);
+ }];
+
+ [UIView animateWithDuration:0.3 animations:^{
+
+ self.videoPreView.transform = CGAffineTransformTranslate(self.videoPreView.transform,diffX , diffY);
+ }];
+ }
 }
 
 

LBXScan/LBXScanTypes.h

@@ -32,5 +32,11 @@
  */
 @property (nonatomic, copy) NSString* strBarCodeType;
 
+//条码4个角
+@property (nonatomic, copy) NSArray<NSDictionary *> *corners;
+
+//没有corners精确
+@property (nonatomic, assign) CGRect bounds;
+
 @end
 

LBXScan/LBXScanTypes.m

@@ -12,6 +12,7 @@ - (instancetype)initWithScanString:(NSString*)str imgScan:(UIImage*)img barCodeT
  self.strScanned = str;
  self.imgScanned = img;
  self.strBarCodeType = type;
+ self.bounds = CGRectZero;
  }
 
  return self;