Use ZBar in iOS to scan the QR code and customize the scan interface

Use ZBar in iOS to scan the QR code and customize the scan interface
ZXing has been used in Android to identify QR codes. ZXing also has the corresponding iOS version. After understanding it, ZBar is also a common QR code recognition software, the sdks for iOS and Android are provided for use. Finally, I chose ZBar for QR code identification. The annotations are clear and easy to use.

ZBar provides two usage methods. One is to directly call ZBarReaderViewController provided by ZBar to open a scanning interface, another method is to use ZBarReaderView provided by ZBar that can be embedded in other views. In actual projects, we are more likely to use the second method, this allows us to customize more interfaces.

ZBar is also very simple to use. Import ZBarSDK to the project and import the ZBarSDK. h header file to the file that requires ZBar.

# Pragma mark initialization scan-(void) InitScan {readview = [ZBarReaderView new]; readview. backgroundColor = [UIColor clearColor]; readview. frame = CGRectMake (0, 0, self. view. frame. size. width, self. view. frame. size. height); readview. readerDelegate = self; readview. allowsPinchZoom = YES; // use gesture zoom readview. trackingColor = [UIColor redColor]; readview. showsFPS = NO; // display frame rate YES show NO not show // readview. scanCrop = CGRectMake (0, 0, 1, 1); // UIImage * hbImage = [UIImage imageNamed: @ "pick_bg.png"]; scanZomeBack = [[UIImageView alloc] initWithImage: hbImage]; // Add a background image CGRect mImagerect = CGRectMake (readview. frame. size. width-200)/2.0, (readview. frame. size. height-200)/2.0, 200,200); [scanZomeBack setFrame: mImagerect]; readview. scanCrop = [self getScanCrop: mImagerect readerViewBounds: readview. bounds]; // The region of the image to be scanned [readview addSubview: scanZomeBack]; [readview addSubview: readLineView]; [self. view addSubview: readview]; [readview start];}

# Pragma mark obtain the scan area-(CGRect) getScanCrop :( CGRect) rect readerViewBounds :( CGRect) readerViewBounds {CGFloat x, y, width, height; x = rect. origin. x/readerViewBounds. size. width; y = rect. origin. y/readerViewBounds. size. height; width = rect. size. width/readerViewBounds. size. width; height = rect. size. height/readerViewBounds. size. height; return CGRectMake (x, y, width, height );}

# Pragma mark scan animation-(void) loopDrawLine {CGRect rect = CGRectMake (scanZomeBack. frame. origin. x, scanZomeBack. frame. origin. y, scanZomeBack. frame. size. width, 2); if (readLineView) {[readLineView removeFromSuperview];} readLineView = [[UIImageView alloc] initWithFrame: rect]; [readLineView setImage: [UIImage imageNamed: @ "line.png"]; [UIView animateWithDuration: 3.0 delay: 0.0 options: UIViewAnimationOptio NCurveEaseIn animations: ^ {// write the fream code here in readLineView. frame = CGRectMake (scanZomeBack. frame. origin. x, scanZomeBack. frame. origin. y + scanZomeBack. frame. size. height, scanZomeBack. frame. size. width, 2); [readLineView setAnimationRepeatCount: 0];} completion: ^ (BOOL finished) {if (! Is_Anmotion) {[self loopDrawLine] ;}}]; [readview addSubview: readLineView] ;}# pragma mark obtains scan results-(void) readerView :( ZBarReaderView *) readerView didReadSymbols :( ZBarSymbolSet *) symbols fromImage :( UIImage *) image {// get the scanned barcode content const zbar_symbol_t * symbol = zbar_symbol_set_first_symbolset. zbarSymbolSet); NSString * symbolStr = [NSString stringwithuf8string: zbar_symbol_get_data (symbol)]; if (zbar_symbol_get_type (symbol) = ZBAR_QRCODE) {// QR code} for (ZBarSymbol * symbol in symbols) {[sTxtField setText: symbol. data]; break;} [readerView stop]; [readerView removeFromSuperview];}