Example Analysis of QR Code Generation and scanning in iOS third Party Framework
This article mainly introduces the iOS third-party framework of QR code generation and scanning example analysis, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian with you to understand.
The details are as follows
Import third-party frames libqrencode (generate QR code) and ZBarSDK (QR code scan)
Import header file
# import "QRCodeGenerator.h" # import "ZBarSDK.h" create two buttons click the event button to generate the QR code-(IBAction) erWeiMaBtn1: (id) sender {/ / set the picture box to store the QR code UIImageView * imgView = [[UIImageView alloc] initWithFrame:CGRectMake ((self.view.frame.size.width-200) / 2,100,200,200)]; / / display to the main view [self.view addSubview:self.imgView] / / use the third-party method to realize the desired QR code imgView.image = [QRCodeGenerator qrImageForString:@ "fool" imageSize:self.imgView.frame.size.width];}
Click the button 2 to scan the QR code
-(IBAction) erWeiMaBtn1: (id) sender {/ / set text field (set to global) _ textView = [[UITextView alloc] initWithFrame:CGRectMake ((self.view.frame.size.width-300) / 2,430,300,300) textContainer:nil]; / / set background color _ textView.backgroundColor = [UIColor blueColor]; / / add to the main view [self.view addSubview:self.textView]; ZBarReaderViewController * reader = [ZBarReaderViewController alloc] init]; reader.readerDelegate = self / / hide the bottom control button reader.showsZBarControls = YES; / / set the self-defined interface / / reader.cameraOverlayView = someView (this view can be defined by yourself, of course, you can also add a masked view by [reader.view addSubview:someView], so you can make the desired view effect) / / set the recognition range (the four parameters here are all the view scale ~ ~ Don't get it wrong (the ratio to the left, the ratio to the top, the ratio to the width, the ratio to the height) / / reader.scanCrop = CGRectMake (0,1Pol 1) / / set the identified parameter ZBarImageScanner * scanner = reader.scanner; [scanner setSymbology:ZBAR_I25 / / this parameter and to: the following parameters work together to determine the identified coding range, which can be adjusted according to the requirements to improve the recognition speed. Config:ZBAR_CFG_ENABLE to:0]; [self presentViewController:reader animated:YES completion:nil];} / / here is the delegated method-(void) imagePickerController: (UIImagePickerController*) reader didFinishPickingMediaWithInfo: (NSDictionary*) info {id results = [info objectForKey: ZBarReaderControllerResults]; ZBarSymbol * symbol = nil; for (symbol in results) break; NSLog (@ "% @", symbol.data); / / print identified data / / set content _ textView.text = symbol.data / / [reader dismissModalViewControllerAnimated:YES];}
Note: fill in the whitelist of available camera scans in info.plist!
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