Added an api for ios7 to scan the QR code, and added an api for ios7.

Added an api for ios7 to scan the QR code, and added an api for ios7.

I used the ZBar open-source library to scan the QR code, but it seems that arm64 is not supported and is not being updated.

Currently, you do not need to adapt to iOS 7 or lower, but iOS's new system API supports code scanning. Refer to a foreigner's blog for a demo. For more information, see

Reference blog: http://www.appcoda.com/qr-code-ios-programming-tutorial/

#import <AVFoundation/AVFoundation.h>@interface QRCodeReadController : BaseViewController<AVCaptureMetadataOutputObjectsDelegate>@property (weak, nonatomic) IBOutlet UIView *viewPreview;@end

Add a viewPreview to xib to dynamically display the obtained camera content during code scanning.

@ Interface QRCodeReadController () {NSInteger maxY; NSInteger minY; NSTimer * timer; UIImageView * line;} @ property (nonatomic) BOOL isReading; @ property (nonatomic, strong) AVCaptureSession * captureSession; @ property (nonatomic, strong) implements * videoPreviewLayer;-(BOOL) startReading;-(void) stopReading; @ end @ implementation QRCodeReadController-(id) initWithNibName :( NSString *) nibname Nil bundle :( NSBundle *) nibBundleOrNil {self = [super initWithNibName: nibNameOrNil bundle: nibBundleOrNil]; if (self) {// Custom initialization} return self;}-(void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view from its nib. _ isReading = NO; if ([self startReading]) {maxY = 280; minY = 2; line = [[UIImageView alloc] initWithFrame: CGRectMake (0, 0,280, 10)]; // 0-200 [line setImage: [UIImage imageNamed: @ "e0"]; [_ viewPreview addSubview: line]; timer = [nst1_scheduledtimerwithtimeinterval: 1.0/40 target: self selector: @ selector (move) userInfo: nil repeats: YES] ;}}/ *** AVCaptureMetadataOutput object. this class in combination with the AVCaptureMetadataOutputObjectsDelegate protocol will manage to intercept any metadata found in the input device (meanin G data in a QR code captured by our camera) and translate it to a human readable format. */-(BOOL) startReading {NSError * error; AVCaptureDevice * captureDevice = [AVCaptureDevice failed: AVMediaTypeVideo]; optional * input = [cannot deviceInputWithDevice: captureDevice error: & error]; if (! Input) {NSLog (@ "% @", [error localizedDescription]); return NO;} _ captureSession = [[AVCaptureSession alloc] init]; [_ captureSession addInput: input]; optional * captureMetadataOutput = [[financialloc] init]; [_ captureSession addOutput: captureMetadataOutput]; includispatchqueue; dispatchQueue = Queue ("myQueue", NULL); [captureMetadataOutput SetMetadataObjectsDelegate: self queue: dispatchQueue]; [captureMetadataOutput setMetadataObjectTypes: [NSArray arrayWithObject: AVMetadataObjectTypeQRCode]; // show to user what the camera of the device sees using a AVCaptureVideoPreviewLayer _ videoPreviewLayer = [[using alloc] initWithSession: _ captureSession]; [_ videoPreviewLayer setVideoGravity: camera Ill]; [_ videoPreviewLayer setFrame: _ viewPreview. layer. bounds]; [_ viewPreview. layer addSublayer: _ videoPreviewLayer]; [_ captureSession startRunning]; return YES;}-(void) captureOutput :( optional *) captureOutput timeout :( NSArray *) metadataObjects fromConnection :( AVCaptureConnection *) connection {if (metadataObjects! = Nil & [metadataObjects count]> 0) {optional * metadataObj = [metadataObjects objectAtIndex: 0]; if ([[metadataObj type] isEqualToString: AVMetadataObjectTypeQRCode]) {[self defined mselec#mainthread: @ selector (stopReading) withObject: nil waitUntilDone: NO]; NSLog (@ "metadataObj string =%@", [metadataObj stringValue]); _ isReading = NO ;}}} -(void) stopReading {[_ captureSe Ssion stopRunning]; _ captureSession = nil; [_ videoPreviewLayer removeFromSuperlayer];} // when scanning, move the scanning line-(void) move {NSLog (@ "++ "); static BOOL flag = TRUE; // true down and false up if (flag) {if (line. frame. origin. y <maxY) {line. frame = CGRectMake (line. frame. origin. x, line. frame. origin. y + 5, line. frame. size. width, line. frame. size. height);} else {flag =! Flag; if (_ isReading & [timer isValid]) {[timer invalidate] ;}} else {if (line. frame. origin. y> minY) {line. frame = CGRectMake (line. frame. origin. x, line. frame. origin. y-5, line. frame. size. width, line. frame. size. height);} else {flag =! Flag ;}}}

How does ios7 scan QR code to download the app?

Download professional QR code scanning software, which can only be scanned. Android Products
 
Why can't I scan the QR code and prompt "device initialization error" when I upgrade to ios7 "?

The camera option is added to the privacy of ios 7. If you cannot scan the QR code, open the corresponding permission in the system settings. For more information, see section 10000. You can enter the country you want to go to for the overseas service to query the detailed tariff standards. We recommend that you add the Public Account "China Telecom Sichuan service" as your friend. You can check your phone bills and run your business on it, and you can easily handle it yourself. Maybe there are still human resources! View Details