IOS Two-dimensional code

Basically we do two-dimensional code implementation method has three main ways: Zbar, ZXing, Avfoundation.

The first type: Zbar

1. Download zbarsdk and import into the project

2. Import Dependent libraries:

quartzcore.framework, Corevideo.framework, Coremedia.framework,avfoundation.framework

3. If does not contain bitcode, please click here

There are two ways of 4.Zbar:

The 1> mode is a regular way to scan through the Zbarreaderviewcontroller directly by opening a scanning interface.

First refer to the header file #import "ZBarSDK.h" to implement proxy <ZBarReaderDelegate>

Initialize scan QR Code controller

Zbarreaderviewcontroller *reader = [Zbarreaderviewcontroller new];

Set up Proxy

Reader.readerdelegate = self;

QR Code/Barcode Recognition Settings

Zbarimagescanner *scanner = Reader.scanner;

[Scanner setsymbology:zbar_i25

Config:zbar_cfg_enable

TO:0];

Pop-up system camera, full screen shot

[Self Presentviewcontroller:reader animated:yes completion:nil];

-(void) Imagepickercontroller: (Uiimagepickercontroller *) Picker Didfinishpickingmediawithinfo: (NSDictionary *) info

{

id<nsfastenumeration> results = [info objectforkey:zbarreadercontrollerresults];

Zbarsymbol * symbol;

for (symbol in results)

Break

Self.imageView.image = [info objectforkey:uiimagepickercontrolleroriginalimage];

[Picker Dismissviewcontrolleranimated:yes Completion:nil];

Self.label.text = Symbol.data;

Note: Symbol.data is the value after scanning the QR code, [info objectforkey:uiimagepickercontrolleroriginalimage] is the image after scanning the QR code

}

2> mode is the way to customize the scanning interface. That is, customize the Zbarreaderview interface to achieve customized results.

First refer to the header file #import "ZBarSDK.h" to implement proxy <ZBarReaderViewDelegate>

Initialize scan QR code object Zbarreaderview

_readview = [[Zbarreaderview alloc] init];

Set up a scan agent

_readview.readerdelegate = self;

Turn off the Flash

_readview.torchmode = 0;

Show frame rate

_readview.showsfps = NO;

Add its camera capture view to the view you want to display

[Self.view Addsubview:_readview];

QR Code/Barcode Recognition Settings

Zbarimagescanner *scanner = _readview.scanner;

[Scanner setsymbology:zbar_i25

Config:zbar_cfg_enable

TO:0];

When scanning the QR code, the recognition success will enter this method, read the QR code content

-(void) Readerview: (zbarreaderview*) Readerview didreadsymbols: (zbarsymbolset*) symbols FromImage: (uiimage*) image

{

Zbarsymbol * Symbol =nil;

for (symbol in symbols)

Break

Note: Symbol.data is the value after scanning the QR code, image is the image after scanning the QR code

}

When generating two-dimensional code:

First, import the Libqrencode framework to #import "QRCodeGenerator.h" guide in

The returned image = [Qrcodegenerator qrimageforstring:@ ' string "imageSize:testImageView.bounds.size.width];

Of course, you can save it to an album

Save QR code images to albums

-(void) saveimagetoalbum

{

Uiimagewritetosavedphotosalbum (The returned image, self, @selector (image:didFinishSavingWithError:contextInfo:), NULL);

}

Save Picture callback method

-(void) Image: (UIImage *) image didfinishsavingwitherror: (nserror *) error ContextInfo: (void *) ContextInfo

{

if (Error! = NULL)

{

Uialertcontroller *ALERTVC = [Uialertcontroller alertcontrollerwithtitle:@ "Please open the app's album permissions" Message:nil PreferredStyle: Uialertcontrollerstylealert];

Uialertaction *action = [uialertaction actionwithtitle:@ "OK" style:uialertactionstylecancel handler:^ (UIAlertAction * Action) {

}];

[ALERTVC addaction:action];

[Self PRESENTVIEWCONTROLLER:ALERTVC animated:yes completion:^{

}];

}

Else

{

Uialertcontroller *ALERTVC = [Uialertcontroller alertcontrollerwithtitle:@ "saved to album" Message:nil PreferredStyle: Uialertcontrollerstylealert];

Uialertaction *action = [uialertaction actionwithtitle:@ "OK" style:uialertactionstylecancel handler:^ (UIAlertAction * Action) {

}];

[ALERTVC addaction:action];

[Self PRESENTVIEWCONTROLLER:ALERTVC animated:yes completion:^{

}];

}

}

IOS QR code