Two-dimensional code

Generate two-dimensional code

Prerequisites: you need to import the following code

1. Define a Uiimageview attribute in the Viewcontroller. m file, storing the QR code

@property (Weak, nonatomic) Iboutlet Uiimageview *imageview;

2. Write the following code in the Viewdidload method

Self.imageView.image = [Qrcodegenerator qrimageforstring:@ "Huan Huan" imageSize:self.imageView.frame.size.width];

QR Code Scan: On the real machine can

Prerequisites: need to introduce a system framework

#import <AVFoundation/AVFoundation.h>

1. Defining attributes

@property (nonatomic, strong) avcapturesession *capturesession;

2. Write the following code in Viewdidload

Self.capturesession = [[Avcapturesession alloc] init];

Customizing the Camera Interface

Avcapturedevice *device = [Avcapturedevice Defaultdevicewithmediatype:avmediatypeaudio];

Avcapturedeviceinput *input = [Avcapturedeviceinput deviceinputwithdevice:device error:nil];

Set the input stream for the session

[_capturesession Addinput:input];

Set the output stream of the session

Avcapturemetadataoutput *output = [[Avcapturemetadataoutput alloc] init];

To set the proxy for the output stream

[OutPut setmetadataobjectsdelegate:self Queue:dispatch_get_main_queue ()];

Set the type of sweep code

[_capturesession Addoutput:output];

Two-dimensional code and human face

[OutPut Setmetadataobjecttypes:@[avmetadataobjecttypeqrcode, Avmetadataobjecttypeface]];

Creating a camera coating

Avcapturevideopreviewlayer *layer = [Avcapturevideopreviewlayer layerWithSession:self.captureSession];

Layer.frame = Self.view.bounds;

[Self.view.layer Addsublayer:layer];

Start scanning

[Self.capturesession startrunning];

Two-dimensional code