IOS原生 二维码

步骤：//1.创建一个输入设备(扫描)摄像头->采集信息AVCaptureDeviceInput

//2.输出设备解析采集到信息AVCaptureMetadataOutput

//3.会话联系输入跟输出AVCa

ptureSession

//4.特殊的视图来展示输入设备采集到的信息AVCaptureVideoPreviewLayer

//5.代理

//6.开启会话

//设置扫描范围

[self.sessionsetSessionPreset:AVCaptureSessionPresetHigh];

[self.sessionstartRunning];

扩展:

AVCaptureDevice*inputDevice = [AVCaptureDevicedefaultDeviceWithMediaType:AVMediaTypeVideo];

AVF_EXPORTNSString*constAVMediaTypeVideoNS_AVAILABLE(10_7,4_0);

AVF_EXPORTNSString*constAVMediaTypeAudioNS_AVAILABLE(10_7,4_0);

AVF_EXPORTNSString*constAVMediaTypeTextNS_AVAILABLE(10_7,4_0);

AVF_EXPORTNSString*constAVMediaTypeClosedCaptionNS_AVAILABLE(10_7,4_0);

AVF_EXPORTNSString*constAVMediaTypeSubtitleNS_AVAILABLE(10_7,4_0);

AVF_EXPORTNSString*constAVMediaTypeTimecodeNS_AVAILABLE(10_7,4_0);

AVF_EXPORTNSString*constAVMediaTypeMetadataNS_AVAILABLE(10_8,6_0);

AVF_EXPORTNSString*constAVMediaTypeMuxedNS_AVAILABLE(10_7,4_0);

#import "ViewController.h"

@interface ViewController ()

@property (strong ,nonatomic)UIWebView *shaomaView;

//1.创建一个输入设备  (扫描) 摄像头 -> 采集信息

@property(nonatomic,strong)AVCaptureDeviceInput *input;

//2.输出设备 解析采集到信息

//元数据

@property(nonatomic,strong) AVCaptureMetadataOutput *output;

//3.会话 联系 输入跟输出

@property(nonatomic,strong) AVCaptureSession *session;

//4.特殊的视图 来展示输入设备采集到的信息

@property(nonatomic,strong) AVCaptureVideoPreviewLayer *layer;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

[self.view addSubview:self.shaomaView];

//1.输入设备 : 1.摄像头 2.麦克风 3.键盘鼠标

AVCaptureDevice *inputDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

NSError *error = nil;

self.input = [AVCaptureDeviceInput deviceInputWithDevice:inputDevice error:&error];

//2.输出设备

self.output = [[AVCaptureMetadataOutput alloc]init];

//3.会话  联系输入和输出

self.session = [[AVCaptureSession alloc]init];

if ([self.session canAddInput:self.input]) {

[self.session addInput:self.input];

}

if ([self.session canAddOutput:self.output]) {

[self.session addOutput:self.output];

}

//4.特殊的视图

self.layer = [[AVCaptureVideoPreviewLayer alloc]initWithSession:self.session];

self.layer.frame = self.view.bounds;

[self.view.layer addSublayer:self.layer];

//5.代理

[self.output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];

self.output.metadataObjectTypes = @[AVMetadataObjectTypeQRCode];

//6.开启会话

//设置扫描范围

[self.session setSessionPreset:AVCaptureSessionPresetHigh];

[self.session startRunning];

}

/**

* 扫描到信息就会调用

*

*  @param captureOutput

*  @param metadataObjects

*  @param connection

*/

- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection

{

[self.layer removeFromSuperlayer];

[self.session stopRunning];

for (AVMetadataMachineReadableCodeObject * objc in metadataObjects) {

NSLog(@"%@",objc.stringValue);

//跳转控制器

//http://weixinpay.www.baidu.com push

[self.shaomaView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:objc.stringValue]]];

[self.shaomaView reload];

}

}

- (UIWebView *)shaomaView{

if (!_shaomaView) {

_shaomaView = [[UIWebView alloc]initWithFrame:self.view.frame];

}

return _shaomaView;

}

@end