ios原生二维码扫描识别

完整iOS二维码扫描功能的实现

lhScanQCodeTest_免费高速下载|百度网盘-分享无限制

功能页面给扫一扫按钮添加点击事件进行跳转

lhScanQCodeViewController * sqVC = [[lhScanQCodeViewController alloc]init];

    UINavigationController * nVC = [[UINavigationController alloc]initWithRootViewController:sqVC];

    [self presentViewController:nVC animated:YES completion:^{ }];

逻辑处理  .h文件

#import@interface lhScanQCodeViewController : UIViewController

@end

逻辑处理.m文件

#import "lhScanQCodeViewController.h"#import "QRCodeReaderView.h"#import#import#define DeviceMaxHeight ([UIScreen mainScreen].bounds.size.height)#define DeviceMaxWidth ([UIScreen mainScreen].bounds.size.width)#define widthRate DeviceMaxWidth/320#define IOS8 ([[UIDevice currentDevice].systemVersion intValue] >= 8 ? YES : NO)@interface lhScanQCodeViewController (){

    QRCodeReaderView * readview;//二维码扫描对象


    BOOL isFirst;//第一次进入该页面

    BOOL isPush;//跳转到下一级页面

}

@property (strong, nonatomic) CIDetector *detector;

@end

@implementation lhScanQCodeViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    self.title = @"扫描";

    self.view.backgroundColor = [UIColor whiteColor];


    UIBarButtonItem * rbbItem = [[UIBarButtonItem alloc]initWithTitle:@"相册" style:UIBarButtonItemStyleDone target:self action:@selector(alumbBtnEvent)];

    self.navigationItem.rightBarButtonItem = rbbItem;


    UIBarButtonItem * lbbItem = [[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStyleDone target:self action:@selector(backButtonEvent)];

    self.navigationItem.leftBarButtonItem = lbbItem;


    isFirst = YES;

    isPush = NO;


    [self InitScan];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

#pragma mark - 返回

- (void)backButtonEvent

{

    [self dismissViewControllerAnimated:YES completion:^{


    }];

}

#pragma mark 初始化扫描

- (void)InitScan

{

    if (readview) {

        [readview removeFromSuperview];

        readview = nil;

    }


    readview = [[QRCodeReaderView alloc]initWithFrame:CGRectMake(0, 0, DeviceMaxWidth, DeviceMaxHeight)];

    readview.is_AnmotionFinished = YES;

    readview.backgroundColor = [UIColor clearColor];

    readview.delegate = self;

    readview.alpha = 0;


    [self.view addSubview:readview];


    [UIView animateWithDuration:0.5 animations:^{

        readview.alpha = 1;

    }completion:^(BOOL finished) {

    }];


}

#pragma mark - 相册

- (void)alumbBtnEvent

{


    self.detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:@{ CIDetectorAccuracy : CIDetectorAccuracyHigh }];

    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) { //判断设备是否支持相册


        if (IOS8) {

            UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"提示" message:@"未开启访问相册权限,现在去开启!" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];

            alert.tag = 4;

            [alert show];

        }

        else{

            UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"提示" message:@"设备不支持访问相册,请在设置->隐私->照片中进行设置!" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];

            [alert show];

        }


        return;

    }


    isPush = YES;

    UIImagePickerController *mediaUI = [[UIImagePickerController alloc] init];

    mediaUI.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    mediaUI.mediaTypes = [UIImagePickerController        availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeSavedPhotosAlbum];

    mediaUI.allowsEditing = NO;

    mediaUI.delegate = self;

    [self presentViewController:mediaUI animated:YES completion:^{

        [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:YES];

    }];



}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{


    UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];

    if (!image){

        image = [info objectForKey:UIImagePickerControllerOriginalImage];

    }


    readview.is_Anmotion = YES;


    NSArray *features = [self.detector featuresInImage:[CIImage imageWithCGImage:image.CGImage]];

    if (features.count >=1) {


        [picker dismissViewControllerAnimated:YES completion:^{

            [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];

            CIQRCodeFeature *feature = [features objectAtIndex:0];

            NSString *scannedResult = feature.messageString;

            //播放扫描二维码的声音

            SystemSoundID soundID;

            NSString *strSoundFile = [[NSBundle mainBundle] pathForResource:@"noticeMusic" ofType:@"wav"];

            AudioServicesCreateSystemSoundID((__bridge CFURLRef)[NSURL fileURLWithPath:strSoundFile],&soundID);

            AudioServicesPlaySystemSound(soundID);


            [self accordingQcode:scannedResult];

        }];


    }

    else{

        UIAlertView * alertView = [[UIAlertView alloc]initWithTitle:@"提示" message:@"该图片没有包含一个二维码!" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];

        [alertView show];


        [picker dismissViewControllerAnimated:YES completion:^{

            [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];


            readview.is_Anmotion = NO;

            [readview start];

        }];

    }

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

    [picker dismissViewControllerAnimated:YES completion:^{

        [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];

    }];


}

#pragma mark -QRCodeReaderViewDelegate

- (void)readerScanResult:(NSString *)result

{

    readview.is_Anmotion = YES;

    [readview stop];


    //播放扫描二维码的声音

    SystemSoundID soundID;

    NSString *strSoundFile = [[NSBundle mainBundle] pathForResource:@"noticeMusic" ofType:@"wav"];

    AudioServicesCreateSystemSoundID((__bridge CFURLRef)[NSURL fileURLWithPath:strSoundFile],&soundID);

    AudioServicesPlaySystemSound(soundID);


    [self accordingQcode:result];


    [self performSelector:@selector(reStartScan) withObject:nil afterDelay:1.5];

}

#pragma mark - 扫描结果处理

- (void)accordingQcode:(NSString *)str

{

    UIAlertView * alertView = [[UIAlertView alloc]initWithTitle:@"扫描结果" message:str delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];

    [alertView show];

}

- (void)reStartScan

{

    readview.is_Anmotion = NO;


    if (readview.is_AnmotionFinished) {

        [readview loopDrawLine];

    }


    [readview start];

}

#pragma mark - view

- (void)viewWillAppear:(BOOL)animated

{

    [super viewWillAppear:animated];


    if (isFirst || isPush) {

        if (readview) {

            [self reStartScan];

        }

    }


}

- (void)viewDidDisappear:(BOOL)animated

{

    [super viewDidDisappear:animated];


    if (readview) {

        [readview stop];

        readview.is_Anmotion = YES;

    }


}

- (void)viewDidAppear:(BOOL)animated

{

    [super viewDidAppear:animated];


    if (isFirst) {

        isFirst = NO;

    }

    if (isPush) {

        isPush = NO;

    }

}

@end

界面的展示.H文件

#import/** * Simple view to display an overlay (a square) over the camera view. * @since 2.0.0 */@protocol QRCodeReaderViewDelegate- (void)readerScanResult:(NSString *)result;@end@interface QRCodeReaderView : UIView@property (nonatomic, weak) id delegate;

@property (nonatomic,copy)UIImageView * readLineView;

@property (nonatomic,assign)BOOL is_Anmotion;

@property (nonatomic,assign)BOOL is_AnmotionFinished;

//开启关闭扫描

- (void)start;

- (void)stop;

- (void)loopDrawLine;//初始化扫描线

@end

界面的.M文件

#import "QRCodeReaderView.h"#import#define DeviceMaxHeight ([UIScreen mainScreen].bounds.size.height)#define DeviceMaxWidth ([UIScreen mainScreen].bounds.size.width)#define widthRate DeviceMaxWidth/320#define contentTitleColorStr @"666666" //正文颜色较深@interface QRCodeReaderView (){

    AVCaptureSession * session;


    NSTimer * countTime;

}

@property (nonatomic, strong) CAShapeLayer *overlay;

@end

@implementation QRCodeReaderView

- (id)initWithFrame:(CGRect)frame

{

    if ((self = [super initWithFrame:frame])) {

        [self instanceDevice];

  }


  return self;

}

- (void)instanceDevice

{

    //扫描区域

    UIImage *hbImage=[UIImage imageNamed:@"scanscanBg"];

    UIImageView * scanZomeBack=[[UIImageView alloc] init];

    scanZomeBack.backgroundColor = [UIColor clearColor];

    scanZomeBack.layer.borderColor = [UIColor whiteColor].CGColor;

    scanZomeBack.layer.borderWidth = 2.5;

    scanZomeBack.image = hbImage;

    //添加一个背景图片

    CGRect mImagerect = CGRectMake(60*widthRate, (DeviceMaxHeight-200*widthRate)/2, 200*widthRate, 200*widthRate);

    [scanZomeBack setFrame:mImagerect];

    CGRect scanCrop=[self getScanCrop:mImagerect readerViewBounds:self.frame];

    [self addSubview:scanZomeBack];


    //获取摄像设备

    AVCaptureDevice * device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

    //创建输入流

    AVCaptureDeviceInput * input = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];

    //创建输出流

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

    //设置代理 在主线程里刷新

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

    output.rectOfInterest = scanCrop;


    //初始化链接对象

    session = [[AVCaptureSession alloc]init];

    //高质量采集率

    [session setSessionPreset:AVCaptureSessionPresetHigh];

    if (input) {

        [session addInput:input];

    }

    if (output) {

        [session addOutput:output];

        //设置扫码支持的编码格式(如下设置条形码和二维码兼容)

        NSMutableArray *a = [[NSMutableArray alloc] init];

        if ([output.availableMetadataObjectTypes containsObject:AVMetadataObjectTypeQRCode]) {

            [a addObject:AVMetadataObjectTypeQRCode];

        }

        if ([output.availableMetadataObjectTypes containsObject:AVMetadataObjectTypeEAN13Code]) {

            [a addObject:AVMetadataObjectTypeEAN13Code];

        }

        if ([output.availableMetadataObjectTypes containsObject:AVMetadataObjectTypeEAN8Code]) {

            [a addObject:AVMetadataObjectTypeEAN8Code];

        }

        if ([output.availableMetadataObjectTypes containsObject:AVMetadataObjectTypeCode128Code]) {

            [a addObject:AVMetadataObjectTypeCode128Code];

        }

        output.metadataObjectTypes=a;

    }


    AVCaptureVideoPreviewLayer * layer = [AVCaptureVideoPreviewLayer layerWithSession:session];

    layer.videoGravity=AVLayerVideoGravityResizeAspectFill;

    layer.frame=self.layer.bounds;

    [self.layer insertSublayer:layer atIndex:0];


    [self setOverlayPickerView:self];


    //开始捕获

    [session startRunning];



}

-(void)loopDrawLine

{

    _is_AnmotionFinished = NO;

    CGRect rect = CGRectMake(60*widthRate, (DeviceMaxHeight-200*widthRate)/2, 200*widthRate, 2);

    if (_readLineView) {

        _readLineView.alpha = 1;

        _readLineView.frame = rect;

    }

    else{

        _readLineView = [[UIImageView alloc] initWithFrame:rect];

        [_readLineView setImage:[UIImage imageNamed:@"scanLine"]];

        [self addSubview:_readLineView];

    }


    [UIView animateWithDuration:1.5 animations:^{

        //修改fream的代码写在这里

        _readLineView.frame =CGRectMake(60*widthRate, (DeviceMaxHeight-200*widthRate)/2+200*widthRate-5, 200*widthRate, 2);

    } completion:^(BOOL finished) {

        if (!_is_Anmotion) {

            [self loopDrawLine];

        }

        _is_AnmotionFinished = YES;

    }];

}

- (void)setOverlayPickerView:(QRCodeReaderView *)reader

{


    CGFloat wid = 60*widthRate;

    CGFloat heih = (DeviceMaxHeight-200*widthRate)/2;


    //最上部view

    CGFloat alpha = 0.6;

    UIView* upView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, DeviceMaxWidth, heih)];

    upView.alpha = alpha;

    upView.backgroundColor = [self colorFromHexRGB:contentTitleColorStr];

    [reader addSubview:upView];


    //用于说明的label

    UILabel * labIntroudction= [[UILabel alloc] init];

    labIntroudction.backgroundColor = [UIColor clearColor];

    labIntroudction.frame=CGRectMake(0, 64+(heih-64-50*widthRate)/2, DeviceMaxWidth, 50*widthRate);

    labIntroudction.textAlignment = NSTextAlignmentCenter;

    labIntroudction.textColor=[UIColor whiteColor];

    labIntroudction.text=@"请扫描XXXX支付二维码";

    [upView addSubview:labIntroudction];


    //左侧的view

    UIView * cLeftView = [[UIView alloc] initWithFrame:CGRectMake(0, heih, wid, 200*widthRate)];

    cLeftView.alpha = alpha;

    cLeftView.backgroundColor = [self colorFromHexRGB:contentTitleColorStr];

    [reader addSubview:cLeftView];


    //右侧的view

    UIView *rightView = [[UIView alloc] initWithFrame:CGRectMake(DeviceMaxWidth-wid, heih, wid, 200*widthRate)];

    rightView.alpha = alpha;

    rightView.backgroundColor = [self colorFromHexRGB:contentTitleColorStr];

    [reader addSubview:rightView];


    //底部view

    UIView * downView = [[UIView alloc] initWithFrame:CGRectMake(0, heih+200*widthRate, DeviceMaxWidth, DeviceMaxHeight - heih-200*widthRate)];

    downView.alpha = alpha;

    downView.backgroundColor = [self colorFromHexRGB:contentTitleColorStr];

    [reader addSubview:downView];


    //开关灯button

    UIButton * turnBtn = [UIButton buttonWithType:UIButtonTypeCustom];

    turnBtn.backgroundColor = [UIColor clearColor];

    [turnBtn setBackgroundImage:[UIImage imageNamed:@"lightSelect"] forState:UIControlStateNormal];

    [turnBtn setBackgroundImage:[UIImage imageNamed:@"lightNormal"] forState:UIControlStateSelected];

    turnBtn.frame=CGRectMake((DeviceMaxWidth-50*widthRate)/2, (CGRectGetHeight(downView.frame)-50*widthRate)/2, 50*widthRate, 50*widthRate);

    [turnBtn addTarget:self action:@selector(turnBtnEvent:) forControlEvents:UIControlEventTouchUpInside];

    [downView addSubview:turnBtn];


}

- (void)turnBtnEvent:(UIButton *)button_

{

    button_.selected = !button_.selected;

    if (button_.selected) {

        [self turnTorchOn:YES];

    }

    else{

        [self turnTorchOn:NO];

    }


}

- (void)turnTorchOn:(bool)on

{

    Class captureDeviceClass = NSClassFromString(@"AVCaptureDevice");

    if (captureDeviceClass != nil) {

        AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];


        if ([device hasTorch] && [device hasFlash]){


            [device lockForConfiguration:nil];

            if (on) {

                [device setTorchMode:AVCaptureTorchModeOn];

                [device setFlashMode:AVCaptureFlashModeOn];


            } else {

                [device setTorchMode:AVCaptureTorchModeOff];

                [device setFlashMode:AVCaptureFlashModeOff];

            }

            [device unlockForConfiguration];

        }

    }

}

-(CGRect)getScanCrop:(CGRect)rect readerViewBounds:(CGRect)readerViewBounds

{


    CGFloat x,y,width,height;


//    width = (CGFloat)(rect.size.height+10)/readerViewBounds.size.height;

//   

//    height = (CGFloat)(rect.size.width-50)/readerViewBounds.size.width;

//   

//    x = (1-width)/2;

//    y = (1-height)/2;


    x = (CGRectGetHeight(readerViewBounds)-CGRectGetHeight(rect))/2/CGRectGetHeight(readerViewBounds);

    y = (CGRectGetWidth(readerViewBounds)-CGRectGetWidth(rect))/2/CGRectGetWidth(readerViewBounds);

    width = CGRectGetHeight(rect)/CGRectGetHeight(readerViewBounds);

    height = CGRectGetWidth(rect)/CGRectGetWidth(readerViewBounds);


    return CGRectMake(x, y, width, height);


}

- (void)start

{

    [session startRunning];

}

- (void)stop

{

    [session stopRunning];

}

#pragma mark - 扫描结果

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

{

    if (metadataObjects && metadataObjects.count>0) {

        AVMetadataMachineReadableCodeObject * metadataObject = [metadataObjects objectAtIndex : 0 ];

        //输出扫描字符串

        if (_delegate && [_delegate respondsToSelector:@selector(readerScanResult:)]) {

            [_delegate readerScanResult:metadataObject.stringValue];

        }

    }

}

#pragma mark - 颜色

//获取颜色

- (UIColor *)colorFromHexRGB:(NSString *)inColorString

{

    UIColor *result = nil;

    unsigned int colorCode = 0;

    unsigned char redByte, greenByte, blueByte;


    if (nil != inColorString)

    {

        NSScanner *scanner = [NSScanner scannerWithString:inColorString];

        (void) [scanner scanHexInt:&colorCode]; // ignore error

    }

    redByte = (unsigned char) (colorCode >> 16);

    greenByte = (unsigned char) (colorCode >> 8);

    blueByte = (unsigned char) (colorCode); // masks off high bits

    result = [UIColor

              colorWithRed: (float)redByte / 0xff

              green: (float)greenByte/ 0xff

              blue: (float)blueByte / 0xff

              alpha:1.0];

    return result;

}

@end

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