二維碼功能方便快捷,，深受用戶喜愛,，本文為大家簡單介紹,，一對一直播系統(tǒng)開發(fā)想要實現(xiàn)在APP內(nèi)實現(xiàn)掃描二維碼功能，需要以下幾步,。

一,、首先是二維碼的獲取和分析，需要一對一直播系統(tǒng)開發(fā)源碼獲取手機攝像頭使用權(quán)限,，設(shè)置掃描范圍,，進入二維碼界面后，會對界面進行初始化,。

2.    // 1,、獲取攝像設(shè)備

3.    AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

4.    

5.    // 2、創(chuàng)建攝像設(shè)備輸入流

6.    AVCaptureDeviceInput *deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];

7.    

8.    // 3,、創(chuàng)建元數(shù)據(jù)輸出流

9.    AVCaptureMetadataOutput *metadataOutput = [[AVCaptureMetadataOutput alloc] init];

10.    [metadataOutput setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];

11.    [metadataOutput setRectOfInterest:CGRectMake((self.view.frame.size.height - 220)*0.5/UIScreen.mainScreen.bounds.size.height,

12.                                          (self.view.frame.size.width - 220)*0.5/UIScreen.mainScreen.bounds.size.width,

13.                                          220/UIScreen.mainScreen.bounds.size.height,

14.                                          220/UIScreen.mainScreen.bounds.size.width)];

15.    // 設(shè)置掃描范圍（每一個取值0～1,，以屏幕右上角為坐標(biāo)原點）

16.    // 注：微信二維碼的掃描范圍是整個屏幕，這里并沒有做處理（可不用設(shè)置）;

17.    // 如需限制掃描框范圍,，打開下一句注釋代碼并進行相應(yīng)調(diào)整

18.    //    metadataOutput.rectOfInterest = CGRectMake(0.05, 0.2, 0.7, 0.6);

19.    

20.    // 4,、創(chuàng)建會話對象

21.    _session = [[AVCaptureSession alloc] init];

22.    // 并設(shè)置會話采集率

23.    _session.sessionPreset = AVCaptureSessionPreset1920x1080;

24.    

25.    // 5、添加元數(shù)據(jù)輸出流到會話對象

26.    [_session addOutput:metadataOutput];

27.    

28.    // 創(chuàng)建攝像數(shù)據(jù)輸出流并將其添加到會話對象上,  --> 用于識別光線強弱

29.    self.videoDataOutput = [[AVCaptureVideoDataOutput alloc] init];

30.    [_videoDataOutput setSampleBufferDelegate:self queue:dispatch_get_main_queue()];

31.    [_session addOutput:_videoDataOutput];

32.    

33.    // 6,、添加攝像設(shè)備輸入流到會話對象

34.    [_session addInput:deviceInput];

35.    

36.    // 7,、設(shè)置數(shù)據(jù)輸出類型(如下設(shè)置為條形碼和二維碼兼容)，需要將數(shù)據(jù)輸出添加到會話后,，才能指定元數(shù)據(jù)類型,，否則會報錯

37.    metadataOutput.metadataObjectTypes = @[AVMetadataObjectTypeQRCode, AVMetadataObjectTypeEAN13Code,  AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode128Code];

38.    

39.    // 8、實例化預(yù)覽圖層, 用于顯示會話對象

40.    _videoPreviewLayer = [AVCaptureVideoPreviewLayer layerWithSession:_session];

41.    // 保持縱橫比,；填充層邊界

42.    _videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;

43.    CGFloat x = 0;

44.    CGFloat y = 0;

45.    CGFloat w = [UIScreen mainScreen].bounds.size.width;

46.    CGFloat h = [UIScreen mainScreen].bounds.size.height;

47.    _videoPreviewLayer.frame = CGRectMake(x, y, w, h);

48.    [self.view.layer insertSublayer:_videoPreviewLayer atIndex:0];

49.    

50.    // 9,、啟動會話

51.    [_session startRunning];

二、添加一對一直播系統(tǒng)開發(fā)源碼掃描涂層,，設(shè)置掃描蒙版，檢測邊框,、鏤空,、二維碼圖標(biāo)的四個角角落。

//懵層

- (UIView *)hudView

{

    if (!_hudView) {

        _hudView = [[UIView alloc] initWithFrame:CGRectMake(0, 64+statusbarHeight, _window_width, _window_height-64-statusbarHeight)];

        CGFloat x = (self.view.frame.size.width - 220)*0.5;

        CGFloat y = (self.view.frame.size.height - 220)*0.4;

        CGFloat height = 220;

        //鏤空

        CGRect qrRect = CGRectMake(x,y,height, height);

        UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:self.view.frame cornerRadius:0];

        UIBezierPath *circlePath = [UIBezierPath bezierPathWithRect:qrRect];

        [path appendPath:circlePath];

        [path setUsesEvenOddFillRule:YES];

        CAShapeLayer *fillLayer = [CAShapeLayer layer];

        fillLayer.path = path.CGPath;

        fillLayer.fillRule = kCAFillRuleEvenOdd;

        fillLayer.fillColor = [UIColor colorWithRed:0/255.0 green:0/255.0 blue:0/255.0 alpha:0.4].CGColor;

        fillLayer.opacity = 0.5;

        [_hudView.layer addSublayer:fillLayer];

        //白色矩形

        UIBezierPath *bezierPath = [UIBezierPath bezierPathWithRect:CGRectMake(x, y, height, height)];

        CAShapeLayer *shapLayer = [CAShapeLayer layer];

        shapLayer.backgroundColor = UIColor.clearColor.CGColor;

        shapLayer.path = bezierPath.CGPath;

        shapLayer.lineWidth = 0.5;

        shapLayer.strokeColor = UIColor.whiteColor.CGColor;

        shapLayer.fillColor = UIColor.clearColor.CGColor;

        [_hudView.layer addSublayer:shapLayer];

        //紅色四個角落

        UIBezierPath *cornerBezierPath = [UIBezierPath bezierPath];

        [cornerBezierPath moveToPoint:CGPointMake(x, y+30)];//左上角

        [cornerBezierPath addLineToPoint:CGPointMake(x, y)];

        [cornerBezierPath addLineToPoint:CGPointMake(x+30, y)];

        [cornerBezierPath moveToPoint:CGPointMake(x+height-30, y)];//右上角

        [cornerBezierPath addLineToPoint:CGPointMake(x+height, y)];

        [cornerBezierPath addLineToPoint:CGPointMake(x+height, y+30)];

        [cornerBezierPath moveToPoint:CGPointMake(x+height, y+height-30)];//左上角

        [cornerBezierPath addLineToPoint:CGPointMake(x+height, y+height)];

        [cornerBezierPath addLineToPoint:CGPointMake(x+height-30, y+height)];

        [cornerBezierPath moveToPoint:CGPointMake(x+30, y+height)];//左上角

        [cornerBezierPath addLineToPoint:CGPointMake(x, y+height)];

        [cornerBezierPath addLineToPoint:CGPointMake(x, y+height-30)];

        CAShapeLayer *cornerShapLayer = [CAShapeLayer layer];

        cornerShapLayer.backgroundColor = UIColor.clearColor.CGColor;

        cornerShapLayer.path = cornerBezierPath.CGPath;

        cornerShapLayer.lineWidth = 3.0;

        cornerShapLayer.strokeColor = [UIColor redColor].CGColor;

        cornerShapLayer.fillColor = UIColor.clearColor.CGColor;

        [_hudView.layer addSublayer:cornerShapLayer];

    }

    return _hudView;

}

三,、掃描完成,，對掃描結(jié)果進行分析和處理。一般一對一直播源碼的掃描結(jié)果分為兩種。

1,、掃描結(jié)果分析成功,，跳轉(zhuǎn)相關(guān)頁面

2、掃描結(jié)果解析失敗,，顯示暫未識別出掃描結(jié)果,。

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

    if (metadataObjects != nil && metadataObjects.count > 0) {

        AVMetadataMachineReadableCodeObject *obj = metadataObjects[0];

        NSDictionary *infoDic = [self convertJsonStringToNSDictionary:[obj stringValue]];

        NSLog(@"sweepcodeVC--------:%@",infoDic);

        if ([[infoDic valueForKey:@"scope"] isEqual:@"laolaiwang"]) {

            if ([minstr([[infoDic valueForKey:@"data"] valueForKey:@"type"]) isEqual:@"1"]) {

                [_session stopRunning] ;

                otherUserMsgVC  *person = [[otherUserMsgVC alloc]init];

                person.userID = minstr([[infoDic valueForKey:@"data"] valueForKey:@"uid"]);

                [self.navigationController pushViewController:person animated:YES];

            }else if ([minstr([[infoDic valueForKey:@"data"] valueForKey:@"type"]) isEqual:@"2"]){

                [self loginManagerWithDic:infoDic];

            }

        }

    } else {

        NSLog(@"暫未識別出掃描的二維碼");

    }

}

以上就是一對一直播源碼開發(fā)的掃描二維碼功能的大體流程實現(xiàn)，該功能對于提高用戶感受和方便用戶使用都有幫助,，在萬物皆可掃一掃的時代背景下,，開發(fā)這個功能能夠加強一對一直播源碼開發(fā)增強社交性、互動性,，滿足人們的社交需求,。