一對一直播系統開發如何在頁面內實現掃描二維碼功能

二維碼功能方便快捷，深受用戶喜好，本文爲你們簡單介紹，一對一直播系統開發想要實如今APP內實現掃描二維碼功能，須要如下幾步。

1、首先是二維碼的獲取和分析，須要一對一直播系統開發源碼獲取手機攝像頭使用權限，設置掃描範圍，進入二維碼界面後，會對界面進行初始化。

2. // 一、獲取攝像設備
3. AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
5. // 二、建立攝像設備輸入流
6. AVCaptureDeviceInput *deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
8. // 三、建立元數據輸出流
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. // 設置掃描範圍（每個取值0～1，以屏幕右上角爲座標原點）
16. // 注：微信二維碼的掃描範圍是整個屏幕，這裏並無作處理（可不用設置）;
17. // 如需限制掃描框範圍，打開下一句註釋代碼並進行相應調整
18. // metadataOutput.rectOfInterest = CGRectMake(0.05, 0.2, 0.7, 0.6);
20. // 四、建立會話對象
21. _session = [[AVCaptureSession alloc] init];
22. // 並設置會話採集率
23. _session.sessionPreset = AVCaptureSessionPreset1920x1080;
25. // 五、添加元數據輸出流到會話對象
26. [_session addOutput:metadataOutput];
28. // 建立攝像數據輸出流並將其添加到會話對象上, --> 用於識別光線強弱
29. self.videoDataOutput = [[AVCaptureVideoDataOutput alloc] init];
30. [_videoDataOutput setSampleBufferDelegate:self queue:dispatch_get_main_queue()];
31. [_session addOutput:_videoDataOutput];
33. // 六、添加攝像設備輸入流到會話對象
34. [_session addInput:deviceInput];
36. // 七、設置數據輸出類型(以下設置爲條形碼和二維碼兼容)，須要將數據輸出添加到會話後，才能指定元數據類型，不然會報錯
37. metadataOutput.metadataObjectTypes = @[AVMetadataObjectTypeQRCode, AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode128Code];
39. // 八、實例化預覽圖層, 用於顯示會話對象
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];
50. // 九、啓動會話
51. [_session startRunning];

2、添加一對一直播系統開發源碼掃描塗層，設置掃描蒙版，檢測邊框、鏤空、二維碼圖標的四個角角落。

//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;
  }

3、掃描完成，對掃描結果進行分析和處理。通常一對一直播源碼的掃描結果分爲兩種。
一、掃描結果分析成功，跳轉相關頁面
二、掃描結果解析失敗，顯示暫未識別出掃描結果。

• (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]];br/>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 {br/>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的掃描二維碼功能的大致流程實現，該功能對於提升用戶感覺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，開發這個功能可以增強一對一直播源碼開發加強社交性、互動性，知足人們的社交需求。