diff --git a/Source/LBXScanWrapper.swift b/Source/LBXScanWrapper.swift
index 126441c..ff2387a 100755
--- a/Source/LBXScanWrapper.swift
+++ b/Source/LBXScanWrapper.swift
@@ -280,6 +280,17 @@ open class LBXScanWrapper: NSObject,AVCaptureMetadataOutputObjectsDelegate {
         setTorch(torch: torch)
     }
     
+    ///调整焦距
+    open func adjustFocal(value:CGFloat){
+        let videoConnection:AVCaptureConnection = (self.stillImageOutput.connection(with: .video))!
+        self.previewLayer?.setAffineTransform(CGAffineTransform(scaleX: 1+value, y: 1+value))
+        do {
+            try self.input?.device.lockForConfiguration()
+        } catch {}
+        videoConnection.videoScaleAndCropFactor = 1+value
+        self.input?.device.unlockForConfiguration()
+    }
+    
     //MARK: ------获取系统默认支持的码的类型
     static func defaultMetaDataObjectTypes() -> [AVMetadataObject.ObjectType] {
         var types =
diff --git a/swiftScan/QQScanViewController.swift b/swiftScan/QQScanViewController.swift
index 777c363..05379dc 100644
--- a/swiftScan/QQScanViewController.swift
+++ b/swiftScan/QQScanViewController.swift
@@ -19,6 +19,11 @@ class QQScanViewController: LBXScanViewController {
      @brief  闪关灯开启状态
      */
     var isOpenedFlash: Bool = false
+    
+    /**
+     @brief  缩放倍数
+     */
+    var scale:CGFloat = 0
 
 // MARK: - 底部几个功能：开启闪光灯、相册、我的二维码
 
@@ -114,6 +119,10 @@ class QQScanViewController: LBXScanViewController {
         bottomItemsView?.addSubview(btnMyQR)
 
         view.addSubview(bottomItemsView!)
+        
+        //此处通过手势调整
+        let pinchGest:UIPinchGestureRecognizer = UIPinchGestureRecognizer.init(target: self, action: #selector(handlePinches(pinchGest:)))
+        self.view.addGestureRecognizer(pinchGest)
     }
     
     //开关闪光灯
@@ -137,5 +146,22 @@ class QQScanViewController: LBXScanViewController {
         let vc = MyCodeViewController()
         self.navigationController?.pushViewController(vc, animated: true)
     }
+    
+    @objc func handlePinches(pinchGest:UIPinchGestureRecognizer){
+        
+        var currentScale:CGFloat = self.scale + pinchGest.scale - 1.0;
+        if (currentScale > 2) {
+            currentScale = 2;
+        }
+        if (currentScale < 0) {
+            currentScale = 0;
+        }
+        //调整焦距缩放倍数
+        scanObj?.adjustFocal(value: currentScale)
+        
+        if pinchGest.state == .ended || pinchGest.state == .cancelled{
+            self.scale = currentScale
+        }
+    }
 
 }