diff --git a/iOS/Example/Example.xcodeproj/project.pbxproj b/iOS/Example/Example.xcodeproj/project.pbxproj
index 66134c6b..ccd4467c 100644
--- a/iOS/Example/Example.xcodeproj/project.pbxproj
+++ b/iOS/Example/Example.xcodeproj/project.pbxproj
@@ -10,6 +10,7 @@
 		AAAF5D5802FC6E7E4F481F5D /* libPods-ExampleTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 942158E9B500A4C975FD37F3 /* libPods-ExampleTests.a */; };
 		B1AF6AE00A9B4675290F5947 /* libPods-ExampleUITests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 64B9242B26FEC4AEC20FF43D /* libPods-ExampleUITests.a */; };
 		D751D4B065D8D4FA6594B5EE /* DemoVC.m in Sources */ = {isa = PBXBuildFile; fileRef = D751D19E97EF4EDD7588FEBE /* DemoVC.m */; };
+		D751D4FCC0A2322211DE3D55 /* QRScanViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = D751DA399F1ADB6D34563B5D /* QRScanViewController.m */; };
 		D9E087DE6FF1DB083B30D9E7 /* libPods-Example.a in Frameworks */ = {isa = PBXBuildFile; fileRef = C043B7BA79339ABA1CF46881 /* libPods-Example.a */; };
 		E2334AF022E9D2060098A085 /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = E2334AEF22E9D2060098A085 /* AppDelegate.m */; };
 		E2334AF322E9D2060098A085 /* ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = E2334AF222E9D2060098A085 /* ViewController.m */; };
@@ -49,7 +50,9 @@
 		942158E9B500A4C975FD37F3 /* libPods-ExampleTests.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-ExampleTests.a"; sourceTree = BUILT_PRODUCTS_DIR; };
 		A5AE090AE3815360EC768C8D /* Pods-Example.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Example.release.xcconfig"; path = "Pods/Target Support Files/Pods-Example/Pods-Example.release.xcconfig"; sourceTree = "<group>"; };
 		C043B7BA79339ABA1CF46881 /* libPods-Example.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = "libPods-Example.a"; sourceTree = BUILT_PRODUCTS_DIR; };
+		D751D18AD6496F4A9BE1AB45 /* QRScanViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = QRScanViewController.h; sourceTree = "<group>"; };
 		D751D19E97EF4EDD7588FEBE /* DemoVC.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = DemoVC.m; sourceTree = "<group>"; };
+		D751DA399F1ADB6D34563B5D /* QRScanViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = QRScanViewController.m; sourceTree = "<group>"; };
 		D751DDEC114E037231257E64 /* DemoVC.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = DemoVC.h; sourceTree = "<group>"; };
 		E2334AEB22E9D2060098A085 /* Doric Playground.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "Doric Playground.app"; sourceTree = BUILT_PRODUCTS_DIR; };
 		E2334AEE22E9D2060098A085 /* AppDelegate.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = AppDelegate.h; sourceTree = "<group>"; };
@@ -158,6 +161,8 @@
 				E2334AFD22E9D2070098A085 /* main.m */,
 				D751D19E97EF4EDD7588FEBE /* DemoVC.m */,
 				D751DDEC114E037231257E64 /* DemoVC.h */,
+				D751DA399F1ADB6D34563B5D /* QRScanViewController.m */,
+				D751D18AD6496F4A9BE1AB45 /* QRScanViewController.h */,
 			);
 			path = Example;
 			sourceTree = "<group>";
@@ -424,6 +429,7 @@
 				E2334AFE22E9D2070098A085 /* main.m in Sources */,
 				E2334AF022E9D2060098A085 /* AppDelegate.m in Sources */,
 				D751D4B065D8D4FA6594B5EE /* DemoVC.m in Sources */,
+				D751D4FCC0A2322211DE3D55 /* QRScanViewController.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/iOS/Example/Example/DemoVC.m b/iOS/Example/Example/DemoVC.m
index 2c142ac6..38e215e1 100644
--- a/iOS/Example/Example/DemoVC.m
+++ b/iOS/Example/Example/DemoVC.m
@@ -26,6 +26,7 @@ - (instancetype)initWithPath:(NSString *)filePath {
 
 - (void)viewDidLoad {
     self.title = self.filePath;
+    self.view.backgroundColor = [UIColor whiteColor];
     NSString *path = [[NSBundle mainBundle] bundlePath];
     NSString *demoPath = [path stringByAppendingPathComponent:@"demo"];
     NSString *fullPath = [demoPath stringByAppendingPathComponent:self.filePath];
diff --git a/iOS/Example/Example/Info.plist b/iOS/Example/Example/Info.plist
index f3caaf95..dc0608e9 100644
--- a/iOS/Example/Example/Info.plist
+++ b/iOS/Example/Example/Info.plist
@@ -2,6 +2,8 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>NSCameraUsageDescription</key>
+	<string>Scan QR Code</string>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
 	<key>CFBundleExecutable</key>
diff --git a/iOS/Example/Example/QRScanViewController.h b/iOS/Example/Example/QRScanViewController.h
new file mode 100644
index 00000000..05ffa4e6
--- /dev/null
+++ b/iOS/Example/Example/QRScanViewController.h
@@ -0,0 +1,10 @@
+//
+// Created by pengfei.zhou on 2019/11/21.
+// Copyright (c) 2019 pengfei.zhou. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+
+@interface QRScanViewController : UIViewController
+@end
\ No newline at end of file
diff --git a/iOS/Example/Example/QRScanViewController.m b/iOS/Example/Example/QRScanViewController.m
new file mode 100644
index 00000000..b6baedca
--- /dev/null
+++ b/iOS/Example/Example/QRScanViewController.m
@@ -0,0 +1,93 @@
+//
+// Created by pengfei.zhou on 2019/11/21.
+// Copyright (c) 2019 pengfei.zhou. All rights reserved.
+//
+
+#import "QRScanViewController.h"
+#import <AVFoundation/AVFoundation.h>
+#import "Doric.h"
+
+@interface QRScanViewController () <AVCaptureMetadataOutputObjectsDelegate>
+@property(strong, nonatomic) AVCaptureDevice *device;
+@property(strong, nonatomic) AVCaptureDeviceInput *input;
+@property(strong, nonatomic) AVCaptureMetadataOutput *output;
+@property(strong, nonatomic) AVCaptureSession *session;
+@property(strong, nonatomic) AVCaptureVideoPreviewLayer *previewLayer;
+@property(strong, nonatomic) UIPinchGestureRecognizer *pinchGes;
+@property(assign, nonatomic) CGFloat scanRegion_W;
+@property(assign, nonatomic) CGFloat initScale;
+@end
+
+@implementation QRScanViewController
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.title = @"扫一扫";
+    [self configBasicDevice];
+    [self configPinchGes];
+    [self.session startRunning];
+}
+
+- (void)configBasicDevice {
+    self.device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
+    self.input = [[AVCaptureDeviceInput alloc] initWithDevice:self.device error:nil];
+    self.output = [[AVCaptureMetadataOutput alloc] init];
+    [self.output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()];
+    self.session = [[AVCaptureSession alloc] init];
+    [self.session setSessionPreset:AVCaptureSessionPresetHigh];
+    if ([self.session canAddInput:self.input]) {
+        [self.session addInput:self.input];
+    }
+    if ([self.session canAddOutput:self.output]) {
+        [self.session addOutput:self.output];
+    }
+    [self.output setMetadataObjectTypes:@[AVMetadataObjectTypeQRCode]];
+    [self.output setRectOfInterest:CGRectMake(0, 0, 1, 1)];
+    self.previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.session];
+    self.previewLayer.frame = CGRectMake(0, 0, self.view.width, self.view.height);
+    self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
+    [self.view.layer addSublayer:self.previewLayer];
+}
+
+- (void)configPinchGes {
+    self.pinchGes = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchDetected:)];
+    [self.view addGestureRecognizer:self.pinchGes];
+}
+
+- (void)pinchDetected:(UIPinchGestureRecognizer *)recogniser {
+    if (!_device) {
+        return;
+    }
+    if (recogniser.state == UIGestureRecognizerStateBegan) {
+        _initScale = _device.videoZoomFactor;
+    }
+    NSError *error = nil;
+    [_device lockForConfiguration:&error];
+    if (!error) {
+        CGFloat zoomFactor;
+        CGFloat scale = recogniser.scale;
+        if (scale < 1.0f) {
+            zoomFactor = self.initScale - pow(self.device.activeFormat.videoMaxZoomFactor, 1.0f - recogniser.scale);
+        } else {
+            zoomFactor = self.initScale + pow(self.device.activeFormat.videoMaxZoomFactor, (recogniser.scale - 1.0f) / 2.0f);
+        }
+        zoomFactor = MIN(15.0f, zoomFactor);
+        zoomFactor = MAX(1.0f, zoomFactor);
+        _device.videoZoomFactor = zoomFactor;
+        [_device unlockForConfiguration];
+    }
+}
+
+#pragma mark - AVCaptureMetadataOutputObjectsDelegate
+
+- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection {
+    [self.session stopRunning];
+    if ([metadataObjects count] >= 1) {
+        AVMetadataMachineReadableCodeObject *qrObject = [metadataObjects lastObject];
+        NSString *result = qrObject.stringValue;
+        NSLog(@"Scan result is %@", result);
+        [[DoricDriver instance] connectDevKit:[NSString stringWithFormat:@"ws://%@:7777", result]];
+        showToast([NSString stringWithFormat:@"Connected to %@", result], BOTTOM);
+        [self.navigationController popViewControllerAnimated:NO];
+    }
+}
+@end
\ No newline at end of file
diff --git a/iOS/Example/Example/ViewController.m b/iOS/Example/Example/ViewController.m
index 27231476..8acce53f 100644
--- a/iOS/Example/Example/ViewController.m
+++ b/iOS/Example/Example/ViewController.m
@@ -9,6 +9,7 @@
 #import "ViewController.h"
 #import "Doric.h"
 #import "DemoVC.h"
+#import "QRScanViewController.h"
 
 @interface ViewController () <UITableViewDelegate, UITableViewDataSource>
 @property(nonatomic, copy) NSArray <NSString *> *demoFilePaths;
@@ -25,6 +26,9 @@ - (void)viewDidLoad {
     self.demoFilePaths = [[mgr subpathsAtPath:demoPath] filter:^BOOL(NSString *obj) {
         return ![obj containsString:@".map"];
     }];
+    NSMutableArray <NSString *> *tmp = [self.demoFilePaths mutableCopy];
+    [tmp insertObject:@"Dev Kit" atIndex:0];
+    self.demoFilePaths = tmp;
     [self.view addSubview:[[UITableView new] also:^(UITableView *it) {
         it.width = self.view.width;
         it.height = self.view.height;
@@ -50,6 +54,10 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
 }
 
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
+    if (indexPath.row == 0) {
+        [self.navigationController pushViewController:[QRScanViewController new] animated:NO];
+        return;
+    }
     DemoVC *demoVC = [[DemoVC alloc] initWithPath:self.demoFilePaths[(NSUInteger) indexPath.row]];
     [self.navigationController pushViewController:demoVC animated:NO];
 }
diff --git a/iOS/Pod/Classes/Doric.h b/iOS/Pod/Classes/Doric.h
index 9a2236dc..21adbf24 100644
--- a/iOS/Pod/Classes/Doric.h
+++ b/iOS/Pod/Classes/Doric.h
@@ -19,3 +19,4 @@
 #import "DoricViewNode.h"
 #import "DoricRootNode.h"
 #import "UIView+Doric.h"
+#import "DoricUtil.h"
\ No newline at end of file