├── Demo-CustomQRCore.xcodeproj
    ├── project.pbxproj
    └── project.xcworkspace
    │   └── contents.xcworkspacedata
├── Demo-CustomQRCore
    ├── AppDelegate.h
    ├── AppDelegate.m
    ├── Base.lproj
    │   └── Main.storyboard
    ├── Images.xcassets
    │   ├── AppIcon.appiconset
    │   │   └── Contents.json
    │   └── LaunchImage.launchimage
    │   │   └── Contents.json
    ├── Info.plist
    ├── ViewController.h
    ├── ViewController.m
    └── main.m
├── Demo-CustomQRCoreTests
    ├── Demo_CustomQRCoreTests.m
    └── Info.plist
├── README.md
└── ScreenShot.png


/Demo-CustomQRCore.xcodeproj/project.pbxproj:
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--------------------------------------------------------------------------------
/Demo-CustomQRCore.xcodeproj/project.xcworkspace/contents.xcworkspacedata:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <Workspace
3 |    version = "1.0">
4 |    <FileRef
5 |       location = "self:Demo-CustomQRCore.xcodeproj">
6 |    </FileRef>
7 | </Workspace>
8 | 


--------------------------------------------------------------------------------
/Demo-CustomQRCore/AppDelegate.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.h
 3 | //  Demo-CustomQRCore
 4 | //
 5 | //  Created by YourtionGuo on 6/5/14.
 6 | //  Copyright (c) 2014 yourtion. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface AppDelegate : UIResponder <UIApplicationDelegate>
12 | 
13 | @property (strong, nonatomic) UIWindow *window;
14 | 
15 | 
16 | @end
17 | 
18 | 


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/Demo-CustomQRCore/AppDelegate.m:
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 1 | //
 2 | //  AppDelegate.m
 3 | //  Demo-CustomQRCore
 4 | //
 5 | //  Created by YourtionGuo on 6/5/14.
 6 | //  Copyright (c) 2014 yourtion. All rights reserved.
 7 | //
 8 | 
 9 | #import "AppDelegate.h"
10 | 
11 | @interface AppDelegate ()
12 |             
13 | 
14 | @end
15 | 
16 | @implementation AppDelegate
17 |             
18 | 
19 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
20 |     // Override point for customization after application launch.
21 |     return YES;
22 | }
23 | 
24 | - (void)applicationWillResignActive:(UIApplication *)application {
25 |     // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
26 |     // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
27 | }
28 | 
29 | - (void)applicationDidEnterBackground:(UIApplication *)application {
30 |     // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
31 |     // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
32 | }
33 | 
34 | - (void)applicationWillEnterForeground:(UIApplication *)application {
35 |     // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
36 | }
37 | 
38 | - (void)applicationDidBecomeActive:(UIApplication *)application {
39 |     // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
40 | }
41 | 
42 | - (void)applicationWillTerminate:(UIApplication *)application {
43 |     // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
44 | }
45 | 
46 | @end
47 | 


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/Demo-CustomQRCore/Base.lproj/Main.storyboard:
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 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6154.17" systemVersion="14A238x" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="vXZ-lx-hvc">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6153.11"/>
 5 |     </dependencies>
 6 |     <scenes>
 7 |         <!--View Controller-->
 8 |         <scene sceneID="ufC-wZ-h7g">
 9 |             <objects>
10 |                 <viewController id="vXZ-lx-hvc" customClass="ViewController" sceneMemberID="viewController">
11 |                     <layoutGuides>
12 |                         <viewControllerLayoutGuide type="top" id="jyV-Pf-zRb"/>
13 |                         <viewControllerLayoutGuide type="bottom" id="2fi-mo-0CV"/>
14 |                     </layoutGuides>
15 |                     <view key="view" contentMode="scaleToFill" id="kh9-bI-dsS">
16 |                         <rect key="frame" x="0.0" y="0.0" width="320" height="568"/>
17 |                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
18 |                         <subviews>
19 |                             <imageView appearanceType="aqua" userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" translatesAutoresizingMaskIntoConstraints="NO" id="ako-be-6eX">
20 |                                 <rect key="frame" x="35" y="159" width="250" height="250"/>
21 |                                 <constraints>
22 |                                     <constraint firstAttribute="width" constant="250" id="Bax-tS-h3g"/>
23 |                                     <constraint firstAttribute="height" constant="250" id="r20-ru-DHK"/>
24 |                                 </constraints>
25 |                             </imageView>
26 |                         </subviews>
27 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
28 |                         <constraints>
29 |                             <constraint firstAttribute="centerY" secondItem="ako-be-6eX" secondAttribute="centerY" id="vpN-1q-Fl5"/>
30 |                             <constraint firstAttribute="centerX" secondItem="ako-be-6eX" secondAttribute="centerX" id="ynA-oz-2R3"/>
31 |                         </constraints>
32 |                     </view>
33 |                     <simulatedOrientationMetrics key="simulatedOrientationMetrics"/>
34 |                     <simulatedScreenMetrics key="simulatedDestinationMetrics" type="retina4"/>
35 |                     <connections>
36 |                         <outlet property="qrcodeView" destination="ako-be-6eX" id="8PH-Mf-N12"/>
37 |                     </connections>
38 |                 </viewController>
39 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="x5A-6p-PRh" sceneMemberID="firstResponder"/>
40 |             </objects>
41 |         </scene>
42 |     </scenes>
43 | </document>
44 | 


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/Demo-CustomQRCore/Images.xcassets/AppIcon.appiconset/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "idiom" : "iphone",
 5 |       "size" : "29x29",
 6 |       "scale" : "2x"
 7 |     },
 8 |     {
 9 |       "idiom" : "iphone",
10 |       "size" : "40x40",
11 |       "scale" : "2x"
12 |     },
13 |     {
14 |       "idiom" : "iphone",
15 |       "size" : "60x60",
16 |       "scale" : "2x"
17 |     }
18 |   ],
19 |   "info" : {
20 |     "version" : 1,
21 |     "author" : "xcode"
22 |   }
23 | }


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/Demo-CustomQRCore/Images.xcassets/LaunchImage.launchimage/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "orientation" : "portrait",
 5 |       "idiom" : "iphone",
 6 |       "extent" : "full-screen",
 7 |       "minimum-system-version" : "7.0",
 8 |       "scale" : "2x"
 9 |     },
10 |     {
11 |       "orientation" : "portrait",
12 |       "idiom" : "iphone",
13 |       "subtype" : "retina4",
14 |       "extent" : "full-screen",
15 |       "minimum-system-version" : "7.0",
16 |       "scale" : "2x"
17 |     }
18 |   ],
19 |   "info" : {
20 |     "version" : 1,
21 |     "author" : "xcode"
22 |   }
23 | }


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/Demo-CustomQRCore/Info.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>en</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>${EXECUTABLE_NAME}</string>
 9 | 	<key>CFBundleIdentifier</key>
10 | 	<string>yourtion.${PRODUCT_NAME:rfc1034identifier}</string>
11 | 	<key>CFBundleInfoDictionaryVersion</key>
12 | 	<string>6.0</string>
13 | 	<key>CFBundleName</key>
14 | 	<string>${PRODUCT_NAME}</string>
15 | 	<key>CFBundlePackageType</key>
16 | 	<string>APPL</string>
17 | 	<key>CFBundleShortVersionString</key>
18 | 	<string>1.0</string>
19 | 	<key>CFBundleSignature</key>
20 | 	<string>????</string>
21 | 	<key>CFBundleVersion</key>
22 | 	<string>1</string>
23 | 	<key>LSRequiresIPhoneOS</key>
24 | 	<true/>
25 | 	<key>UIMainStoryboardFile</key>
26 | 	<string>Main</string>
27 | 	<key>UIRequiredDeviceCapabilities</key>
28 | 	<array>
29 | 		<string>armv7</string>
30 | 	</array>
31 | 	<key>UISupportedInterfaceOrientations</key>
32 | 	<array>
33 | 		<string>UIInterfaceOrientationPortrait</string>
34 | 	</array>
35 | </dict>
36 | </plist>
37 | 


--------------------------------------------------------------------------------
/Demo-CustomQRCore/ViewController.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  ViewController.h
 3 | //  Demo-CustomQRCore
 4 | //
 5 | //  Created by YourtionGuo on 6/5/14.
 6 | //  Copyright (c) 2014 yourtion. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface ViewController : UIViewController
12 | 
13 | 
14 | @end
15 | 
16 | 


--------------------------------------------------------------------------------
/Demo-CustomQRCore/ViewController.m:
--------------------------------------------------------------------------------
  1 | //
  2 | //  ViewController.m
  3 | //  Demo-CustomQRCore
  4 | //
  5 | //  Created by YourtionGuo on 6/5/14.
  6 | //  Copyright (c) 2014 yourtion. All rights reserved.
  7 | //
  8 | 
  9 | #import "ViewController.h"
 10 | 
 11 | @interface ViewController ()
 12 | @property (strong, nonatomic) IBOutlet UIImageView *qrcodeView;
 13 |             
 14 | 
 15 | @end
 16 | 
 17 | @implementation ViewController
 18 |             
 19 | - (void)viewDidLoad {
 20 |     [super viewDidLoad];
 21 |     // Do any additional setup after loading the view, typically from a nib.
 22 |     UIImage *qrcode = [self createNonInterpolatedUIImageFormCIImage:[self createQRForString:@"http://blog.yourtion.com"] withSize:250.0f];
 23 |     UIImage *customQrcode = [self imageBlackToTransparent:qrcode withRed:60.0f andGreen:74.0f andBlue:89.0f];
 24 |     self.qrcodeView.image = customQrcode;
 25 |     // set shadow
 26 |     self.qrcodeView.layer.shadowOffset = CGSizeMake(0, 2);
 27 |     self.qrcodeView.layer.shadowRadius = 2;
 28 |     self.qrcodeView.layer.shadowColor = [UIColor blackColor].CGColor;
 29 |     self.qrcodeView.layer.shadowOpacity = 0.5;
 30 | }
 31 | 
 32 | - (void)didReceiveMemoryWarning {
 33 |     [super didReceiveMemoryWarning];
 34 |     // Dispose of any resources that can be recreated.
 35 | }
 36 | 
 37 | #pragma mark - InterpolatedUIImage
 38 | - (UIImage *)createNonInterpolatedUIImageFormCIImage:(CIImage *)image withSize:(CGFloat) size {
 39 |     CGRect extent = CGRectIntegral(image.extent);
 40 |     CGFloat scale = MIN(size/CGRectGetWidth(extent), size/CGRectGetHeight(extent));
 41 |     // create a bitmap image that we'll draw into a bitmap context at the desired size;
 42 |     size_t width = CGRectGetWidth(extent) * scale;
 43 |     size_t height = CGRectGetHeight(extent) * scale;
 44 |     CGColorSpaceRef cs = CGColorSpaceCreateDeviceGray();
 45 |     CGContextRef bitmapRef = CGBitmapContextCreate(nil, width, height, 8, 0, cs, (CGBitmapInfo)kCGImageAlphaNone);
 46 |     CIContext *context = [CIContext contextWithOptions:nil];
 47 |     CGImageRef bitmapImage = [context createCGImage:image fromRect:extent];
 48 |     CGContextSetInterpolationQuality(bitmapRef, kCGInterpolationNone);
 49 |     CGContextScaleCTM(bitmapRef, scale, scale);
 50 |     CGContextDrawImage(bitmapRef, extent, bitmapImage);
 51 |     // Create an image with the contents of our bitmap
 52 |     CGImageRef scaledImage = CGBitmapContextCreateImage(bitmapRef);
 53 |     // Cleanup
 54 |     CGContextRelease(bitmapRef);
 55 |     CGImageRelease(bitmapImage);
 56 |     return [UIImage imageWithCGImage:scaledImage];
 57 | }
 58 | 
 59 | #pragma mark - QRCodeGenerator
 60 | - (CIImage *)createQRForString:(NSString *)qrString {
 61 |     // Need to convert the string to a UTF-8 encoded NSData object
 62 |     NSData *stringData = [qrString dataUsingEncoding:NSUTF8StringEncoding];
 63 |     // Create the filter
 64 |     CIFilter *qrFilter = [CIFilter filterWithName:@"CIQRCodeGenerator"];
 65 |     // Set the message content and error-correction level
 66 |     [qrFilter setValue:stringData forKey:@"inputMessage"];
 67 |     [qrFilter setValue:@"M" forKey:@"inputCorrectionLevel"];
 68 |     // Send the image back
 69 |     return qrFilter.outputImage;
 70 | }
 71 | 
 72 | #pragma mark - imageToTransparent
 73 | void ProviderReleaseData (void *info, const void *data, size_t size){
 74 |     free((void*)data);
 75 | }
 76 | - (UIImage*)imageBlackToTransparent:(UIImage*)image withRed:(CGFloat)red andGreen:(CGFloat)green andBlue:(CGFloat)blue{
 77 |     const int imageWidth = image.size.width;
 78 |     const int imageHeight = image.size.height;
 79 |     size_t      bytesPerRow = imageWidth * 4;
 80 |     uint32_t* rgbImageBuf = (uint32_t*)malloc(bytesPerRow * imageHeight);
 81 |     // create context
 82 |     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
 83 |     CGContextRef context = CGBitmapContextCreate(rgbImageBuf, imageWidth, imageHeight, 8, bytesPerRow, colorSpace,
 84 |                                                  kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipLast);
 85 |     CGContextDrawImage(context, CGRectMake(0, 0, imageWidth, imageHeight), image.CGImage);
 86 |     // traverse pixe
 87 |     int pixelNum = imageWidth * imageHeight;
 88 |     uint32_t* pCurPtr = rgbImageBuf;
 89 |     for (int i = 0; i < pixelNum; i++, pCurPtr++){
 90 |         if ((*pCurPtr & 0xFFFFFF00) < 0x99999900){
 91 |             // change color
 92 |             uint8_t* ptr = (uint8_t*)pCurPtr;
 93 |             ptr[3] = red; //0~255
 94 |             ptr[2] = green;
 95 |             ptr[1] = blue;
 96 |         }else{
 97 |             uint8_t* ptr = (uint8_t*)pCurPtr;
 98 |             ptr[0] = 0;
 99 |         }
100 |     }
101 |     // context to image
102 |     CGDataProviderRef dataProvider = CGDataProviderCreateWithData(NULL, rgbImageBuf, bytesPerRow * imageHeight, ProviderReleaseData);
103 |     CGImageRef imageRef = CGImageCreate(imageWidth, imageHeight, 8, 32, bytesPerRow, colorSpace,
104 |                                         kCGImageAlphaLast | kCGBitmapByteOrder32Little, dataProvider,
105 |                                         NULL, true, kCGRenderingIntentDefault);
106 |     CGDataProviderRelease(dataProvider);
107 |     UIImage* resultUIImage = [UIImage imageWithCGImage:imageRef];
108 |     // release
109 |     CGImageRelease(imageRef);
110 |     CGContextRelease(context);
111 |     CGColorSpaceRelease(colorSpace);
112 |     return resultUIImage;
113 | }
114 | @end
115 | 


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/Demo-CustomQRCore/main.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  main.m
 3 | //  Demo-CustomQRCore
 4 | //
 5 | //  Created by YourtionGuo on 6/5/14.
 6 | //  Copyright (c) 2014 yourtion. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | #import "AppDelegate.h"
11 | 
12 | int main(int argc, char * argv[]) {
13 |     @autoreleasepool {
14 |         return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
15 |     }
16 | }
17 | 


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/Demo-CustomQRCoreTests/Demo_CustomQRCoreTests.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  Demo_CustomQRCoreTests.m
 3 | //  Demo-CustomQRCoreTests
 4 | //
 5 | //  Created by YourtionGuo on 6/5/14.
 6 | //  Copyright (c) 2014 yourtion. All rights reserved.
 7 | //
 8 | 
 9 | #import <XCTest/XCTest.h>
10 | 
11 | @interface Demo_CustomQRCoreTests : XCTestCase
12 | 
13 | @end
14 | 
15 | @implementation Demo_CustomQRCoreTests
16 | 
17 | - (void)setUp {
18 |     [super setUp];
19 |     // Put setup code here. This method is called before the invocation of each test method in the class.
20 | }
21 | 
22 | - (void)tearDown {
23 |     // Put teardown code here. This method is called after the invocation of each test method in the class.
24 |     [super tearDown];
25 | }
26 | 
27 | - (void)testExample {
28 |     // This is an example of a functional test case.
29 |     XCTAssert(YES, @"Pass");
30 | }
31 | 
32 | - (void)testPerformanceExample {
33 |     // This is an example of a performance test case.
34 |     [self measureBlock:^{
35 |         // Put the code you want to measure the time of here.
36 |     }];
37 | }
38 | 
39 | @end
40 | 


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/Demo-CustomQRCoreTests/Info.plist:
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 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>en</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>${EXECUTABLE_NAME}</string>
 9 | 	<key>CFBundleIdentifier</key>
10 | 	<string>yourtion.${PRODUCT_NAME:rfc1034identifier}</string>
11 | 	<key>CFBundleInfoDictionaryVersion</key>
12 | 	<string>6.0</string>
13 | 	<key>CFBundleName</key>
14 | 	<string>${PRODUCT_NAME}</string>
15 | 	<key>CFBundlePackageType</key>
16 | 	<string>BNDL</string>
17 | 	<key>CFBundleShortVersionString</key>
18 | 	<string>1.0</string>
19 | 	<key>CFBundleSignature</key>
20 | 	<string>????</string>
21 | 	<key>CFBundleVersion</key>
22 | 	<string>1</string>
23 | </dict>
24 | </plist>
25 | 


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/README.md:
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1 | Demo-CustomQRCode
2 | =================
3 | 
4 | Demo for CustomQRCode( http://blog.yourtion.com/custom-cifilter-qrcode-generator.html )
5 | 
6 | ScreenShot:
7 | 
8 | ![](ScreenShot.png)


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/ScreenShot.png:
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https://raw.githubusercontent.com/TelenLiu/Demo_CustomQRCode/d98090202f7a3681d26377ac7a0233632cdf6588/ScreenShot.png


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