From 4664b5b8885562cb2a14c5dcb3df4fc07bf960ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E2=80=9Cbill=2Echan=E2=80=9D?= <“bill.chan@ums.ag”>
Date: Thu, 16 Apr 2015 10:31:17 +0200
Subject: [PATCH 1/3] New function for getting image size and QR code version.
 + (UIImage *)mdQRCodeForString:(NSString *)qrString size:(CGFloat)imageSize
 fillColor:(UIColor *)fillColor :(int *)width :(int *)version;

---
 QRCode/QR/UIImage+MDQRCode.h |  2 +-
 QRCode/QR/UIImage+MDQRCode.m | 48 ++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 1 deletion(-)

diff --git a/QRCode/QR/UIImage+MDQRCode.h b/QRCode/QR/UIImage+MDQRCode.h
index 052b4e3..485b0d7 100644
--- a/QRCode/QR/UIImage+MDQRCode.h
+++ b/QRCode/QR/UIImage+MDQRCode.h
@@ -33,6 +33,6 @@
  */
 + (UIImage *)mdQRCodeForString:(NSString *)qrString size:(CGFloat)size;
 + (UIImage *)mdQRCodeForString:(NSString *)qrString size:(CGFloat)size fillColor:(UIColor *)fillColor;
-
++ (UIImage *)mdQRCodeForString:(NSString *)qrString size:(CGFloat)imageSize fillColor:(UIColor *)fillColor :(int *)width :(int *)version;
 
 @end
diff --git a/QRCode/QR/UIImage+MDQRCode.m b/QRCode/QR/UIImage+MDQRCode.m
index 01d9dcf..7f5a102 100644
--- a/QRCode/QR/UIImage+MDQRCode.m
+++ b/QRCode/QR/UIImage+MDQRCode.m
@@ -106,4 +106,52 @@ + (UIImage *)mdQRCodeForString:(NSString *)qrString size:(CGFloat)imageSize fill
 	return qrImage;
 }
 
++ (UIImage *)mdQRCodeForString:(NSString *)qrString size:(CGFloat)imageSize fillColor:(UIColor *)fillColor :(int *)width :(int *)version
+{
+    if (0 == [qrString length]) {
+        return nil;
+    }
+    
+    // generate QR
+    QRcode *code = QRcode_encodeString([qrString UTF8String], 0, QR_ECLEVEL_L, QR_MODE_8, 1);
+    if (!code) {
+        return nil;
+    }
+    
+    CGFloat size = imageSize * [[UIScreen mainScreen] scale];
+    
+    *width = code->width;
+    *version = code->version;
+
+    if (code->width > size) {
+        printf("Image size is less than qr code size (%d)\n", code->width);
+        return nil;
+    }
+    
+    // create context
+    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
+    
+    // The constants for specifying the alpha channel information are declared with the CGImageAlphaInfo type but can be passed to this parameter safely.
+    
+    CGContextRef ctx = CGBitmapContextCreate(0, size, size, 8, size * 4, colorSpace, (CGBitmapInfo)kCGImageAlphaPremultipliedLast);
+    
+    CGAffineTransform translateTransform = CGAffineTransformMakeTranslation(0, -size);
+    CGAffineTransform scaleTransform = CGAffineTransformMakeScale(1, -1);
+    CGContextConcatCTM(ctx, CGAffineTransformConcat(translateTransform, scaleTransform));
+    
+    // draw QR on this context
+    [self mdDrawQRCode:code context:ctx size:size fillColor:fillColor];
+    
+    // get image
+    CGImageRef qrCGImage = CGBitmapContextCreateImage(ctx);
+    UIImage * qrImage = [UIImage imageWithCGImage:qrCGImage];
+    
+    // free memory
+    CGContextRelease(ctx);
+    CGImageRelease(qrCGImage);
+    CGColorSpaceRelease(colorSpace);
+    QRcode_free(code);
+    return qrImage;
+}
+
 @end

From da2420602d8e8bb41e002be6bdd134bc573026e1 Mon Sep 17 00:00:00 2001
From: Alex Zarochintsev <alex.zarochintsev@icloud.com>
Date: Wed, 13 May 2015 15:26:15 +0300
Subject: [PATCH 2/3] Create .podspec file

---
 QRCodeEncoder.podspec | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 QRCodeEncoder.podspec

diff --git a/QRCodeEncoder.podspec b/QRCodeEncoder.podspec
new file mode 100644
index 0000000..76ca0d4
--- /dev/null
+++ b/QRCodeEncoder.podspec
@@ -0,0 +1,15 @@
+Pod::Spec.new do |s|
+    s.name            = 'QRCodeEncoder'
+    s.version         = '1.0'
+    s.platform        = :ios, '7.0'
+    s.license         = { :type => 'MIT', :file => 'LICENSE' }
+    s.summary         = 'QRCode Encoder For Your iOS app.'
+    s.homepage        = 'https://github.com/Notan/ios-qr-code-encoder'
+    s.authors         = { 'Alex Zarochintsev' => 'alex.zarochintsev@icloud.com' }
+    s.source          = { :git => 'https://github.com/Notan/ios-qr-code-encoder', :tag => "1.0" }
+
+    s.source_files = 'QRCode/QR/**/*.{h,m,c}'
+
+    s.framework       = 'Foundation', 'UIKit'
+    s.requires_arc    = true
+end
\ No newline at end of file

From 15614c213e3c5887ea702bb22deafddfe172206e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E2=80=9Cbill=2Echan=E2=80=9D?= <“bill.chan@ums.ag”>
Date: Fri, 5 Jun 2015 12:16:51 +0200
Subject: [PATCH 3/3] allow nil for parameter returning

---
 QRCode/QR/UIImage+MDQRCode.m | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/QRCode/QR/UIImage+MDQRCode.m b/QRCode/QR/UIImage+MDQRCode.m
index 7f5a102..e77c444 100644
--- a/QRCode/QR/UIImage+MDQRCode.m
+++ b/QRCode/QR/UIImage+MDQRCode.m
@@ -120,8 +120,14 @@ + (UIImage *)mdQRCodeForString:(NSString *)qrString size:(CGFloat)imageSize fill
     
     CGFloat size = imageSize * [[UIScreen mainScreen] scale];
     
+    if(width)
+    {
     *width = code->width;
+    }
+    if(version)
+    {
     *version = code->version;
+    }
 
     if (code->width > size) {
         printf("Image size is less than qr code size (%d)\n", code->width);