Swift 2.3 update

Author: Chris Combs

QRIO.xcodeproj/project.pbxproj

@@ -151,9 +151,11 @@
 				TargetAttributes = {
 					838FB5641D26A45E0065A950 = {
 						CreatedOnToolsVersion = 7.3.1;
+						LastSwiftMigration = 0800;
 					};
 					838FB56E1D26A45E0065A950 = {
 						CreatedOnToolsVersion = 7.3.1;
+						LastSwiftMigration = 0800;
 					};
 				};
 			};
@@ -327,6 +329,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 2.3;
 			};
 			name = Debug;
 		};
@@ -345,6 +348,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.nodes.QRIO;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 2.3;
 			};
 			name = Release;
 		};
@@ -355,6 +359,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.nodes.QRIOTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 2.3;
 			};
 			name = Debug;
 		};
@@ -365,6 +370,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.nodes.QRIOTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 2.3;
 			};
 			name = Release;
 		};

QRIO/QRIO.swift

@@ -98,7 +98,9 @@ public extension UIImage {
 
 		let qrImage = resultImage.imageByApplyingTransform(CGAffineTransformMakeScale(scaleX, scaleY))
 		let context = CIContext(options: nil)
-		let tempImage: CGImageRef = context.createCGImage(qrImage, fromRect: qrImage.extent)
-		return UIImage(CGImage: tempImage)
+		if let tempImage: CGImageRef = context.createCGImage(qrImage, fromRect: qrImage.extent) {
+			return UIImage(CGImage: tempImage)
+		}
+		return nil
 	}
 }