Updated for swift 4.2.

Author: DimaMishchenko

UIImage+PDF/UIImage+PDF.swift

@@ -124,7 +124,7 @@ extension UIImage {
 
         guard
             let image = imageFromContext,
-            let imageData = UIImagePNGRepresentation(image),
+            let imageData = image.pngData(),
             let cgImage = image.cgImage
         else { return nil }
 

UIImagePlusPDF.xcodeproj/project.pbxproj

@@ -317,6 +317,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -370,6 +371,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				SWIFT_VERSION = 4.2;
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;
@@ -387,7 +389,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.dima.uiimage.pdf.UIImagePlusPDF;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -405,7 +407,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.dima.uiimage.pdf.UIImagePlusPDF;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;
@@ -425,7 +427,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.dima.uiimage.pdf.UIImagePlusPDFTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/UIImagePlusPDF.app/UIImagePlusPDF";
 			};
@@ -446,7 +448,7 @@
 				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.dima.uiimage.pdf.UIImagePlusPDFTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/UIImagePlusPDF.app/UIImagePlusPDF";
 			};

UIImagePlusPDF/AppDelegate.swift

@@ -14,7 +14,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     var window: UIWindow?
 
 
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
         // Override point for customization after application launch.
         return true
     }