Swift 4 update

Author: Andrew Lloyd

KeyboardHelper.xcodeproj/project.pbxproj

@@ -189,11 +189,11 @@
 				TargetAttributes = {
 					275BCA761C57C9F800FF3647 = {
 						CreatedOnToolsVersion = 7.2;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 0900;
 					};
 					275BCA801C57C9F800FF3647 = {
 						CreatedOnToolsVersion = 7.2;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 0900;
 					};
 				};
 			};
@@ -368,7 +368,8 @@
 				SKIP_INSTALL = YES;
 				SWIFT_OBJC_INTERFACE_HEADER_NAME = "$(SWIFT_MODULE_NAME)-Swift.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = On;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -387,7 +388,8 @@
 				SKIP_INSTALL = YES;
 				SWIFT_OBJC_INTERFACE_HEADER_NAME = "$(SWIFT_MODULE_NAME)-Swift.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = On;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};
@@ -398,7 +400,8 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.nodes.KeyboardHelperTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = On;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -410,7 +413,8 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.nodes.KeyboardHelperTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = On;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};

KeyboardHelper/Classes/KeyboardHelper.swift

@@ -55,12 +55,12 @@ public class KeyboardHelper {
         delegate = nil
     }
 
-    dynamic private func keyboardWillAppear(_ note: Notification) {
+    @objc dynamic private func keyboardWillAppear(_ note: Notification) {
         let info = KeyboardAppearanceInfo(notification: note)
         self.delegate?.keyboardWillAppear(info)
     }
 
-    dynamic private func keyboardWillDisappear(_ note: Notification) {
+    @objc dynamic private func keyboardWillDisappear(_ note: Notification) {
         let info = KeyboardAppearanceInfo(notification: note)
         self.delegate?.keyboardWillDisappear(info)
     }