Update project to swift 4

compiled with xcode 9.1

.swift-version

@@ -0,0 +1 @@
+4.0

LinkLabelDemo.xcodeproj/project.pbxproj

@@ -111,12 +111,13 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0710;
-				LastUpgradeCheck = 0800;
+				LastUpgradeCheck = 0910;
 				ORGANIZATIONNAME = "Project Dent";
 				TargetAttributes = {
 					4940B3071C04BF3C000524A0 = {
 						CreatedOnToolsVersion = 7.1;
-						LastSwiftMigration = 0800;
+						DevelopmentTeam = 2Z7R9FQBNN;
+						LastSwiftMigration = 0910;
 					};
 				};
 			};
@@ -195,14 +196,20 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -230,6 +237,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -242,14 +250,20 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -270,6 +284,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 			};
@@ -280,6 +295,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
+				DEVELOPMENT_TEAM = 2Z7R9FQBNN;
 				INFOPLIST_FILE = LinkLabelDemo/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
@@ -288,7 +304,8 @@
 				SWIFT_INSTALL_OBJC_HEADER = NO;
 				SWIFT_OBJC_BRIDGING_HEADER = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -297,14 +314,16 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
+				DEVELOPMENT_TEAM = 2Z7R9FQBNN;
 				INFOPLIST_FILE = LinkLabelDemo/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = ProjectDent.LinkLabelDemo;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_INSTALL_OBJC_HEADER = NO;
 				SWIFT_OBJC_BRIDGING_HEADER = "";
-				SWIFT_VERSION = 3.0;
+				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};

LinkLabelDemo/ViewController.swift

@@ -12,41 +12,36 @@ class ViewController: UIViewController, LinkLabelInteractionDelegate {
 
     override func viewDidLoad() {
         super.viewDidLoad()
-        // Do any additional setup after loading the view, typically from a nib.
-
         self.view.backgroundColor = UIColor.white
 
         let text = "This is some text, which incidentally includes a link you may find interesting."
         let fullRange = NSMakeRange(0, (text as NSString).length)
         let linkRange = (text as NSString).range(of: "includes a link")
         let attributedString = NSMutableAttributedString(string: text)
-        attributedString.addAttribute(NSFontAttributeName, value: UIFont.systemFont(ofSize: 15), range: fullRange)
-        attributedString.addAttribute(NSForegroundColorAttributeName, value: UIColor.black, range: fullRange)
-        attributedString.addAttribute(NSLinkAttributeName, value: URL(string: "https://google.com")!, range: linkRange)
+        attributedString.addAttribute(.font, value: UIFont.systemFont(ofSize: 15), range: fullRange)
+        attributedString.addAttribute(.foregroundColor, value: UIColor.black, range: fullRange)
+        attributedString.addAttribute(.link, value: URL(string: "https://google.com")!, range: linkRange)
 
-        let linkTextAttributes = [
-            NSUnderlineStyleAttributeName: NSNumber(value: NSUnderlineStyle.styleSingle.rawValue as Int),
-            NSForegroundColorAttributeName: UIColor.green
+        let linkTextAttributes: [NSAttributedStringKey: AnyObject] = [
+            NSAttributedStringKey.underlineStyle: NSNumber(value: NSUnderlineStyle.styleSingle.rawValue as Int),
+            NSAttributedStringKey.foregroundColor: UIColor.green
         ]
 
-        let highlightedLinkTextAttributes = [
-            NSUnderlineStyleAttributeName: NSNumber(value: NSUnderlineStyle.styleSingle.rawValue as Int),
-            NSForegroundColorAttributeName: UIColor.red
+        let highlightedLinkTextAttributes: [NSAttributedStringKey: AnyObject] = [
+            .underlineStyle: NSNumber(value: NSUnderlineStyle.styleSingle.rawValue as Int),
+            .foregroundColor: UIColor.red
         ]
 
         let label = LinkLabel()
+        label.backgroundColor = UIColor.yellow
         label.numberOfLines = 0 // Infinite lines
         label.attributedText = attributedString
         label.linkTextAttributes = linkTextAttributes
         label.highlightedLinkTextAttributes = highlightedLinkTextAttributes
         label.interactionDelegate = self
         label.frame = CGRect(x: 20, y: 20, width: 280, height: 400)
-        self.view.addSubview(label)
-    }
 
-    override func didReceiveMemoryWarning() {
-        super.didReceiveMemoryWarning()
-        // Dispose of any resources that can be recreated.
+        self.view.addSubview(label)
     }
 
     //MARK: LinkLabelInteractionDelegate

Source/LinkLabel.swift

@@ -59,6 +59,10 @@ private class LinkAttribute {
     }
 }
 
+extension NSAttributedStringKey {
+    // static NSAttributedStringKey
+}
+
 public protocol LinkLabelInteractionDelegate: class {
     func linkLabelDidSelectLink(linkLabel: LinkLabel, url: URL)
 }
@@ -69,14 +73,14 @@ open class LinkLabel: UILabel, UIGestureRecognizerDelegate {
 
     fileprivate var standardTextAttributes: Array<Attribute> = []
 
-    open var linkTextAttributes: Dictionary<String, AnyObject> {
+    open var linkTextAttributes: Dictionary<NSAttributedStringKey, AnyObject> {
         didSet {
             self.setupAttributes()
         }
     }
 
     //Text attributes displayed when a link has been highlighted
-    open var highlightedLinkTextAttributes: Dictionary<String, AnyObject> {
+    open var highlightedLinkTextAttributes: Dictionary<NSAttributedStringKey, AnyObject> {
         didSet {
             self.setupAttributes()
         }
@@ -109,13 +113,13 @@ open class LinkLabel: UILabel, UIGestureRecognizerDelegate {
 
                 self.attributedText!.enumerateAttributes(in: range, options: [], using: { (attributes, range, _) in
                     for attribute in attributes {
-                        if attribute.key == NSLinkAttributeName {
+                        if attribute.key == .link {
                             if attribute.value is URL {
                                 let linkAttribute = LinkAttribute(url: attribute.value as! URL, range: range)
                                 linkAttributes.append(linkAttribute)
                             }
                         } else {
-                            let attribute = Attribute(attributeName: attribute.key, value: attribute.value as AnyObject, range: range)
+                            let attribute = Attribute(attributeName: attribute.key.rawValue, value: attribute.value as AnyObject, range: range)
                             standardAttributes.append(attribute)
                         }
                     }
@@ -138,10 +142,12 @@ open class LinkLabel: UILabel, UIGestureRecognizerDelegate {
 
     override public init(frame: CGRect) {
         linkTextAttributes = [
-            NSUnderlineStyleAttributeName: NSNumber(value: NSUnderlineStyle.styleSingle.rawValue as Int)]
+            .underlineStyle: NSNumber(value: NSUnderlineStyle.styleSingle.rawValue as Int)
+        ]
 
         highlightedLinkTextAttributes = [
-            NSUnderlineStyleAttributeName: NSNumber(value: NSUnderlineStyle.styleSingle.rawValue as Int)]
+            .underlineStyle: NSNumber(value: NSUnderlineStyle.styleSingle.rawValue as Int)
+        ]
 
         super.init(frame: frame)
 
@@ -179,7 +185,7 @@ open class LinkLabel: UILabel, UIGestureRecognizerDelegate {
         return nil
     }
 
-    func respondToLinkLabelTouched(_ gestureRecognizer: TouchGestureRecognizer) {
+    @objc func respondToLinkLabelTouched(_ gestureRecognizer: TouchGestureRecognizer) {
         if self.linkAttributes.count == 0 {
             return
         }
@@ -205,7 +211,7 @@ open class LinkLabel: UILabel, UIGestureRecognizerDelegate {
 
     }
 
-    func respondToLinkLabelTapped(_ gestureRecognizer: UITapGestureRecognizer) {
+    @objc func respondToLinkLabelTapped(_ gestureRecognizer: UITapGestureRecognizer) {
         if self.linkAttributes.count == 0 {
             return
         }
@@ -234,17 +240,21 @@ open class LinkLabel: UILabel, UIGestureRecognizerDelegate {
         mutableAttributedText.removeAttributes()
 
         for attribute in self.standardTextAttributes {
-            mutableAttributedText.addAttribute(attribute.attributeName, value: attribute.value, range: attribute.range)
+            mutableAttributedText.addAttribute(
+                NSAttributedStringKey(rawValue: attribute.attributeName),
+                value: attribute.value,
+                range: attribute.range
+            )
         }
 
         for linkAttribute in self.linkAttributes {
             if linkAttribute === self.highlightedLinkAttribute {
-                for (attributeName, value): (String, AnyObject) in self.highlightedLinkTextAttributes {
-                    mutableAttributedText.addAttribute(attributeName, value: value, range: linkAttribute.range)
+                for (attribute, value) in self.highlightedLinkTextAttributes {
+                    mutableAttributedText.addAttribute(attribute, value: value, range: linkAttribute.range)
                 }
             } else {
-                for (attributeName, value): (String, AnyObject) in self.linkTextAttributes {
-                    mutableAttributedText.addAttribute(attributeName, value: value, range: linkAttribute.range)
+                for (attribute, value)in self.linkTextAttributes {
+                    mutableAttributedText.addAttribute(attribute, value: value, range: linkAttribute.range)
                 }
             }
         }

Source/NSMutableAttributedString+RemoveAttributes.swift

@@ -15,8 +15,7 @@ extension NSMutableAttributedString {
     }
 
     func removeAttributes(range: NSRange) {
-        self.enumerateAttributes(in: range, options: []) {
-            (attributes: [String: Any], range: NSRange, _) in
+        self.enumerateAttributes(in: range, options: []) { (attributes, range, _) in
             for attribute in attributes {
                 self.removeAttribute(attribute.key, range: range)
             }