Update example to Swift 3

Author: Jose Alcalá Correa

Example/Example.xcodeproj/project.pbxproj

@@ -564,7 +564,7 @@
 				PROVISIONING_PROFILE = "";
 				SWIFT_OBJC_BRIDGING_HEADER = "GSKStretchyHeaderView/Example-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 2.3;
+				SWIFT_VERSION = 3.0;
 				WRAPPER_EXTENSION = app;
 			};
 			name = Debug;

Example/GSKStretchyHeaderView/ScalableLabelHeaderView.swift

@@ -6,11 +6,11 @@ class ScalableLabelHeaderView: GSKStretchyHeaderView {
 
     private lazy var label: UILabel = {
         let label = UILabel(frame: CGRect(x: 0, y: 20, width: self.contentView.width, height: self.contentView.height - 20))
-        label.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]
-        label.font = UIFont.monospacedDigitSystemFontOfSize(self.maxFontSize, weight: UIFontWeightMedium)
-        label.textColor = UIColor.darkGrayColor()
+        label.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        label.font = UIFont.monospacedDigitSystemFont(ofSize: self.maxFontSize, weight: UIFontWeightMedium)
+        label.textColor = UIColor.darkGray
         label.text = "Scalable text"
-        label.textAlignment = .Center
+        label.textAlignment = .center
         return label
     }()
 
@@ -29,15 +29,15 @@ class ScalableLabelHeaderView: GSKStretchyHeaderView {
         self.minimumContentHeight = 64
 
         self.contentView.addSubview(self.label)
-        self.backgroundColor = UIColor.orangeColor()
+        self.backgroundColor = UIColor.orange
     }
 
-    override func didChangeStretchFactor(stretchFactor: CGFloat) {
+    override func didChangeStretchFactor(_ stretchFactor: CGFloat) {
         super.didChangeStretchFactor(stretchFactor)
 
         let fontSize = CGFloatTranslateRange(min(1, stretchFactor), 0, 1, minFontSize, maxFontSize)
         if abs(fontSize - self.label.font.pointSize) > 0.05 { // to avoid changing the font too often, this could be more precise though
-            self.label.font = UIFont.monospacedDigitSystemFontOfSize(fontSize, weight: UIFontWeightMedium)
+            self.label.font = UIFont.monospacedDigitSystemFont(ofSize: fontSize, weight: UIFontWeightMedium)
         }
     }
 }

Example/GSKStretchyHeaderView/ScalableLabelViewController.swift

@@ -12,22 +12,22 @@ class ScalableLabelViewController: GSKExampleBaseTableViewController {
         self.configureExpandModeButton()
     }
 
-    override func viewWillAppear(animated: Bool) {
+    override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(true)
         self.navigationController?.gsk_setNavigationBarTransparent(true, animated: false)
     }
 
     func configureExpandModeButton() {
-        let buttonTitle: String = self.stretchyHeaderView.expansionMode == .TopOnly ? "Top only" : "Immediate"
-        self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: buttonTitle, style: .Plain, target: self, action: #selector(switchExpandMode))
+        let buttonTitle: String = self.stretchyHeaderView.expansionMode == .topOnly ? "Top only" : "Immediate"
+        self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: buttonTitle, style: .plain, target: self, action: #selector(switchExpandMode))
     }
 
     func switchExpandMode() {
         switch self.stretchyHeaderView.expansionMode {
-        case .TopOnly:
-            self.stretchyHeaderView.expansionMode = .Immediate
-        case .Immediate:
-            self.stretchyHeaderView.expansionMode = .TopOnly
+        case .topOnly:
+            self.stretchyHeaderView.expansionMode = .immediate
+        case .immediate:
+            self.stretchyHeaderView.expansionMode = .topOnly
         }
         self.configureExpandModeButton()
     }