Converted to Swift

Author: Marco Abundo

SLTDoubleTapSegmentedControl.xcodeproj/project.pbxproj

@@ -1,5 +1,15 @@
 {
   "images" : [
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "3x"
+    },
     {
       "idiom" : "iphone",
       "size" : "29x29",
@@ -30,6 +40,16 @@
       "size" : "60x60",
       "scale" : "3x"
     },
+    {
+      "idiom" : "ipad",
+      "size" : "20x20",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
     {
       "idiom" : "ipad",
       "size" : "29x29",
@@ -59,6 +79,16 @@
       "idiom" : "ipad",
       "size" : "76x76",
       "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "83.5x83.5",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "size" : "1024x1024",
+      "scale" : "1x"
     }
   ],
   "info" : {

SLTDoubleTapSegmentedControl/Images.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2018 shrtlist
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import UIKit
+
+@UIApplicationMain
+class SLTAppDelegate: UIResponder, UIApplicationDelegate {
+
+    var window: UIWindow?
+
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
+        // Override point for customization after application launch.
+
+        window = UIWindow(frame: UIScreen.main.bounds)
+
+        let viewController = SLTViewController(nibName: "SLTViewController", bundle: nil)
+
+        window?.rootViewController = viewController
+        window?.makeKeyAndVisible()
+
+        return true
+    }
+}

SLTDoubleTapSegmentedControl/SLTAppDelegate.h

@@ -17,7 +17,7 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
+	<string>1.1</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

SLTDoubleTapSegmentedControl/SLTAppDelegate.m

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2018 shrtlist
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Double-tap segmented control. Each segment functions as a discrete double-tap button.
+// Credit: http://stackoverflow.com/questions/17652773/how-to-deselect-a-segment-in-segmented-control-button-permanently-till-its-click?lq=1
+
+import UIKit
+
+class SLTDoubleTapSegmentedControl: UISegmentedControl {
+
+    // MARK: Public method
+
+    func setTintColor(tintColor: UIColor, forSegmentAtIndex index: Int) {
+        guard let title = titleForSegment(at: index) else { return }
+
+        let font = UIFont.systemFont(ofSize: 12)
+
+        let attributes = [NSAttributedStringKey.font: font, NSAttributedStringKey.foregroundColor: tintColor]
+
+        let attributedString = NSAttributedString(string: title, attributes: attributes)
+
+        let image = imageFromAttributedString(text: attributedString)
+
+        setImage(image, forSegmentAt: index)
+    }
+
+    // MARK: Private methods
+
+    private func imageFromAttributedString(text: NSAttributedString) -> UIImage? {
+        UIGraphicsBeginImageContextWithOptions(text.size(), false, 0.0)
+
+        // draw in context
+        text.draw(at: CGPoint(x: 0, y: 0))
+
+        // transfer image
+        guard let image = UIGraphicsGetImageFromCurrentImageContext()?.withRenderingMode(.alwaysOriginal) else {
+            UIGraphicsEndImageContext()
+            return nil
+        }
+
+        UIGraphicsEndImageContext()
+
+        return image
+    }
+
+    // MARK: Custom touch handling
+
+    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
+        let previousSelectedSegmentIndex = selectedSegmentIndex
+
+        super.touchesEnded(touches, with: event)
+
+        if previousSelectedSegmentIndex == selectedSegmentIndex {
+            // Clear the segmented control
+            selectedSegmentIndex = UISegmentedControlNoSegment
+
+            // if the selectedSegmentIndex before the selection process is equal to the selectedSegmentIndex
+            // after the selection process the superclass won't send a UIControlEventValueChanged event.
+            // So we have to do this ourselves.
+            sendActions(for: .valueChanged)
+        }
+    }
+}