support multiple segmented view controllers

Example/SJSegmentedScrollViewDemo.xcodeproj/project.pbxproj

@@ -179,7 +179,7 @@
 					607FACCF1AFB9204008FA782 = {
 						CreatedOnToolsVersion = 6.3.1;
 						DevelopmentTeam = 5DYFD9UMYF;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1000;
 					};
 				};
 			};
@@ -415,8 +415,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.qburst.SJSegmentedScrollViewDemo;
 				PRODUCT_NAME = SJSegmentedScrollViewDemo;
 				PROVISIONING_PROFILE = "";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -436,8 +435,7 @@
 				PRODUCT_NAME = SJSegmentedScrollViewDemo;
 				PROVISIONING_PROFILE = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;

Example/SJSegmentedScrollViewDemo/ViewControllers/FirstTableViewController.swift

@@ -17,7 +17,7 @@ class FirstTableViewController: UITableViewController {
 
 		refreshControl?.addTarget(self,
 		                          action: #selector(handleRefresh(_:)),
-		                          for: UIControlEvents.valueChanged)
+		                          for: UIControl.Event.valueChanged)
 	}
 
 	@objc func handleRefresh(_ refreshControl: UIRefreshControl) {

SJSegmentedScrollView/Classes/SJContentView.swift

@@ -24,6 +24,8 @@ import UIKit
 
 class SJContentView: UIScrollView {
 
+    weak var segmentedViewController: SJSegmentedViewController?
+
     var pageIndex = 0
     var contentViews = [UIView]()
     var contentView: UIView!
@@ -147,6 +149,7 @@ extension SJContentView: UIScrollViewDelegate {
         pageIndex = Int(contentOffset.x / bounds.size.width)
         didSelectSegmentAtIndex?(nil, pageIndex, true)
         NotificationCenter.default.post(name: Notification.Name(rawValue: "DidChangeSegmentIndex"),
-                                        object: pageIndex)
+                                        object: segmentedViewController,
+                                        userInfo: ["index": pageIndex])
     }
 }

SJSegmentedScrollView/Classes/SJSegmentTab.swift

@@ -28,7 +28,9 @@ open class SJSegmentTab: UIView {
 
 	let kSegmentViewTagOffset = 100
 	let button = UIButton(type: .custom)
-
+
+    weak var segmentedViewController: SJSegmentedViewController?
+
 	var didSelectSegmentAtIndex: DidSelectSegmentAtIndex?
 	var isSelected = false {
 		didSet {
@@ -102,8 +104,10 @@ open class SJSegmentTab: UIView {
 	@objc func onSegmentButtonPress(_ sender: AnyObject) {
 
 		let index = tag - kSegmentViewTagOffset
-		NotificationCenter.default.post(name: Notification.Name(rawValue: "DidChangeSegmentIndex"),
-		                                object: index)
+
+        NotificationCenter.default.post(name: Notification.Name(rawValue: "DidChangeSegmentIndex"),
+                                        object: segmentedViewController,
+                                        userInfo: ["index": index])
 
 		if didSelectSegmentAtIndex != nil {
 			didSelectSegmentAtIndex!(self, index, true)

SJSegmentedScrollView/Classes/SJSegmentView.swift

@@ -24,6 +24,8 @@ import UIKit
 
 class SJSegmentView: UIScrollView {
 
+    weak var segmentedViewController: SJSegmentedViewController?
+
     var selectedSegmentViewColor: UIColor? {
         didSet {
             selectedSegmentView?.backgroundColor = selectedSegmentViewColor
@@ -89,32 +91,29 @@ class SJSegmentView: UIScrollView {
         }
     }
 
-    required override init(frame: CGRect) {
-        super.init(frame: frame)
-
+    convenience init(frame: CGRect, segmentedViewController: SJSegmentedViewController?) {
+        self.init(frame: frame)
+
+        self.segmentedViewController = segmentedViewController
+
 		showsHorizontalScrollIndicator = false
 		showsVerticalScrollIndicator = false
 		bounces = false
-
-
+
 		NotificationCenter.default.addObserver(self,
 		                                       selector: #selector(SJSegmentView.didChangeSegmentIndex(_:)),
 		                                       name: NSNotification.Name("DidChangeSegmentIndex"),
-		                                       object: nil)
+		                                       object: segmentedViewController)
     }
 
-    required init?(coder aDecoder: NSCoder) {
-        fatalError("init(coder:) has not been implemented")
-    }
-
     deinit {
         contentView!.removeObserver(self,
                                     forKeyPath: "contentOffset",
                                     context: nil)
 
         NotificationCenter.default.removeObserver(self,
                                                             name:NSNotification.Name("DidChangeSegmentIndex"),
-                                                            object: nil)
+                                                            object: segmentedViewController)
     }
 
     @objc func didChangeSegmentIndex(_ notification: Notification) {
@@ -125,7 +124,7 @@ class SJSegmentView: UIScrollView {
         }
 
         // select current button
-        let index = notification.object as? Int
+        let index = notification.userInfo?["index"] as? Int
 
 		if index! < segments.count {
 			let button = segments[index!]
@@ -281,6 +280,7 @@ class SJSegmentView: UIScrollView {
 		}
 
 		segmentTab?.didSelectSegmentAtIndex = didSelectSegmentAtIndex
+        segmentTab?.segmentedViewController = segmentedViewController
 
         return segmentTab!
     }

SJSegmentedScrollView/Classes/SJSegmentedScrollView.swift

@@ -24,6 +24,8 @@ import UIKit
 
 class SJSegmentedScrollView: UIScrollView {
 
+    weak var segmentedViewController: SJSegmentedViewController?
+
     var segmentView: SJSegmentView?
 
     var headerViewHeight: CGFloat! = 0 {
@@ -128,7 +130,7 @@ class SJSegmentedScrollView: UIScrollView {
         translatesAutoresizingMaskIntoConstraints = false
         showsHorizontalScrollIndicator = sjShowsHorizontalScrollIndicator
         showsVerticalScrollIndicator = sjShowsVerticalScrollIndicator
-		decelerationRate = UIScrollViewDecelerationRateFast
+		decelerationRate = UIScrollView.DecelerationRate.fast
         bounces = false
 
         addObserver(self, forKeyPath: "contentOffset",
@@ -259,7 +261,7 @@ class SJSegmentedScrollView: UIScrollView {
 
         if controllers.count > 1 {
 
-            segmentView = SJSegmentView(frame: CGRect.zero)
+            segmentView = SJSegmentView(frame: CGRect.zero, segmentedViewController: segmentedViewController)
 			segmentView?.controllers					= controllers
             segmentView?.selectedSegmentViewColor		= selectedSegmentViewColor
             segmentView?.selectedSegmentViewHeight		= selectedSegmentViewHeight!
@@ -321,6 +323,7 @@ class SJSegmentedScrollView: UIScrollView {
         contentView.isScrollEnabled = !sjDisableScrollOnContentView
         contentView.translatesAutoresizingMaskIntoConstraints = false
 		contentView.bounces = segmentBounces
+        contentView.segmentedViewController = segmentedViewController
         scrollContentView.addSubview(contentView)
 
         let horizontalConstraints = NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[contentView]-0-|",

SJSegmentedScrollView/Classes/SJSegmentedViewController.swift

@@ -282,7 +282,22 @@ import UIKit
     }
 
     open weak var delegate:SJSegmentedViewControllerDelegate?
-    var segmentedScrollView = SJSegmentedScrollView(frame: CGRect.zero)
+
+    open weak var segmentedScrollViewDelegate: UIScrollViewDelegate? {
+        get {
+            return segmentedScrollView.delegate
+        }
+        set {
+            segmentedScrollView.delegate = newValue
+        }
+    }
+
+    lazy var segmentedScrollView: SJSegmentedScrollView = {
+        let sv = SJSegmentedScrollView(frame: CGRect.zero)
+        sv.segmentedViewController = self
+        return sv
+    }()
+
     var segmentScrollViewTopConstraint: NSLayoutConstraint?
 
 
@@ -350,8 +365,8 @@ import UIKit
 			segmentedScrollView.segmentView?.didSelectSegmentAtIndex!(segments[index],
 			                                                          index,
 			                                                          animated)
-			NotificationCenter.default.post(name: Notification.Name(rawValue: "DidChangeSegmentIndex"),
-			                                object: index)
+            NotificationCenter.default.post(name: Notification.Name(rawValue: "DidChangeSegmentIndex"),
+                                            object: self, userInfo: ["index": index])
 		}
 	}
 
@@ -427,9 +442,9 @@ import UIKit
      */
     func addHeaderViewController(_ headerViewController: UIViewController) {
 
-        addChildViewController(headerViewController)
+        addChild(headerViewController)
         segmentedScrollView.addHeaderView(headerViewController.view)
-        headerViewController.didMove(toParentViewController: self)
+        headerViewController.didMove(toParent: self)
     }
 
     /**
@@ -443,9 +458,9 @@ import UIKit
         var index = 0
         for controller in contentControllers {
 
-            addChildViewController(controller)
+            addChild(controller)
             segmentedScrollView.addContentView(controller.view, frame: view.bounds)
-            controller.didMove(toParentViewController: self)
+            controller.didMove(toParent: self)
 
             let delegate = controller as? SJSegmentedViewControllerViewSource
             var observeView = controller.view

SJSegmentedScrollView/Classes/SJUtil.swift

@@ -38,7 +38,7 @@ class SJUtil {
 		var topSpacing: CGFloat = 0.0
 		let navigationController = viewController.navigationController
 
-		if navigationController?.childViewControllers.last == viewController {
+		if navigationController?.children.last == viewController {
 
 			if navigationController?.isNavigationBarHidden == false {
 				topSpacing = UIApplication.shared.statusBarFrame.height
@@ -77,7 +77,7 @@ extension String {
 		let constraintRect = CGSize(width: width, height: .greatestFiniteMagnitude)
 		let boundingBox = self.boundingRect(with: constraintRect,
 		                                    options: .usesLineFragmentOrigin,
-		                                    attributes: [NSAttributedStringKey.font: font], context: nil)
+		                                    attributes: [NSAttributedString.Key.font: font], context: nil)
 		return boundingBox.width
 	}
 }