Support iOS 9 target

PanModal/Animator/PanModalPresentationAnimator.swift

@@ -42,7 +42,21 @@ public class PanModalPresentationAnimator: NSObject {
     /**
      Haptic feedback generator (during presentation)
      */
-    private var feedbackGenerator: UISelectionFeedbackGenerator?
+    private var _feedbackGenerator: Any? = nil
+    @available(iOS 10.0, *)
+    fileprivate var feedbackGenerator: UISelectionFeedbackGenerator? {
+
+        set {
+            _feedbackGenerator = newValue
+        }
+
+        get {
+            if _feedbackGenerator == nil {
+                _feedbackGenerator = UISelectionFeedbackGenerator()
+            }
+            return _feedbackGenerator as? UISelectionFeedbackGenerator
+        }
+    }
 
     // MARK: - Initializers
 
@@ -54,8 +68,11 @@ public class PanModalPresentationAnimator: NSObject {
          Prepare haptic feedback, only during the presentation state
          */
         if case .presentation = transitionStyle {
-            feedbackGenerator = UISelectionFeedbackGenerator()
-            feedbackGenerator?.prepare()
+
+            if #available(iOS 10.0, *) {
+                feedbackGenerator = UISelectionFeedbackGenerator()
+                feedbackGenerator?.prepare()
+            }
         }
     }
 
@@ -85,8 +102,10 @@ public class PanModalPresentationAnimator: NSObject {
         panView.frame.origin.y = transitionContext.containerView.frame.height
 
         // Haptic feedback
-        if presentable?.isHapticFeedbackEnabled == true {
-            feedbackGenerator?.selectionChanged()
+        if #available(iOS 10.0, *) {
+            if presentable?.isHapticFeedbackEnabled == true {
+                feedbackGenerator?.selectionChanged()
+            }
         }
 
         PanModalAnimator.animate({
@@ -95,7 +114,10 @@ public class PanModalPresentationAnimator: NSObject {
             // Calls viewDidAppear and viewDidDisappear
             fromVC.endAppearanceTransition()
             transitionContext.completeTransition(didComplete)
-            self?.feedbackGenerator = nil
+
+            if #available(iOS 10.0, *) {
+                self?.feedbackGenerator = nil
+            }
         }
     }
 

PanModalDemo.xcodeproj/project.pbxproj

@@ -832,7 +832,7 @@
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_TEAM = 6UF7FN999R;
 				INFOPLIST_FILE = "$(SRCROOT)/Sample/Resources/Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -853,7 +853,7 @@
 				CODE_SIGN_STYLE = Automatic;
 				DEVELOPMENT_TEAM = 6UF7FN999R;
 				INFOPLIST_FILE = "$(SRCROOT)/Sample/Resources/Info.plist";
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",

Sample/View Controllers/Alert (Transient)/TransientAlertViewController.swift

@@ -26,13 +26,17 @@ class TransientAlertViewController: AlertViewController {
 
     private func startTimer() {
         timer?.invalidate()
-        timer = Timer.scheduledTimer(withTimeInterval: 1.0, repeats: true) { [weak self] _ in
-            self?.countdown -= 1
-            self?.updateMessage()
+        if #available(iOS 10.0, *) {
+            timer = Timer.scheduledTimer(withTimeInterval: 1.0, repeats: true) { [weak self] _ in
+                self?.updateMessage()
+            }
+        } else {
+            Timer.scheduledTimer(timeInterval: 1.0, target: self, selector: #selector(self.updateMessage), userInfo: nil, repeats: true)
         }
     }
 
     @objc func updateMessage() {
+        countdown -= 1
         guard countdown > 0 else {
             invalidateTimer()
             dismiss(animated: true, completion: nil)