Merge pull request #10 from scotbond/swift2.3

Swift 2.3

Author: m1entus

INSPhotoGallery/INSPhotosTransitionAnimator.swift

@@ -86,14 +86,16 @@ class INSPhotosTransitionAnimator: NSObject, UIViewControllerAnimatedTransitioni
         if let toView = transitionContext.viewForKey(UITransitionContextToViewKey),
            let toViewController = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey) {
             toView.frame = transitionContext.finalFrameForViewController(toViewController)
-            if let containerView = transitionContext.containerView() where !toView.isDescendantOfView(containerView) {
+            let containerView = transitionContext.containerView()
+            
+            if !toView.isDescendantOfView(containerView) {
                 containerView.addSubview(toView)
             }
         }
 
         if dismissing {
             if let fromView = transitionContext.viewForKey(UITransitionContextFromViewKey) {
-                transitionContext.containerView()?.bringSubviewToFront(fromView)
+                transitionContext.containerView().bringSubviewToFront(fromView)
             }
         }
     }
@@ -116,9 +118,7 @@ class INSPhotosTransitionAnimator: NSObject, UIViewControllerAnimatedTransitioni
 
     func performZoomingAnimationWithTransitionContext(transitionContext: UIViewControllerContextTransitioning) {
 
-        guard let containerView = transitionContext.containerView() else {
-            return
-        }
+        let containerView = transitionContext.containerView()
         guard let startingView = startingView, let endingView = endingView else {
             return
         }
@@ -185,4 +185,4 @@ class INSPhotosTransitionAnimator: NSObject, UIViewControllerAnimatedTransitioni
         }
         transitionContext.completeTransition(!transitionContext.transitionWasCancelled())
     }
-}
+}

INSPhotoGallery/INSPhotosViewController.swift

@@ -373,12 +373,12 @@ public class INSPhotosViewController: UIViewController, UIPageViewControllerData
     }
 
     public override func canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool {
-        if let _ = currentPhoto?.image ?? currentPhotoViewController?.scalingImageView.image where shouldHandleLongPressGesture && action == #selector(NSObject.copy(_:)) {
+        if let _ = currentPhoto?.image ?? currentPhotoViewController?.scalingImageView.image where shouldHandleLongPressGesture && action == #selector(NSObject.copy) {
             return true
         }
         return false
     }
-    
+
     // MARK: - Status Bar
 
     public override func prefersStatusBarHidden() -> Bool {

INSPhotoGallery/UIVIew+INSPhotoViewer.swift

@@ -39,7 +39,7 @@ extension UIView {
 
             return snapshotedView
         } else {
-            return snapshotViewAfterScreenUpdates(true)
+            return snapshotViewAfterScreenUpdates(true)!
         }
     }