From fc705629474f98f79b863e1d60af00ea59a41787 Mon Sep 17 00:00:00 2001
From: Alex K <kalinkin.aleksey@gmail.com>
Date: Mon, 29 Jan 2018 11:47:58 +0300
Subject: [PATCH] Fixes #66

---
 .../DemoViewController.swift                  |  2 +-
 README.md                                     | 11 ++++------
 .../Cells/BasePageCollectionCell.swift        | 21 ++-----------------
 .../ExpandingViewController.swift             |  6 +++---
 4 files changed, 10 insertions(+), 30 deletions(-)

diff --git a/DemoExpandingCollection/DemoExpandingCollection/ViewControllers/DemoViewController/DemoViewController.swift b/DemoExpandingCollection/DemoExpandingCollection/ViewControllers/DemoViewController/DemoViewController.swift
index 083f6c2..4f15a5c 100644
--- a/DemoExpandingCollection/DemoExpandingCollection/ViewControllers/DemoViewController/DemoViewController.swift
+++ b/DemoExpandingCollection/DemoExpandingCollection/ViewControllers/DemoViewController/DemoViewController.swift
@@ -22,7 +22,7 @@ class DemoViewController: ExpandingViewController {
 extension DemoViewController {
 
     override func viewDidLoad() {
-        itemSize = CGSize(width: 256, height: 335)
+        itemSize = CGSize(width: 256, height: 460)
         super.viewDidLoad()
 
         registerCell()
diff --git a/README.md b/README.md
index 5b28c0b..a3a5af3 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ The [iPhone mockup](https://store.ramotion.com?utm_source=gthb&utm_medium=specia
 ## Requirements
 
 - iOS 9.0+
-- Xcode 8
+- Xcode 9.0+
 
 ## Installation
 
@@ -39,12 +39,9 @@ Just add the Source folder to your project.
 
 or use [CocoaPods](https://cocoapods.org) with Podfile:
 ``` ruby
-pod 'expanding-collection', '~> 1.1.2' swift 4
-
-pod 'expanding-collection', '~> 1.0.3' swift 3
-
-pod 'expanding-collection', '~> 0.3.2' swift 2
+pod 'expanding-collection'
 ```
+
 or [Carthage](https://github.com/Carthage/Carthage) users can simply add to their `Cartfile`:
 ```
 github "Ramotion/expanding-collection"
@@ -84,7 +81,7 @@ import expanding_collection
 
 ``` swift
 override func viewDidLoad() {
-    itemSize = CGSize(width: 214, height: 264)
+    itemSize = CGSize(width: 214, height: 460) //IMPORTANT!!! Height of open state cell
     super.viewDidLoad()
 
     // register cell
diff --git a/Source/ExpandingViewController/CollectionView/Cells/BasePageCollectionCell.swift b/Source/ExpandingViewController/CollectionView/Cells/BasePageCollectionCell.swift
index 6483b93..45f19c9 100644
--- a/Source/ExpandingViewController/CollectionView/Cells/BasePageCollectionCell.swift
+++ b/Source/ExpandingViewController/CollectionView/Cells/BasePageCollectionCell.swift
@@ -109,8 +109,8 @@ extension BasePageCollectionCell {
         if isOpen == isOpened { return }
 
         if ySpacing == .greatestFiniteMagnitude {
-            frontConstraintY.constant = isOpen == true ? -frontContainerView.bounds.size.height / 5 : 0
-            backConstraintY.constant = isOpen == true ? frontContainerView.bounds.size.height / 5 - yOffset / 2 : 0
+            frontConstraintY.constant = isOpen == true ? -frontContainerView.bounds.size.height / 6 : 0
+            backConstraintY.constant = isOpen == true ? frontContainerView.bounds.size.height / 6 - yOffset / 2 : 0
         } else {
             frontConstraintY.constant = isOpen == true ? -ySpacing / 2 : 0
             backConstraintY.constant = isOpen == true ? ySpacing / 2 : 0
@@ -133,7 +133,6 @@ extension BasePageCollectionCell {
         }
 
         isOpened = isOpen
-        configurationCell()
 
         if animated == true {
             UIView.animate(withDuration: 0.3, delay: 0, options: UIViewAnimationOptions(), animations: {
@@ -204,22 +203,6 @@ extension BasePageCollectionCell {
         return shadow
     }
 
-    func configurationCell() {
-        // Prevents indefinite growing of the cell issue
-        let i: CGFloat = isOpened ? 1 : -1
-        let superHeight = superview?.frame.size.height ?? 0
-
-        frame.size.height += i * superHeight
-        frame.origin.y -= i * superHeight / 2
-        if additionalWidth == .greatestFiniteMagnitude {
-            frame.origin.x -= i * yOffset / 2
-            frame.size.width += i * yOffset
-        } else {
-            frame.origin.x -= i * additionalWidth / 2
-            frame.size.width += i * additionalWidth
-        }
-    }
-
     func configureCellViewConstraintsWithSize(_ size: CGSize) {
         guard isOpened == false && frontContainerView.getConstraint(.width)?.constant != size.width else { return }
 
diff --git a/Source/ExpandingViewController/ExpandingViewController.swift b/Source/ExpandingViewController/ExpandingViewController.swift
index e00a9d0..6111311 100644
--- a/Source/ExpandingViewController/ExpandingViewController.swift
+++ b/Source/ExpandingViewController/ExpandingViewController.swift
@@ -11,8 +11,8 @@ import UIKit
 /// UIViewController with UICollectionView with custom transition method
 open class ExpandingViewController: UIViewController {
 
-    /// The default size to use for cells.
-    open var itemSize = CGSize(width: 256, height: 335)
+    /// The default size to use for cells. Height of open cell state
+    open var itemSize = CGSize(width: 256, height: 460)
 
     ///  The collection view object managed by this view controller.
     open var collectionView: UICollectionView?
@@ -86,7 +86,7 @@ extension ExpandingViewController {
         let layout = PageCollectionLayout(itemSize: itemSize)
         collectionView = PageCollectionView.createOnView(view,
                                                          layout: layout,
-                                                         height: itemSize.height + itemSize.height / 5 * 2,
+                                                         height: itemSize.height,
                                                          dataSource: self,
                                                          delegate: self)
         if #available(iOS 10.0, *) {