diff --git a/FSPageViewExample-Swift/FSPagerViewExample.xcodeproj/project.pbxproj b/FSPageViewExample-Swift/FSPagerViewExample.xcodeproj/project.pbxproj
index 23a81bc..80af4f5 100644
--- a/FSPageViewExample-Swift/FSPagerViewExample.xcodeproj/project.pbxproj
+++ b/FSPageViewExample-Swift/FSPagerViewExample.xcodeproj/project.pbxproj
@@ -7,6 +7,8 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		F954839A1E625F1E0069FD7E /* FSPagerViewLayoutAttributes.swift in Sources */ = {isa = PBXBuildFile; fileRef = F95483991E625F1E0069FD7E /* FSPagerViewLayoutAttributes.swift */; };
+		F954839B1E625F1E0069FD7E /* FSPagerViewLayoutAttributes.swift in Sources */ = {isa = PBXBuildFile; fileRef = F95483991E625F1E0069FD7E /* FSPagerViewLayoutAttributes.swift */; };
 		F9580B571E5D995400C5B267 /* FSPageControl.swift in Sources */ = {isa = PBXBuildFile; fileRef = F9580B511E5D995400C5B267 /* FSPageControl.swift */; };
 		F9580B581E5D995400C5B267 /* FSPagerCollectionView.swift in Sources */ = {isa = PBXBuildFile; fileRef = F9580B521E5D995400C5B267 /* FSPagerCollectionView.swift */; };
 		F9580B591E5D995400C5B267 /* FSPagerView.swift in Sources */ = {isa = PBXBuildFile; fileRef = F9580B531E5D995400C5B267 /* FSPagerView.swift */; };
@@ -49,6 +51,7 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		F95483991E625F1E0069FD7E /* FSPagerViewLayoutAttributes.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = FSPagerViewLayoutAttributes.swift; sourceTree = "<group>"; };
 		F9580B511E5D995400C5B267 /* FSPageControl.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = FSPageControl.swift; sourceTree = "<group>"; };
 		F9580B521E5D995400C5B267 /* FSPagerCollectionView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = FSPagerCollectionView.swift; sourceTree = "<group>"; };
 		F9580B531E5D995400C5B267 /* FSPagerView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = FSPagerView.swift; sourceTree = "<group>"; };
@@ -111,6 +114,7 @@
 				F9580B541E5D995400C5B267 /* FSPagerViewCell.swift */,
 				F9580B551E5D995400C5B267 /* FSPageViewLayout.swift */,
 				F9580B561E5D995400C5B267 /* FSPageViewTransformer.swift */,
+				F95483991E625F1E0069FD7E /* FSPagerViewLayoutAttributes.swift */,
 			);
 			name = Sources;
 			path = ../Sources;
@@ -322,6 +326,7 @@
 				F9580B571E5D995400C5B267 /* FSPageControl.swift in Sources */,
 				F9580B581E5D995400C5B267 /* FSPagerCollectionView.swift in Sources */,
 				F9C6942F1E40C583007084B6 /* AppDelegate.swift in Sources */,
+				F954839A1E625F1E0069FD7E /* FSPagerViewLayoutAttributes.swift in Sources */,
 				F9580B591E5D995400C5B267 /* FSPagerView.swift in Sources */,
 				F9C694351E40C583007084B6 /* PageControlExampleViewController.swift in Sources */,
 				F9C694361E40C583007084B6 /* TransformerExampleViewController.swift in Sources */,
@@ -336,6 +341,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				F954839B1E625F1E0069FD7E /* FSPagerViewLayoutAttributes.swift in Sources */,
 				F9C6945A1E40C720007084B6 /* FSPagerViewExampleUITests.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
diff --git a/FSPageViewExample-Swift/FSPagerViewExample/Base.lproj/Main.storyboard b/FSPageViewExample-Swift/FSPagerViewExample/Base.lproj/Main.storyboard
index dd6604a..1202356 100644
--- a/FSPageViewExample-Swift/FSPagerViewExample/Base.lproj/Main.storyboard
+++ b/FSPageViewExample-Swift/FSPagerViewExample/Base.lproj/Main.storyboard
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11762" systemVersion="16C67" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="65m-zG-Zjb">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11762" systemVersion="16D32" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="65m-zG-Zjb">
     <device id="retina4_7" orientation="portrait">
         <adaptation id="fullscreen"/>
     </device>
@@ -234,6 +234,9 @@
                                 <constraints>
                                     <constraint firstAttribute="width" secondItem="tSq-4e-Jil" secondAttribute="height" multiplier="375:193" id="8cc-kO-s6Y"/>
                                 </constraints>
+                                <userDefinedRuntimeAttributes>
+                                    <userDefinedRuntimeAttribute type="boolean" keyPath="isInfinite" value="YES"/>
+                                </userDefinedRuntimeAttributes>
                                 <connections>
                                     <outlet property="dataSource" destination="UOf-Wx-Dm5" id="Xcy-kf-B7Y"/>
                                     <outlet property="delegate" destination="UOf-Wx-Dm5" id="cQD-fS-FFJ"/>
diff --git a/Sources/FSPageViewLayout.swift b/Sources/FSPageViewLayout.swift
index 8993ba4..84da1b1 100644
--- a/Sources/FSPageViewLayout.swift
+++ b/Sources/FSPageViewLayout.swift
@@ -15,10 +15,16 @@ class FSPagerViewLayout: UICollectionViewLayout {
     internal var itemSpan: CGFloat = 0
     internal var needsReprepare = true
     
+    open override class var layoutAttributesClass: AnyClass {
+        get {
+            return FSPagerViewLayoutAttributes.self
+        }
+    }
+    
     fileprivate var pagerView: FSPagerView? {
         return self.collectionView?.superview?.superview as? FSPagerView
     }
-    fileprivate var layoutAttributes: [IndexPath:UICollectionViewLayoutAttributes] = [:]
+    fileprivate var layoutAttributes: [IndexPath:FSPagerViewLayoutAttributes] = [:]
     
     fileprivate var isInfinite: Bool = true
     fileprivate var collectionViewSize: CGSize = .zero
@@ -118,7 +124,7 @@ class FSPagerViewLayout: UICollectionViewLayout {
         let maxPosition = min(rect.maxX,self.contentSize.width-self.actualItemSize.width)
         while x <= maxPosition {
             let indexPath = IndexPath(item: itemIndex%self.numberOfItems, section: itemIndex/self.numberOfItems)
-            let attributes = self.layoutAttributesForItem(at: indexPath)!
+            let attributes = self.layoutAttributesForItem(at: indexPath) as! FSPagerViewLayoutAttributes
             self.applyTransform(to: attributes)
             layoutAttributes.append(attributes)
             itemIndex += 1
@@ -134,7 +140,9 @@ class FSPagerViewLayout: UICollectionViewLayout {
         if let attributes = self.layoutAttributes[indexPath] {
             return attributes
         }
-        let attributes = UICollectionViewLayoutAttributes(forCellWith: indexPath)
+        let attributes = FSPagerViewLayoutAttributes(forCellWith: indexPath)
+        attributes.itemSize = self.actualItemSize
+        attributes.interitemSpacing = self.actualInteritemSpacing
         let x = self.frame(for: indexPath).minX
         let center = CGPoint(x: x+self.actualItemSize.width*0.5, y: collectionView.frame.height*0.5)
         attributes.center = center
@@ -217,7 +225,7 @@ class FSPagerViewLayout: UICollectionViewLayout {
         collectionView.bounds = newBounds
     }
     
-    fileprivate func applyTransform(to attributes: UICollectionViewLayoutAttributes) {
+    fileprivate func applyTransform(to attributes: FSPagerViewLayoutAttributes) {
         guard let collectionView = self.collectionView else {
             return
         }
diff --git a/Sources/FSPageViewTransformer.swift b/Sources/FSPageViewTransformer.swift
index e52df69..58fb57b 100644
--- a/Sources/FSPageViewTransformer.swift
+++ b/Sources/FSPageViewTransformer.swift
@@ -47,11 +47,8 @@ open class FSPagerViewTransformer: NSObject {
     }
     
     // Apply transform to attributes - zIndex: Int, frame: CGRect, alpha: CGFloat, transform: CGAffineTransform or transform3D: CATransform3D.
-    open func applyTransform(to attributes: UICollectionViewLayoutAttributes, for position: CGFloat) {
-        guard let pagerView = self.pagerView else {
-            return
-        }
-        let itemSpan = pagerView.collectionViewLayout.itemSpan
+    open func applyTransform(to attributes: FSPagerViewLayoutAttributes, for position: CGFloat) {
+        let itemSpan = attributes.interitemSpacing + attributes.itemSize.width
         switch self.type {
         case .none:
             break
diff --git a/Sources/FSPagerViewLayoutAttributes.swift b/Sources/FSPagerViewLayoutAttributes.swift
new file mode 100644
index 0000000..4e11ea3
--- /dev/null
+++ b/Sources/FSPagerViewLayoutAttributes.swift
@@ -0,0 +1,21 @@
+//
+//  FSPagerViewLayoutAttributes.swift
+//  FSPagerViewExample
+//
+//  Created by Wenchao Ding on 26/02/2017.
+//  Copyright © 2017 Wenchao Ding. All rights reserved.
+//
+
+import UIKit
+
+open class FSPagerViewLayoutAttributes: UICollectionViewLayoutAttributes {
+    
+    open var itemSize: CGSize = .zero
+    open var interitemSpacing: CGFloat = 0
+    
+    override init() {
+        super.init()
+    }
+
+    
+}