Dynamic Cell Size as number of cell increases or decreases.

.gitignore

@@ -1,4 +1,21 @@
+# Xcode
+.DS_Store
+*/build/*
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+profile
+*.moved-aside
+DerivedData
+.idea/
+*.hmap
+*.xccheckout
 
-CircleLayout.xcodeproj/xcuserdata/mark.xcuserdatad/xcschemes/CircleLayout.xcscheme
-
-CircleLayout.xcodeproj/xcuserdata/mark.xcuserdatad/xcschemes/xcschememanagement.plist
+#CocoaPods
+Pods

CircleLayout.xcodeproj/project.pbxproj

@@ -17,6 +17,7 @@
 		77AF0097157FA528001EC3FB /* Cell.m in Sources */ = {isa = PBXBuildFile; fileRef = 77AF0094157FA528001EC3FB /* Cell.m */; };
 		77AF0098157FA528001EC3FB /* CircleLayout.m in Sources */ = {isa = PBXBuildFile; fileRef = 77AF0096157FA528001EC3FB /* CircleLayout.m */; };
 		77C30BB5157FB7EB005E487B /* QuartzCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 77C30BB4157FB7EB005E487B /* QuartzCore.framework */; };
+		DDAF56EE1B43F2CB00A35AE1 /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = DDAF56ED1B43F2CB00A35AE1 /* Images.xcassets */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -38,6 +39,7 @@
 		77AF0095157FA528001EC3FB /* CircleLayout.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CircleLayout.h; sourceTree = "<group>"; };
 		77AF0096157FA528001EC3FB /* CircleLayout.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CircleLayout.m; sourceTree = "<group>"; };
 		77C30BB4157FB7EB005E487B /* QuartzCore.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = QuartzCore.framework; path = System/Library/Frameworks/QuartzCore.framework; sourceTree = SDKROOT; };
+		DDAF56ED1B43F2CB00A35AE1 /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Images.xcassets; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -103,6 +105,7 @@
 		77AF007D157FA442001EC3FB /* Supporting Files */ = {
 			isa = PBXGroup;
 			children = (
+				DDAF56ED1B43F2CB00A35AE1 /* Images.xcassets */,
 				77AF007E157FA442001EC3FB /* CircleLayout-Info.plist */,
 				77AF007F157FA442001EC3FB /* InfoPlist.strings */,
 				77AF0082157FA442001EC3FB /* main.m */,
@@ -163,6 +166,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				77AF0081157FA442001EC3FB /* InfoPlist.strings in Resources */,
+				DDAF56EE1B43F2CB00A35AE1 /* Images.xcassets in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -245,21 +249,29 @@
 		77AF0091157FA442001EC3FB /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "CircleLayout/CircleLayout-Prefix.pch";
 				INFOPLIST_FILE = "CircleLayout/CircleLayout-Info.plist";
+				IPHONEOS_DEPLOYMENT_TARGET = 7.0;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				TARGETED_DEVICE_FAMILY = "1,2";
 				WRAPPER_EXTENSION = app;
 			};
 			name = Debug;
 		};
 		77AF0092157FA442001EC3FB /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				ASSETCATALOG_COMPILER_LAUNCHIMAGE_NAME = LaunchImage;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "CircleLayout/CircleLayout-Prefix.pch";
 				INFOPLIST_FILE = "CircleLayout/CircleLayout-Info.plist";
+				IPHONEOS_DEPLOYMENT_TARGET = 7.0;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				TARGETED_DEVICE_FAMILY = "1,2";
 				WRAPPER_EXTENSION = app;
 			};
 			name = Release;

CircleLayout/Cell.h

@@ -1,101 +1,18 @@
-
 /*
-     File: Cell.h
+ File: Cell.h
  Abstract: 
 
   Version: 1.0
-
- Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple
- Inc. ("Apple") in consideration of your agreement to the following
- terms, and your use, installation, modification or redistribution of
- this Apple software constitutes acceptance of these terms.  If you do
- not agree with these terms, please do not use, install, modify or
- redistribute this Apple software.
-
- In consideration of your agreement to abide by the following terms, and
- subject to these terms, Apple grants you a personal, non-exclusive
- license, under Apple's copyrights in this original Apple software (the
- "Apple Software"), to use, reproduce, modify and redistribute the Apple
- Software, with or without modifications, in source and/or binary forms;
- provided that if you redistribute the Apple Software in its entirety and
- without modifications, you must retain this notice and the following
- text and disclaimers in all such redistributions of the Apple Software.
- Neither the name, trademarks, service marks or logos of Apple Inc. may
- be used to endorse or promote products derived from the Apple Software
- without specific prior written permission from Apple.  Except as
- expressly stated in this notice, no other rights or licenses, express or
- implied, are granted by Apple herein, including but not limited to any
- patent rights that may be infringed by your derivative works or by other
- works in which the Apple Software may be incorporated.
-
- The Apple Software is provided by Apple on an "AS IS" basis.  APPLE
- MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
- THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
- FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
- OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
-
- IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
- OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
- MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
- AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
- STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGE.
-
- Copyright (C) 2012 Apple Inc. All Rights Reserved.
-
-
- WWDC 2012 License
-
- NOTE: This Apple Software was supplied by Apple as part of a WWDC 2012
- Session. Please refer to the applicable WWDC 2012 Session for further
- information.
-
- IMPORTANT: This Apple software is supplied to you by Apple
- Inc. ("Apple") in consideration of your agreement to the following
- terms, and your use, installation, modification or redistribution of
- this Apple software constitutes acceptance of these terms.  If you do
- not agree with these terms, please do not use, install, modify or
- redistribute this Apple software.
-
- In consideration of your agreement to abide by the following terms, and
- subject to these terms, Apple grants you a non-exclusive license, under
- Apple's copyrights in this original Apple software (the "Apple
- Software"), to use, reproduce, modify and redistribute the Apple
- Software, with or without modifications, in source and/or binary forms;
- provided that if you redistribute the Apple Software in its entirety and
- without modifications, you must retain this notice and the following
- text and disclaimers in all such redistributions of the Apple Software.
- Neither the name, trademarks, service marks or logos of Apple Inc. may
- be used to endorse or promote products derived from the Apple Software
- without specific prior written permission from Apple.  Except as
- expressly stated in this notice, no other rights or licenses, express or
- implied, are granted by Apple herein, including but not limited to any
- patent rights that may be infringed by your derivative works or by other
- works in which the Apple Software may be incorporated.
-
- The Apple Software is provided by Apple on an "AS IS" basis.  APPLE
- MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
- THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
- FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
- OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
-
- IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
- OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
- MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
- AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
- STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGE.
-
- */
+*/
 
 #import <UIKit/UIKit.h>
 
 @interface Cell : UICollectionViewCell
 
-@property (strong, nonatomic) UILabel* label;
+@property (strong, nonatomic) UILabel *label;
+@property (assign, nonatomic) CGFloat itemSize;
+
+- (id)initWithFrame:(CGRect)frame andItemSize:(CGFloat)itemSize;
+- (void)configForItemSize:(CGFloat)itemSize;
 
 @end

CircleLayout/Cell.m

@@ -97,16 +97,36 @@ OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 
 @implementation Cell
 
-- (id)initWithFrame:(CGRect)frame
-{
+- (void)configForItemSize:(CGFloat)itemSize {
+    self.itemSize = itemSize;
+    [self drawings];
+}
+
+- (id)initWithFrame:(CGRect)frame andItemSize:(CGFloat)itemSize {
+    _itemSize = itemSize;
+    return [self initWithFrame:frame];
+}
+
+- (id)initWithFrame:(CGRect)frame {
     self = [super initWithFrame:frame];
     if (self) {
-        self.contentView.layer.cornerRadius = 35.0;
-        self.contentView.layer.borderWidth = 1.0f;
-        self.contentView.layer.borderColor = [UIColor whiteColor].CGColor;
-        self.contentView.backgroundColor = [UIColor underPageBackgroundColor];
+        [self drawings];
     }
     return self;
 }
 
+
+- (void)drawings {
+    self.contentView.layer.cornerRadius = (self.itemSize / 2);
+    self.contentView.layer.borderWidth = 1.0f;
+    self.contentView.layer.borderColor = [UIColor whiteColor].CGColor;
+    self.contentView.backgroundColor = [UIColor colorWithWhite:1 alpha:1.000];
+
+    CGFloat hue = ( arc4random() % 256 / 256.0 );  //  0.0 to 1.0
+    CGFloat saturation = ( arc4random() % 128 / 256.0 ) + 0.5;  //  0.5 to 1.0, away from white
+    CGFloat brightness = ( arc4random() % 128 / 256.0 ) + 0.5;  //  0.5 to 1.0, away from black
+    UIColor *color = [UIColor colorWithHue:hue saturation:saturation brightness:brightness alpha:1];
+    self.contentView.backgroundColor = color;
+}
+
 @end

CircleLayout/CircleLayout-Info.plist

@@ -8,8 +8,12 @@
 	<string>${PRODUCT_NAME}</string>
 	<key>CFBundleExecutable</key>
 	<string>${EXECUTABLE_NAME}</string>
+	<key>CFBundleIcons</key>
+	<dict/>
+	<key>CFBundleIcons~ipad</key>
+	<dict/>
 	<key>CFBundleIdentifier</key>
-	<string>com.apple.${PRODUCT_NAME:rfc1034identifier}</string>
+	<string>com.apple.$(PRODUCT_NAME:rfc1034identifier)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>

CircleLayout/CircleLayout.h

@@ -99,5 +99,6 @@
 @property (nonatomic, assign) CGPoint center;
 @property (nonatomic, assign) CGFloat radius;
 @property (nonatomic, assign) NSInteger cellCount;
+@property (assign, nonatomic) CGFloat itemSize;
 
 @end

CircleLayout/CircleLayout.m

@@ -94,8 +94,6 @@ OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 
 #import "CircleLayout.h"
 
-#define ITEM_SIZE 70
-
 @interface CircleLayout()
 
 // arrays to keep track of insert, delete index paths
@@ -124,7 +122,7 @@ -(CGSize)collectionViewContentSize
 - (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)path
 {
     UICollectionViewLayoutAttributes* attributes = [UICollectionViewLayoutAttributes layoutAttributesForCellWithIndexPath:path];
-    attributes.size = CGSizeMake(ITEM_SIZE, ITEM_SIZE);
+    attributes.size = CGSizeMake(self.itemSize, self.itemSize);
     attributes.center = CGPointMake(_center.x + _radius * cosf(2 * path.item * M_PI / _cellCount),
                                     _center.y + _radius * sinf(2 * path.item * M_PI / _cellCount));
     return attributes;
@@ -140,8 +138,7 @@ -(NSArray*)layoutAttributesForElementsInRect:(CGRect)rect
     return attributes;
 }
 
-- (void)prepareForCollectionViewUpdates:(NSArray *)updateItems
-{
+- (void)prepareForCollectionViewUpdates:(NSArray *)updateItems {
     // Keep track of insert and delete index paths
     [super prepareForCollectionViewUpdates:updateItems];
 
@@ -161,8 +158,7 @@ - (void)prepareForCollectionViewUpdates:(NSArray *)updateItems
     }
 }
 
-- (void)finalizeCollectionViewUpdates
-{
+- (void)finalizeCollectionViewUpdates {
     [super finalizeCollectionViewUpdates];
     // release the insert and delete index paths
     self.deleteIndexPaths = nil;
@@ -172,8 +168,7 @@ - (void)finalizeCollectionViewUpdates
 // Note: name of method changed
 // Also this gets called for all visible cells (not just the inserted ones) and
 // even gets called when deleting cells!
-- (UICollectionViewLayoutAttributes *)initialLayoutAttributesForAppearingItemAtIndexPath:(NSIndexPath *)itemIndexPath
-{
+- (UICollectionViewLayoutAttributes *)initialLayoutAttributesForAppearingItemAtIndexPath:(NSIndexPath *)itemIndexPath {
     // Must call super
     UICollectionViewLayoutAttributes *attributes = [super initialLayoutAttributesForAppearingItemAtIndexPath:itemIndexPath];
 
@@ -194,8 +189,7 @@ - (UICollectionViewLayoutAttributes *)initialLayoutAttributesForAppearingItemAtI
 // Note: name of method changed
 // Also this gets called for all visible cells (not just the deleted ones) and
 // even gets called when inserting cells!
-- (UICollectionViewLayoutAttributes *)finalLayoutAttributesForDisappearingItemAtIndexPath:(NSIndexPath *)itemIndexPath
-{
+- (UICollectionViewLayoutAttributes *)finalLayoutAttributesForDisappearingItemAtIndexPath:(NSIndexPath *)itemIndexPath {
     // So far, calling super hasn't been strictly necessary here, but leaving it in
     // for good measure
     UICollectionViewLayoutAttributes *attributes = [super finalLayoutAttributesForDisappearingItemAtIndexPath:itemIndexPath];

CircleLayout/Images.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,58 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "size" : "29x29",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "40x40",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "60x60",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "60x60",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "29x29",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "29x29",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "40x40",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "40x40",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "76x76",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "76x76",
+      "scale" : "2x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}