ConcentricGridView

ConcentricGridView is a grid system that is used by UICollectionViewLayout to lay out UICollectionViewCells in a concentric way using different distribution algorithms: Concentric Uniform Distribution Algorithm (CUDA) and Concentric Consistent Distribution Algorithm (CCDA). You can see visualisations of aforementioned algorithms below (in the same order):

Requirements

• iOS 7.0+ / Mac OS X 10.9+
• Xcode 6.3

Installation

Embedded frameworks require a minimum deployment target of iOS 8 or OS X Mavericks.

To use ConcentricGridView with a project targeting iOS 7, you must include all Swift files located inside the Pod directory directly in your project.

CocoaPods

CocoaPods is a dependency manager for Cocoa projects.

CocoaPods 0.36 adds supports for Swift and embedded frameworks. You can install it with the following command:

$ gem install cocoapods

To integrate ConcentricGridView into your project using CocoaPods, specify it in your Podfile:

source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '8.0'
use_frameworks!

pod 'ConcentricGridView', :git => 'https://github.com/dmgts/concentric-grid-view.git'

Then, run the following command:

$ pod install

Usage

The extended example you are welcome to see in Example folder. Full descriptions of all classes you can find in appropriate files.

Creating a virtual grid using CUDA algorithm:

import ConcentricGridView

var CUDAGridView = ConcentricGridViewPolygon(
        grid: CGSizeMake(300, 500),
        centralCell: CGSizeMake(50, 50),
        peripheralCell: CGSizeMake(50, 50),
        cellMargin: 5
   )

CUDAGridView.createGrid()

// Get coordinates for a cell under the index 5 - for example.
CUDAGridView.getPointAt(5)

Creating a virtual grid using CCDA algorithm:

import ConcentricGridView

var CCDAGridView = ConcentricGridViewRectangle(
        grid: CGSizeMake(300, 500),
        isShifted: false,
        centralCell: CGSizeMake(50, 50),
        peripheralCell: CGSizeMake(50, 50),
        cellMargin: 5
   )

CCDAGridView.createGrid()

// Get coordinates for a cell under the index 5 - for example.
CCDAGridView.getPointAt(5)