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nexpandablecollectionview's Introduction

NExpandableCollectionView

A UICollectionView subclass that enables you to easily expand and collapse sections.

Installation

  1. Manually clone this repository to your machine or add it as a Git submodule to your project.
  2. Drag the folder NExpandableCollectionView into your Xcode project to add all the files in it to your project.

Usage

  1. #import "NExpandableCollectionView.h"
  2. Create an NExpandableCollectionView instead of a regular UICollectionView.
  3. Set allowsMultipleExpandedSections Boolean to enable/disable expanding more than one section at a time, default is NO.
  4. Call (void) toggleSection:(NSInteger)section; on the collection view. This will collapse the section if expanded (And collapse any other sections if allowsMultipleExpandedSections = NO), otherwise, expand it.
  5. You check if a section is expanded or not using (BOOL) isExpandedSection:(NSInteger)section;

NExpandableCollectionViewDelegate

NExpandableCollectionView conforms to NExpandableCollectionViewDelegate that notifies you about the various states the expanding/collapsing items go through. You can use this delegate to apply other animations alongside the expand/collapse animations. Please check the documentation for more informations about this.

Example

In the example, toggling the sections is done by clicking on the section header.

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