expanding-collection

About

This project is maintained by Ramotion, Inc.
We specialize in the designing and coding of custom UI for Mobile Apps and Websites.

Looking for developers for your project?

The iPhone mockup available here.

Try this UI control in action

Requirements

iOS 9.0+
Xcode 8

Installation

Just add the Source folder to your project.

or use CocoaPods with Podfile:

pod 'expanding-collection', '~> 1.0.3' swift 3

pod 'expanding-collection', '~> 0.3.2' swift 2

or Carthage users can simply add to their Cartfile:

github "Ramotion/expanding-collection"

Usage

import expanding_collection

Create CollectionViewCell

Create UICollectionViewCell inherit from BasePageCollectionCell (recommend create cell with xib file)
Adding FrontView

add a view to YOURCELL.xib and connect it to @IBOutlet weak var frontContainerView: UIView!
add width, height, centerX and centerY constraints (width and height constranints must equal cellSize)

connect centerY constraint to @IBOutlet weak var frontConstraintY: NSLayoutConstraint!
add any desired uiviews to frontView

Adding BackView

repeat step 2 (connect outlets to @IBOutlet weak var backContainerView: UIView!, @IBOutlet weak var backConstraintY: NSLayoutConstraint!)

Cell example DemoCell

If set `tag = 101` for any `FrontView.subviews` this view will be hidden during the transition animation

Create CollectionViewController

Create a UIViewController inheriting from ExpandingViewController
Register Cell and set Cell size:

override func viewDidLoad() {
    itemSize = CGSize(width: 214, height: 264)
    super.viewDidLoad()

    // register cell
    let nib = UINib(nibName: "NibName", bundle: nil)
    collectionView?.registerNib(nib, forCellWithReuseIdentifier: "CellIdentifier")
}

Add UICollectionViewDataSource methods

extension YourViewController {

  override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return items.count
  }

  override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("CellIdentifier"), forIndexPath: indexPath)
    // configure cell
    return cell
  }
}

Open Cell animation

override func viewDidLoad() {
    itemSize = CGSize(width: 214, height: 264)
    super.viewDidLoad()

    // register cell
    let nib = UINib(nibName: "CellIdentifier", bundle: nil)
    collectionView?.registerNib(nib, forCellWithReuseIdentifier: String(DemoCollectionViewCell))
}

func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
    cell.cellIsOpen(!cell.isOpened)
}

if you use this delegates method:

func collectionView(collectionView: UICollectionView, willDisplayCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath)

func scrollViewDidEndDecelerating(scrollView: UIScrollView)

must call super method:

func collectionView(collectionView: UICollectionView, willDisplayCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {
  super.collectionView(collectionView: collectionView, willDisplayCell cell: cell, forItemAtIndexPath indexPath: indexPath)
  // code
}

func scrollViewDidEndDecelerating(scrollView: UIScrollView) {
  super.scrollViewDidEndDecelerating(scrollView: scrollView)
  // code
}

Transition animation

Create a UITableViewController inheriting from ExpandingTableViewController
Set header height default 236

override func viewDidLoad() {
    super.viewDidLoad()
    headerHeight = ***
}

Call the push method in YourViewController to YourTableViewController

  if cell.isOpened == true {
    let vc: YourTableViewController = // ... create view controller  
    pushToViewController(vc)
  }

For back transition use popTransitionAnimation()

License

Expanding collection is released under the MIT license. See LICENSE for details.

RayanSaeed/expanding-collection