expanding-collection

环境需求

iOS 9.0+
Xcode 9.0+

安装方式

只需将Source文件夹添加到您的项目.

或者使用 CocoaPods ，Podfile 文件中添加以下一行:

pod 'expanding-collection'

or Carthage Cartfile 文件添加以下一行:

github "Ramotion/expanding-collection"

使用方法

import expanding_collection

创建 CollectionViewCell

创建UICollectionViewCell继承自BasePageCollectionCell(建议使用xib文件创建cell)
添加前视图FrontView
添加一个视图到您的单元格。连接到

@IBOutlet weak var frontContainerView: UIView!

添加宽度、高度、centerX和centerY约束(宽度和高度约束必须等于单元格大小)

将centerY约束连接到

 @IBOutlet weak var frontConstraintY: NSLayoutConstraint!

添加任何想要的UIView到frontView

添加BackView

重复步骤2(将outlet连接到

@IBOutlet weak var backContainerView: UIView!，
@IBOutlet weak var backConstraintY: NSLayoutConstraint!

)

Cell example DemoCell

如果对任何FrontView设置tag = 101。此视图将在转换动画期间隐藏

创建 CollectionViewController

创建一个继承自ExpandingViewController的UIViewController
注册单元格和设置单元格大小:

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")
}

添加UICollectionViewDataSource方法

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
  }
}

打开Cell动画

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)
}

如果使用委托方法:

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

func scrollViewDidEndDecelerating(scrollView: UIScrollView)


必须调用超方法:
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
}

过渡动画

创建一个继承自ExpandingTableViewController的UITableViewController
设置标题高度默认236

override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
    super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
    headerHeight = ***
}

或者

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
    headerHeight = ***
}

调用viewcontroller中的push方法到tableviewcontroller

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

对于反向转换，使用popTransitionAnimation()

Expanding Collection - Swift