点击时展开 UICollectionView 及其单元格

我正在尝试制作一个过渡动画，如链接中的演示here https://dribbble.com/shots/2733571-Citadela-countries。因此，当我单击该单元格时，它会展开并覆盖整个屏幕。

这是我的代码（我不得不承认我对 CollectionView 不熟悉）`

import UIKit

class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {

@IBOutlet weak var mainDesLabel: UILabel!
@IBOutlet weak var collectionView: UICollectionView!
@IBOutlet weak var secDesLabel: UILabel!
let searchBar = UISearchBar()

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    self.collectionView.delegate   = self
    self.collectionView.dataSource = self
    self.collectionView.backgroundColor = UIColor.clearColor()
    ////////////////////////////////////////////////////////////////////////
    self.searchBar.frame = CGRect(x: 175, y: 0, width: 200, height: 50)
    self.searchBar.searchBarStyle = UISearchBarStyle.Minimal
    self.searchBar.backgroundColor = UIColor.whiteColor()
    self.view.addSubview(searchBar)
    ////////////////////////////////////////////////////////////////////////
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return 10
}

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as UICollectionViewCell

    cell.layer.cornerRadius = 5

    return cell
}



func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
    return 1
}

//Use for size
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
    self.collectionView.frame = self.view.bounds
    let cell = collectionView.cellForItemAtIndexPath(indexPath)
    cell!.frame = CGRectMake(0, 0, self.view.bounds.width, self.view.bounds.height)
}


}

所以我认为使用“didSelectItemAtIndexPath”会有所帮助，但事实证明this https://i.stack.imgur.com/MxR8F.png

想法？任何帮助将不胜感激！

或者您可以做的是展开项目并使用 UIAnimation 更改其框架。

当点击单元格时，您还可以使用自动布局来扩展单元格内的视图，我正在暗示（剪辑到边界）。

像这样的东西：

override func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {

    let item = collectionView.cellForItemAtIndexPath(indexPath) as! cellCollectionViewExpress  // or whatever you collection view cell class name is.

    UIView.animateWithDuration(1.0, animations: {
        self.view.bringSubviewToFront(collectionView)
        collectionView.bringSubviewToFront(item)
        item.frame.origin = self.view.frame.origin   /// this view origin will be at the top of the scroll content, you'll have to figure this out
        item.frame.size.width = self.view.frame.width
        item.frame.size.height = self.view.frame.height
    })
}

我建议您使用 UICollectionView Controller，因此使用它通常会很轻松。