これは一週間中私に迷惑をかけていましたので、私はこの夕方に解決策を試してみました。私はあなたが必要と思うのは、注文が変更されたときに各セルのレイアウトを動的に調整できるコレクションビューのカスタムレイアウトマネージャです。
次のコードは明らかにあなたのレイアウトよりもはるかに荒いものを作り出しますが、基本的には、あなたが望む動作を達成します。セルが並べ替えられたときに新しいレイアウトに決定的に移動すると、
すべてのキーは、ビューコントローラのsourceData変数のdidSet関数です。この配列の値が変更されると(並べ替えボタンを押すことでジェスチャ認識子に近似しています)、必要なセル寸法の再計算が自動的にトリガされ、レイアウトがトリガーされて再計算され、データ。
ご不明な点がありましたら、お知らせください。それが役に立てば幸い!
更新:ありがとう、私はあなたが今何をしようとしているのか理解しており、添付の更新コードがあなたに届くと思います。組み込みのインタラクションメソッドを使用するのではなく、カスタムレイアウトマネージャを実装して委譲を使用する方が簡単だと思います。パンジェスチャレコグナイザがセルを選択すると、その単語に基づいてサブビューが作成されますジェスチャー。バックグラウンドで同時にデータソースから単語を削除し、レイアウトを更新します。ユーザーが単語を配置する場所を選択すると、そのプロセスを逆にして、デリゲートに単語をデータソースに挿入してレイアウトを更新するように指示します。ユーザーがコレクションビューの外にある単語または有効でない場所に単語をドラッグすると、その単語は開始位置に戻されます(オリジナルのインデックスをラベルのタグとして保存する狡猾なテクニックを使用します)。
あなたを助ける希望!
私は言語とサイムミスを犯してしまった場合、[ウィキペディアのテキスト礼儀]
import UIKit
class ViewController: UIViewController, bespokeCollectionViewControllerDelegate {
let sourceText : String = "So Midas, king of Lydia, swelled at first with pride when he found he could transform everything he touched to gold; but when he beheld his food grow rigid and his drink harden into golden ice then he understood that this gift was a bane and in his loathing for gold, cursed his prayer"
var sourceData : [String]! {
didSet {
refresh()
}
}
var sortedCVController : UICollectionViewController!
var sortedLayout : bespokeCollectionViewLayout!
var sortButton : UIButton!
var sortDirection : Int = 0
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
sortedLayout = bespokeCollectionViewLayout(contentWidth: view.frame.width - 200)
sourceData = {
let components = sourceText.components(separatedBy: " ")
return components
}()
sortedCVController = bespokeCollectionViewController(sourceData: sourceData, collectionViewLayout: sortedLayout, frame: CGRect(origin: CGPoint(x: 100, y: 100), size: CGSize(width: view.frame.width - 200, height: view.frame.height - 200)))
(sortedCVController as! bespokeCollectionViewController).delegate = self
sortedCVController.collectionView!.frame = CGRect(origin: CGPoint(x: 100, y: 100), size: CGSize(width: view.frame.width - 200, height: view.frame.height - 200))
sortButton = {
let sB : UIButton = UIButton(frame: CGRect(origin: CGPoint(x: 25, y: 100), size: CGSize(width: 50, height: 50)))
sB.setTitle("Sort", for: .normal)
sB.setTitleColor(UIColor.black, for: .normal)
sB.addTarget(self, action: #selector(sort), for: .touchUpInside)
sB.layer.borderColor = UIColor.black.cgColor
sB.layer.borderWidth = 1.0
return sB
}()
view.addSubview(sortedCVController.collectionView!)
view.addSubview(sortButton)
}
func refresh() -> Void {
let dimensions : [CGSize] = {
var d : [CGSize] = [CGSize]()
let font = UIFont.systemFont(ofSize: 17)
let fontAttributes = [NSFontAttributeName : font]
for item in sourceData {
let stringSize = ((item + " ") as NSString).size(attributes: fontAttributes)
d.append(CGSize(width: stringSize.width, height: stringSize.height))
}
return d
}()
if self.sortedLayout != nil {
sortedLayout.dimensions = dimensions
if let _ = sortedCVController {
(sortedCVController as! bespokeCollectionViewController).sourceData = sourceData
}
self.sortedLayout.cache.removeAll()
self.sortedLayout.prepare()
if let _ = self.sortedCVController {
self.sortedCVController.collectionView?.reloadData()
}
}
}
func sort() -> Void {
sourceData = sortDirection > 0 ? sourceData.sorted(by: { $0 > $1 }) : sourceData.sorted(by: { $0 < $1 })
sortDirection = sortDirection + 1 > 1 ? 0 : 1
}
func didMoveWord(atIndex: Int) {
sourceData.remove(at: atIndex)
}
func didPlaceWord(word: String, atIndex: Int) {
print(atIndex)
if atIndex >= sourceData.count {
sourceData.append(word)
}
else
{
sourceData.insert(word, at: atIndex)
}
}
func pleaseRefresh() {
refresh()
}
}
protocol bespokeCollectionViewControllerDelegate {
func didMoveWord(atIndex: Int) -> Void
func didPlaceWord(word: String, atIndex: Int) -> Void
func pleaseRefresh() -> Void
}
class bespokeCollectionViewController : UICollectionViewController {
var sourceData : [String]
var movingLabel : UILabel!
var initialOffset : CGPoint!
var delegate : bespokeCollectionViewControllerDelegate!
init(sourceData: [String], collectionViewLayout: bespokeCollectionViewLayout, frame: CGRect) {
self.sourceData = sourceData
super.init(collectionViewLayout: collectionViewLayout)
self.collectionView = UICollectionView(frame: frame, collectionViewLayout: collectionViewLayout)
self.collectionView?.backgroundColor = UIColor.white
self.collectionView?.layer.borderColor = UIColor.black.cgColor
self.collectionView?.layer.borderWidth = 1.0
self.installsStandardGestureForInteractiveMovement = false
let pangesture = UIPanGestureRecognizer(target: self, action: #selector(handlePanGesture(gesture:)))
self.collectionView?.addGestureRecognizer(pangesture)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func handlePanGesture(gesture: UIPanGestureRecognizer) {
guard let _ = delegate else { return }
switch gesture.state {
case UIGestureRecognizerState.began:
guard let selectedIndexPath = self.collectionView?.indexPathForItem(at: gesture.location(in: self.collectionView)) else { break }
guard let selectedCell : UICollectionViewCell = self.collectionView?.cellForItem(at: selectedIndexPath) else { break }
initialOffset = gesture.location(in: selectedCell)
let index : Int = {
var i : Int = 0
for sectionCount in 0..<selectedIndexPath.section {
i += (self.collectionView?.numberOfItems(inSection: sectionCount))!
}
i += selectedIndexPath.row
return i
}()
movingLabel = {
let mL : UILabel = UILabel()
mL.font = UIFont.systemFont(ofSize: 17)
mL.frame = selectedCell.frame
mL.textColor = UIColor.black
mL.text = sourceData[index]
mL.layer.borderColor = UIColor.black.cgColor
mL.layer.borderWidth = 1.0
mL.backgroundColor = UIColor.white
mL.tag = index
return mL
}()
self.collectionView?.addSubview(movingLabel)
delegate.didMoveWord(atIndex: index)
case UIGestureRecognizerState.changed:
if let _ = movingLabel {
movingLabel.frame.origin = CGPoint(x: gesture.location(in: self.collectionView).x - initialOffset.x, y: gesture.location(in: self.collectionView).y - initialOffset.y)
}
case UIGestureRecognizerState.ended:
print("Interactive movement ended")
if let selectedIndexPath = self.collectionView?.indexPathForItem(at: gesture.location(in: self.collectionView)) {
guard let _ = movingLabel else { return }
let index : Int = {
var i : Int = 0
for sectionCount in 0..<selectedIndexPath.section {
i += (self.collectionView?.numberOfItems(inSection: sectionCount))!
}
i += selectedIndexPath.row
return i
}()
delegate.didPlaceWord(word: movingLabel.text!, atIndex: index)
UIView.animate(withDuration: 0.25, animations: {
self.movingLabel.alpha = 0
self.movingLabel.removeFromSuperview()
}, completion: { _ in
self.movingLabel = nil })
}
else
{
if let _ = movingLabel {
delegate.didPlaceWord(word: movingLabel.text!, atIndex: movingLabel.tag)
UIView.animate(withDuration: 0.25, animations: {
self.movingLabel.alpha = 0
self.movingLabel.removeFromSuperview()
}, completion: { _ in
self.movingLabel = nil })
}
}
default:
collectionView?.cancelInteractiveMovement()
print("Interactive movement canceled")
}
}
override func numberOfSections(in collectionView: UICollectionView) -> Int {
guard !(self.collectionViewLayout as! bespokeCollectionViewLayout).cache.isEmpty else { return 0 }
return (self.collectionViewLayout as! bespokeCollectionViewLayout).cache.last!.indexPath.section + 1
}
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
guard !(self.collectionViewLayout as! bespokeCollectionViewLayout).cache.isEmpty else { return 0 }
var n : Int = 0
for element in (self.collectionViewLayout as! bespokeCollectionViewLayout).cache {
if element.indexPath.section == section {
if element.indexPath.row > n {
n = element.indexPath.row
}
}
}
print("Section \(section) has \(n) elements")
return n + 1
}
override func collectionView(_ collectionView: UICollectionView, moveItemAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
let change = sourceData[sourceIndexPath.row]
sourceData.remove(at: sourceIndexPath.row)
sourceData.insert(change, at: destinationIndexPath.row)
}
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
// Clean
for subview in cell.subviews {
subview.removeFromSuperview()
}
let label : UILabel = {
let l : UILabel = UILabel()
l.font = UIFont.systemFont(ofSize: 17)
l.frame = CGRect(origin: CGPoint.zero, size: cell.frame.size)
l.textColor = UIColor.black
let index : Int = {
var i : Int = 0
for sectionCount in 0..<indexPath.section {
i += (self.collectionView?.numberOfItems(inSection: sectionCount))!
}
i += indexPath.row
return i
}()
l.text = sourceData[index]
return l
}()
cell.addSubview(label)
return cell
}
}
class bespokeCollectionViewLayout : UICollectionViewLayout {
var cache : [UICollectionViewLayoutAttributes] = [UICollectionViewLayoutAttributes]()
let contentWidth: CGFloat
var dimensions : [CGSize]!
init(contentWidth: CGFloat) {
self.contentWidth = contentWidth
super.init()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func prepare() -> Void {
guard self.dimensions != nil else { return }
if cache.isEmpty {
var xOffset : CGFloat = 0
var yOffset : CGFloat = 0
var rowCount = 0
var wordCount : Int = 0
while wordCount < dimensions.count {
let nextRowCount : Int = {
var totalWidth : CGFloat = 0
var numberOfWordsInRow : Int = 0
while totalWidth < contentWidth && wordCount < dimensions.count {
if totalWidth + dimensions[wordCount].width >= contentWidth {
break
}
else
{
totalWidth += dimensions[wordCount].width
wordCount += 1
numberOfWordsInRow += 1
}
}
return numberOfWordsInRow
}()
var columnCount : Int = 0
for count in (wordCount - nextRowCount)..<wordCount {
let index : IndexPath = IndexPath(row: columnCount, section: rowCount)
let newAttribute : UICollectionViewLayoutAttributes = UICollectionViewLayoutAttributes(forCellWith: index)
let cellFrame : CGRect = CGRect(origin: CGPoint(x: xOffset, y: yOffset), size: dimensions[count])
newAttribute.frame = cellFrame
cache.append(newAttribute)
xOffset += dimensions[count].width
columnCount += 1
}
xOffset = 0
yOffset += dimensions[0].height
rowCount += 1
}
}
}
override var collectionViewContentSize: CGSize {
guard !cache.isEmpty else { return CGSize(width: 100, height: 100) }
return CGSize(width: self.contentWidth, height: cache.last!.frame.maxY)
}
override func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
var layoutAttributes = [UICollectionViewLayoutAttributes]()
if cache.isEmpty {
self.prepare()
}
for attributes in cache {
if attributes.frame.intersects(rect) {
layoutAttributes.append(attributes)
}
}
return layoutAttributes
}
}
申し訳ありませんが、私は – ale00