回答編集履歴
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codeの入力ミス
answer
CHANGED
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@@ -1,33 +1,5 @@
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```Swift
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2
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-
override func viewDidLoad() {
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3
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super.viewDidLoad()
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4
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-
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5
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OnGame = true
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6
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self.collectionView.delegate = self
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7
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self.collectionView.dataSource = self
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8
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-
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9
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let layout = UICollectionViewFlowLayout()
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layout.sectionInset = UIEdgeInsets(top: 15, left: 15, bottom: 15, right: 15)
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collectionView.collectionViewLayout = layout
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12
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-
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if !timer.isValid {
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14
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timer = Timer.scheduledTimer(timeInterval:0.01,target: self,selector: #selector(self.down),userInfo:nil,repeats:true)
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15
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}
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-
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self.collectionView!.register(UICollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)
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}
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@objc func changeColor() {
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let redCellIndex: Int = Int.random(in: 0..<12)
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collectionView.reloadData()
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}
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// 中略
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24
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-
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25
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-
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2
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+
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
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let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
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27
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-
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28
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cell.backgroundColor = self.redCellIndex == indexPath.row ? .red : .black
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4
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30
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return cell
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31
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-
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32
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}
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33
5
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```
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