动态修复屏幕中的UICollectionView单元格

问题描述 投票:2回答:1

我正在开发一个tvOS应用程序,我想修复电视屏幕中的所有单元格,而无需垂直或水平滚动。这里细胞计数将是动态的,这是主要问题。我想设置这样的所有单元格

例如:如果细胞计数为4

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如果细胞计数为5

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如果细胞计数为9

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如果细胞计数是11

enter image description here

这里动态地需要设置列和行以及单元格的高度和宽度。(不允许滚动)

我的代码是:

//Example array
var collectionViewArray:[UIColor] = [.brown, .red, .purple, .lightGray, .yellow, .black, .cyan, .magenta, .orange, .purple, .lightGray]

override func viewDidAppear(_ animated: Bool) {
    myCollectionView.delegate = self
    myCollectionView.dataSource = self

}

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

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! TVMenuCollectionViewCell
    cell.cellView.backgroundColor = collectionViewArray[indexPath.row]
 return cell
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {

    let screenWidth = collectionView.bounds.width
    let screenHeight = collectionView.bounds.height
 return CGSize(width: (screenWidth-50)/4, height: (screenHeight-40)/3)
}

实际上如果单元格数量更多,我需要N x(N-1)列和行。

swift uicollectionview uicollectionviewcell tvos uicollectionviewflowlayout
1个回答
1
投票

工作代码Swift 4

你需要像这样使用UICollectionViewDelegateFlowLayout方法

class CardListViewController:UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout{

    // UICollectionViewDelegateFlowLayout Delegate method

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize
    {
        let screenWidth = collectionView.bounds.width
        let screenHeight = collectionView.bounds.height

        if 0 ... 4 ~= collectionViewArray.count{
           return CGSize(width: (screenWidth - 30) / 2, height: (screenHeight - 30) / 2)
        }else if 5 ... 9 ~= collectionViewArray.count{
            return CGSize(width: (screenWidth - 40) / 3, height: (screenHeight - 40) / 2)
        }else{
            return CGSize(width: (screenWidth - 50) / 4, height: (screenHeight - 50) / 2)
        }
    }
}

从故事板设置部分插入像这样。

enter image description here

产量

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