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
如果细胞计数为5
如果细胞计数为9
如果细胞计数是11
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。
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。
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