请检查此随附的代码和屏幕简短。当我设置容器视图的颜色时,它工作正常,但是当我在单元格中添加UIImage时,它就无法工作。我更改了imageview内容模式,但无法正常工作。
class ViewController: UIViewController {
@IBOutlet weak var segColumn: UISegmentedControl!
@IBOutlet weak var collectionView: UICollectionView!
fileprivate var items: [UIImage] = [ // My images ]
override func viewDidLoad() {
super.viewDidLoad()
self.setup()
}
}
extension ViewController: UICollectionViewDataSource{
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return items.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CollectionViewCell
cell.imgCell.image = items[indexPath.row]
cell.imgCell.contentMode = .scaleAspectFill
cell.contentView.backgroundColor = .red
return cell
}
}
extension ViewController: UICollectionViewDelegateFlowLayout{
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: (collectionView.bounds.width/3 - 2), height: (collectionView.bounds.width/3))
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 2
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 2
}
}
可能是因为红色在图像上占主导地位
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CollectionViewCell
cell.imgCell.image = items[indexPath.row]
cell.imgCell.contentMode = .scaleAspectFill
cell.contentView.backgroundColor = .red
return cell
}
尝试:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CollectionViewCell
cell.contentView.backgroundColor = .red
cell.imgCell.image = items[indexPath.row]
cell.imgCell.contentMode = .scaleAspectFill
return cell
}