问题
I found something strange.
I created a custom UICollectionViewCell and a label inside it.
I applied auto-layout only to the top, leading, and bottom of the label.
class TestCollectionViewCell: UICollectionViewCell {
@IBOutlet weak var label: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
}
}
And if the text is long, it is clipped off the screen like below.
I want the text to be displayed as just "..." if it is too long.
So I applied traling auto-layout like this.
Then, collectionViewCell width is broke.
This is my code.
I already set delegate, datasource.
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
}
extension ViewController: UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 20
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as? TestCollectionViewCell else { return UICollectionViewCell() }
cell.label.text = "asdfasdkfjabsdkljfbasdfhaoweihf;oaisefowiejfao;wihfaksdjfhakdjf;lskdjfa;zxknb"
return cell
}
}
extension ViewController: UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: (collectionView.frame.width - 1) / 2, height: 53)
}
}
回答1:
Open Storyboard and select your CollectionView.
Now open Size inspector and change Estimated size Automatic to None.
Hope this will work.
回答2:
Try calculating size of cell as:
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: (UIScreen.main.bounds.width - 1) / 2, height: 53)
}
回答3:
You can set the size of the cell using UICollectionViewFlowLayout()
In your viewDidLoad
override func viewDidLoad() {
collectionView.dataSource = self
let layout = UICollectionViewFlowLayout()
layout.itemSize = CGSize(width: (collectionView.frame.width - 1) / 2, height: 53)
collectionView.setCollectionViewLayout(layout, animated: true)
}
来源：https://stackoverflow.com/questions/60755978/uicollectionviewcell-is-wrong-width-with-label