[英]Constraints don't work on UICollectionView
看起来像单元格大小和视图大小不匹配,因为您没有提到该单元格。
在这种情况下,请关闭“收集视图流布局”,然后相应地调整像元大小。
@IBOutlet weak var collView: UICollectionView!
@IBOutlet weak var collLayout: UICollectionViewFlowLayout!
override func viewDidLayoutSubviews() {
var w = self.view.frame.width
if #available(iOS 11.0, *) {
w = self.view.safeAreaLayoutGuide.layoutFrame.width
}
let padding:CGFloat = 20
let spacing:CGFloat = 5
let columns:CGFloat = 6
let cw = ceil((w - padding) / columns)
collLayout.itemSize = CGSize(width: cw - spacing*2, height: cw - spacing*2)
collLayout.minimumLineSpacing = spacing
collLayout.minimumInteritemSpacing = spacing
super.viewDidLayoutSubviews()
}
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