我有一个带有单元格的全屏 UICollectionView。我检查了宽度和高度， View 覆盖了整个屏幕。但是，当我启用分页时， View 是 no longer centered .如何设置单元格或 Collection View 的中心，使其占据整个屏幕？
import UIKit
class ShowPictures: UIViewController, UICollectionViewDelegateFlowLayout, UICollectionViewDataSource {
var PICTURES: [Picture] = []
@IBAction func swipeAway(_ sender: Any) {
self.dismiss(animated: true, completion: nil)
}
override var prefersStatusBarHidden: Bool {
return true
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 0
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 0
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 1
}
private func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return UIScreen.main.bounds.size
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
return self.PICTURES.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let item: Messages.MessageAdapter.Item.Picture = self.PICTURES[indexPath.section]
let cell: Cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! Cell
return cell
}
@IBAction func CloseController(_ sender: Any) {
dismiss(animated: true, completion: nil)
}
}
class Cell: UICollectionViewCell, UIScrollViewDelegate {
@IBOutlet weak var _image: UIImageView!
@IBOutlet weak var _scroll: UIScrollView!
override func layoutSubviews() {
self._scroll.delegate = self
self._scroll.zoomScale = CGFloat(integerLiteral: 1)
}
func viewForZooming(in scrollView: UIScrollView) -> UIView? {
return self._image
}
}
最佳答案
添加以下委托(delegate)方法以删除插图:
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
return .zero
}
关于ios - UICollectionView 不会居中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55896652/