UICollectionView 单元格间距不再起作用

Question

我已经在这个应用程序上工作了几天，我正在努力布置一个 UICollectionView，使其看起来像一个单元格之间没有间距的网格。在我找到并将其实现到我自己的程序中后，它运行得非常好。我处理了一些其他文件并更新了我的计算机，然后我回来测试了这个应用程序只是为了看看我在哪里，由于某种原因，单元格之间存在水平间距。我已经查看了其他一些与此类似的问题，但我只是想知道如何解决这个问题以及为什么在我没有更改与布局相关的任何内容时会发生这种情况。

这是现在的样子：

import UIKit

class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {

@IBOutlet weak var collectionView: UICollectionView!

var model = BoardModel()
var board = Board()

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    collectionView.delegate = self
    collectionView.dataSource = self

    board = model.newGame(4, 4)

    // Remove the spacing between the cells in collectionView
    // Also make the cells the correct size to form a square/rectangle
    let screenSize: CGRect! = collectionView.bounds
    let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
    layout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
    layout.itemSize = CGSize(width: screenSize.width/CGFloat(board.columns), height: screenSize.width/CGFloat(board.columns))
    layout.minimumInteritemSpacing = 0
    layout.minimumLineSpacing = 0
    collectionView!.collectionViewLayout = layout

    // Center the collectionView
    collectionView.contentInset.top = max((collectionView.frame.height - collectionView.contentSize.height) / 5, 0)

}

我使用 collectionView 边界而不是 UIScreen.mainScreen().bounds 的原因是因为我的 collectionView 在所有边缘周围有 20 个间距。

Answer 1

你能试试吗

let width = UIScreen.main.bounds.width - 40 // convert it if it's not swift 4
let height = UIScreen.main.bounds.height - 40

//

或实施

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {

     return CGSize.init(width:  , height:  )
}

Answer 2

import UIKit

class ViewController: UIViewController {
    fileprivate let sectionInsets = UIEdgeInsets(top: 5.0, left: 5.0, bottom: 5.0, right: 5.0)
    fileprivate let itemsPerRow: CGFloat = 2

  override func viewDidLoad() {
        super.viewDidLoad()
}

}
// MARK: UICollectionViewDelegateFlowLayout

extension ViewController : UICollectionViewDelegateFlowLayout {


    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize{
        let paddingSpace = sectionInsets.left * (itemsPerRow + 1)
        let availableWidth = view.frame.width - paddingSpace
        let widthPerItem = availableWidth / itemsPerRow
        let heightPerItem = widthPerItem + 21

        return CGSize(width: widthPerItem, height: heightPerItem)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets{
        return sectionInsets
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat{
        return sectionInsets.left
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat{

        return 0
    }

}

UICollectionView 单元格间距不再起作用

UICollectionView cell spacing not working anymore

ios

uicollectionview

uicollectionviewcell

uicollectionviewlayout

swift