首页 > 解决方案 > selectItem 时的集合视图布局错误(Swift 5)

问题描述

从 viewDidLoad 布局中选择单元格后更改

在选择单元格之前

在选择单元格之前

选择单元格后

let indexPath = IndexPath(row: SelectedFolderIndex, section: 0)       
collectionView.selectItem(at: indexPath, animated: false, scrollPosition: .centeredVertically)

选择单元格后

布局

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    return CGSize(width: collectionView.frame.width/2.2, height: 55)
}

ViewDidLoad

let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 7, left: 12, bottom: 12, right: 12)
layout.minimumInteritemSpacing = 5
layout.minimumLineSpacing = 11
collectionView!.collectionViewLayout = layout
collectionView.delegate = self
collectionView.dataSource = self
collectionView.allowsMultipleSelection = false

标签: swiftlayoutuicollectionviewswift5swift5.2

解决方案


您需要从单元格宽度中剪切插图和间距:

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    let width = (collectionView.frame.width/2.2) - 2*12 - 11
    return CGSize(width: width, height: 55)
}

推荐阅读