我将collectionview拖到我的xib上,将约束设置为Leading,Trailing,top和height。
编码部分为...
override func viewDidLoad() {
super.viewDidLoad()
let layout = UICollectionViewFlowLayout()
layout.minimumLineSpacing = 5
layout.minimumInteritemSpacing = 5
collectionview2.delegate = self
collectionview2.dataSource = self
collectionview2.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "ident")
}
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 5
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
switch indexPath.item {
case 0,1:
return CGSize(width: (UIScreen.main.bounds.width - 16) / 2, height: (UIScreen.main.bounds.width - 16) / 2)
default:
return CGSize(width: (UIScreen.main.bounds.width - 32) / 3, height: (UIScreen.main.bounds.width) / 3)
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ident", for: indexPath)
cell.backgroundColor = .red
return cell
}
This是我引用的链接。 但这不起作用,我看到一个接一个的五个相等的宽度和高度单元。
我在做什么错...?
编辑1: 我还想在左侧显示一个长单元格,在右侧显示2个小单元格,像这样...
答案 0 :(得分:1)
您的代码看上去很完美,但是您可能忘记了确认FlowLayout协议。 所以, 您只需要在代码中确认以下协议即可,
UICollectionViewDelegateFlowLayout
希望这样可以帮助您。
答案 1 :(得分:0)
您必须尝试一下
确认UICollectionViewDelegateFlowLayout
例如
class yourViewController: UIViewController,UICollectionViewDelegateFlowLayout
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let screeSize = UIScreen.main.bounds
let numOfCell:Int = 3 //Number of items you want
let spaceOfCell:CGFloat = (CGFloat((numOfCell + 1)*10)) //Space between Cells
return CGSize(width: Int(screeSize.width - spaceOfCell) / numOfCell, height: Int(screeSize.width - spaceOfCell) / numOfCell)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 10.00
//Verticle space between line
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 10.00 //Space Between Items You want
}
希望它会有所帮助:)