swift – 如何设置单元格间距和UICollectionView – UICollectio
发布时间:2020-12-14 06:10:52 所属栏目:百科 来源:网络整理
导读:我试图添加UICollectionView到ViewController,我需要有3个单元格“每行”,单元格之间没有空格(它应该看起来像一个网格)。单元格宽度应该是屏幕大小的三分之一,因此我认为layout.item宽度应该是相同的。但是我得到这个: 如果我减小那个大小(例如7或8像素)
我试图添加UICollectionView到ViewController,我需要有3个单元格“每行”,单元格之间没有空格(它应该看起来像一个网格)。单元格宽度应该是屏幕大小的三分之一,因此我认为layout.item宽度应该是相同的。但是我得到这个:
如果我减小那个大小(例如7或8像素),它是更好的,但行中的第三个单元格不是完全可见的,我仍然有空白空间(顶部&底部,左&右)。 class ViewController: UIViewController,UICollectionViewDelegateFlowLayout,UICollectionViewDataSource { var collectionView: UICollectionView? var screenSize: CGRect! var screenWidth: CGFloat! var screenHeight: CGFloat! override func viewDidLoad() { super.viewDidLoad() screenSize = UIScreen.mainScreen().bounds screenWidth = screenSize.width screenHeight = screenSize.height // Do any additional setup after loading the view,typically from a nib let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout() layout.sectionInset = UIEdgeInsets(top: 20,left: 0,bottom: 10,right: 0) layout.itemSize = CGSize(width: screenWidth / 3,height: screenWidth / 3) collectionView = UICollectionView(frame: self.view.frame,collectionViewLayout: layout) collectionView!.dataSource = self collectionView!.delegate = self collectionView!.registerClass(CollectionViewCell.self,forCellWithReuseIdentifier: "CollectionViewCell") collectionView!.backgroundColor = UIColor.greenColor() self.view.addSubview(collectionView!) } func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int { return 1 } func collectionView(collectionView: UICollectionView,numberOfItemsInSection section: Int) -> Int { return 20 } func collectionView(collectionView: UICollectionView,cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell { let cell = collectionView.dequeueReusableCellWithReuseIdentifier("CollectionViewCell",forIndexPath: indexPath) as CollectionViewCell cell.backgroundColor = UIColor.whiteColor() cell.layer.borderColor = UIColor.blackColor().CGColor cell.layer.borderWidth = 0.5 cell.frame.size.width = screenWidth / 3 cell.frame.size.height = screenWidth / 3 cell.textLabel?.text = "(indexPath.section):(indexPath.row)" return cell } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } }
添加这2行
layout.minimumInteritemSpacing = 0 layout.minimumLineSpacing = 0 所以你有: // Do any additional setup after loading the view,typically from a nib. let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout() layout.sectionInset = UIEdgeInsets(top: 20,right: 0) layout.itemSize = CGSize(width: screenWidth/3,height: screenWidth/3) layout.minimumInteritemSpacing = 0 layout.minimumLineSpacing = 0 collectionView!.collectionViewLayout = layout 这将删除所有的空格,并给你一个网格布局: 如果您希望第一列的宽度等于屏幕宽度,则添加以下函数: func collectionView(collectionView: UICollectionView,layout collectionViewLayout: UICollectionViewLayout,sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize { if indexPath.row == 0 { return CGSize(width: screenWidth,height: screenWidth/3) } return CGSize(width: screenWidth/3,height: screenWidth/3); } 网格布局现在看起来像(我还添加了第一个单元格的蓝色背景): (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |