如何在UICollectionView中更改单元格之间的空间？

Question

我想减少行中单元格之间的大小.现在它看起来像:

我正在尝试这个,以减少它们之间的大小:

let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 20, left: 2, bottom: 10, right: 2)
layout.minimumInteritemSpacing = 0
layout.minimumLineSpacing = 0

但它对我没有帮助.我做错了什么？

Answer 1

//Objective c
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
        return CGSizeMake((collectionView.frame.size.width/3)-20, 100);
    }

// Swift 2.0

func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
    return CGSizeMake((collectionView.frame.size.width / 3) - 20, 100)
}

// Swift 3.0
override func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    return CGSize(width: CGFloat((collectionView.frame.size.width / 3) - 20), height: CGFloat(100))
}

Answer 2

转到故事板,右键单击集合视图和

并检查单元格之间的最小间距,并将其减小到零.

Answer 3

在您的代码中,您必须为集合视图创建一个IBOutlet,然后分配collectionViewLayout:

let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
layout.sectionInset = UIEdgeInsets(top: 20, left: 2, bottom: 10, right: 2)
layout.minimumInteritemSpacing = 0
layout.minimumLineSpacing = 0
collectionView!.collectionViewLayout = layout