我如何在UICollectionView的一个部分设置单元格间距?我知道有一个属性minimumInteritemSpacing,我已经将它设置为5.0,但间距仍然没有出现5.0。我已经实现了flowout委托方法。
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section
{
return 5.0;
}
我仍然没有得到想要的结果。我认为这是最小间距。有没有什么方法可以设置最大间距?
试试下面的代码,确保每个项目之间的间距为5px:
- (UIEdgeInsets)collectionView:(UICollectionView *) collectionView
layout:(UICollectionViewLayout *) collectionViewLayout
insetForSectionAtIndex:(NSInteger) section {
return UIEdgeInsetsMake(0, 0, 0, 5); // top, left, bottom, right
}
- (CGFloat)collectionView:(UICollectionView *) collectionView
layout:(UICollectionViewLayout *) collectionViewLayout
minimumInteritemSpacingForSectionAtIndex:(NSInteger) section {
return 5.0;
}
我在Swift 3单元格间距的解决方案,如Instagram:
lazy var collectionView: UICollectionView = {
let layout = UICollectionViewFlowLayout()
let cv = UICollectionView(frame: .zero, collectionViewLayout: layout)
cv.backgroundColor = UIColor.rgb(red: 227, green: 227, blue: 227)
cv.showsVerticalScrollIndicator = false
layout.scrollDirection = .vertical
layout.minimumLineSpacing = 1
layout.minimumInteritemSpacing = 1
return cv
}()
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
switch UIDevice.current.modelName {
case "iPhone 4":
return CGSize(width: 106, height: 106)
case "iPhone 5":
return CGSize(width: 106, height: 106)
case "iPhone 6,7":
return CGSize(width: 124, height: 124)
case "iPhone Plus":
return CGSize(width: 137, height: 137)
default:
return CGSize(width: frame.width / 3, height: frame.width / 3)
}
}
如何编程检测设备:
https://stackoverflow.com/a/26962452/6013170
回答Swift 3.0, Xcode 8
1.确保你设置了集合视图委托
class DashboardViewController: UIViewController {
@IBOutlet weak var dashboardCollectionView: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
dashboardCollectionView.delegate = self
}
}
2.实现uicollectionviewdelegatflowlayout协议,而不是UICollectionViewDelegate。
extension DashboardViewController: UICollectionViewDelegateFlowLayout {
fileprivate var sectionInsets: UIEdgeInsets {
return .zero
}
fileprivate var itemsPerRow: CGFloat {
return 2
}
fileprivate var interitemSpace: CGFloat {
return 5.0
}
func collectionView(_ collectionView: UICollectionView,
layout collectionViewLayout: UICollectionViewLayout,
sizeForItemAt indexPath: IndexPath) -> CGSize {
let sectionPadding = sectionInsets.left * (itemsPerRow + 1)
let interitemPadding = max(0.0, itemsPerRow - 1) * interitemSpace
let availableWidth = collectionView.bounds.width - sectionPadding - interitemPadding
let widthPerItem = availableWidth / itemsPerRow
return CGSize(width: widthPerItem, height: widthPerItem)
}
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 0.0
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return interitemSpace
}
}