UICollectionViewFlexLayout 1.2.0

UICollectionViewFlexLayout

UICollectionViewFlexLayout 是 UICollectionViewFlowLayout 的即时替代品。

特性

基本概念

不要让单元格有边距和填充。单元条的尺寸现在在单元条之外设置。只需关注内容。

使用方式

UICollectionViewDelegateFlexLayout

protocol UICollectionViewDelegateFlexLayout {
  // section vertical spacing
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewFlexLayout, verticalSpacingBetweenSectionAt section: Int, and nextSection: Int) -> CGFloat

  // section margin
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewFlexLayout, marginForSectionAt section: Int) -> UIEdgeInsets

  // section padding
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewFlexLayout, paddingForSectionAt section: Int) -> UIEdgeInsets

  // item horizontal spacing
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewFlexLayout, horizontalSpacingBetweenItemAt indexPath: IndexPath, and nextIndexPath: IndexPath) -> CGFloat

  // item vertical spacing
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewFlexLayout, verticalSpacingBetweenItemAt indexPath: IndexPath, and nextIndexPath: IndexPath) -> CGFloat

  // item margin
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewFlexLayout, marginForItemAt indexPath: IndexPath) -> UIEdgeInsets

  // item padding
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewFlexLayout, paddingForItemAt indexPath: IndexPath) -> UIEdgeInsets

  // item size
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewFlexLayout, sizeForItemAt indexPath: IndexPath) -> CGSize

  // item z-index
  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewFlexLayout, zIndexForItemAt indexPath: IndexPath) -> Int
}

分区和项目背景

// register
collectionView.register(MySectionBackgroundView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionBackground, withReuseIdentifier: "mySectionBackgroundView")
collectionView.register(MyItemBackgroundView.self, forSupplementaryViewOfKind: UICollectionElementKindItemBackground, withReuseIdentifier: "myItemBackgroundView")

// configure
func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
  switch kind {
  case UICollectionElementKindSectionBackground: // section background
    return collectionView.dequeueReusableSupplementaryView(ofKind: UICollectionElementKindSectionBackground, withReuseIdentifier: "mySectionBackgroundView", for: indexPath)

  case UICollectionElementKindItemBackground: // item background
    return collectionView.dequeueReusableSupplementaryView(ofKind: UICollectionElementKindItemBackground, withReuseIdentifier: "myItemBackgroundView", for: indexPath)

  case foo: // else
    return bar
  }
}

技巧与窍门

与RxCocoa一起使用

如果你在使用与RxSwift和RxCocoa配合的UICollectionView，你应该扩展_RXDelegateProxy类以支持代理委托。
```
import RxCocoa
import UICollectionViewFlexLayout

extension _RXDelegateProxy: UICollectionViewDelegateFlexLayout {
}
```

贡献

$ swift package generate-xcodeproj

许可

UICollectionViewFlexLayout遵循MIT许可。更多信息请参阅<ンク href="LICENSE">"LICENSE"文件。