如何删除两个UICollectionView列之间的余量

我有UICollectionView中，我想在单元格之间没有间距。 但是，尽pipe我竭尽全力，似乎无法消除这个空间，

码

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section { return 0; } - (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section { return 0; } - (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section { return UIEdgeInsetsMake(0, 0, 0, 0); } 

额外的信息

• 单元格宽度是234
• UICollectionView宽度是703

Answer 1

从这个 。 您需要更改minimumInteritemSpacing和minimumLineSpacing 。

 UICollectionViewFlowLayout *flow = [[UICollectionViewFlowLayout alloc] init]; flow.itemSize = CGSizeMake(cellWidth, cellHeight); flow.scrollDirection = UICollectionViewScrollDirectionHorizontal; flow.minimumInteritemSpacing = 0; flow.minimumLineSpacing = 0; mainCollectionView.collectionViewLayout = flow; 

Answer 2

下面对我来说是骗人的。

 UICollectionViewFlowLayout *flow = [[UICollectionViewFlowLayout alloc] init]; flow.itemSize = CGSizeMake(360*iPhoneFactorX, 438*iPhoneFactorX); flow.scrollDirection = UICollectionViewScrollDirectionHorizontal; flow.minimumInteritemSpacing = 0; flow.minimumLineSpacing = 0; [mainCollectionView reloadData]; mainCollectionView.collectionViewLayout = flow; 

最后一行在我们分配布局的地方非常重要

Answer 3

你不能用默认的UICollectionViewFlowLayout来做到这一点。 尽pipe您可以使用其他布局，例如它的一个子类。 我正在使用这个类来明确设置间距：

 @implementation FlowLayoutExt @synthesize maxCellSpacing; - (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect { NSArray* attributesToReturn = [super layoutAttributesForElementsInRect:rect]; for (UICollectionViewLayoutAttributes* attributes in attributesToReturn) { if (nil == attributes.representedElementKind) { NSIndexPath* indexPath = attributes.indexPath; attributes.frame = [self layoutAttributesForItemAtIndexPath:indexPath].frame; } } return attributesToReturn; } - (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)indexPath { UICollectionViewLayoutAttributes* currentItemAttributes = [super layoutAttributesForItemAtIndexPath:indexPath]; UIEdgeInsets sectionInset = [(UICollectionViewFlowLayout *)self.collectionView.collectionViewLayout sectionInset]; if (indexPath.item == 0) { // first item of section // CGRect frame = currentItemAttributes.frame; // frame.origin.x = sectionInset.left; // first item of the section should always be left aligned // currentItemAttributes.frame = frame; return currentItemAttributes; } NSIndexPath* previousIndexPath = [NSIndexPath indexPathForItem:indexPath.item-1 inSection:indexPath.section]; CGRect previousFrame = [self layoutAttributesForItemAtIndexPath:previousIndexPath].frame; CGFloat previousFrameRightPoint = previousFrame.origin.x + previousFrame.size.width + maxCellSpacing; CGRect currentFrame = currentItemAttributes.frame; CGRect strecthedCurrentFrame = CGRectMake(0, currentFrame.origin.y, self.collectionView.frame.size.width, currentFrame.size.height); if (!CGRectIntersectsRect(previousFrame, strecthedCurrentFrame)) { // if current item is the first item on the line // the approach here is to take the current frame, left align it to the edge of the view // then stretch it the width of the collection view, if it intersects with the previous frame then that means it // is on the same line, otherwise it is on it's own new line CGRect frame = currentItemAttributes.frame; frame.origin.x = sectionInset.left; // first item on the line should always be left aligned currentItemAttributes.frame = frame; return currentItemAttributes; } CGRect frame = currentItemAttributes.frame; frame.origin.x = previousFrameRightPoint; currentItemAttributes.frame = frame; return currentItemAttributes; } 

Answer 4

我通过在尺寸检查员中取消选中“ 相对于边距 ” 来解决类似的问题。

更改storyBoard中的间距或以编程方式。

要么

  func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat { return 0 } 

Answer 5

尝试将UICollectionView的属性设置为0（零） ： Min Spacing For Cells and For Lines

Answer 6

其实，你将无法使用UICollectionViewFlowLayout设置一个参数来实现你的目标，因为它使用单元格间距来正确alignment屏幕上的所有项目，这就是为什么他们将单元格间距设置为最小。 如果您的单元格大小是固定的，您可以使用ViewCollection Size以便所有单元格和边距完全适合它。