如何刪除兩個UICollectionView列之間的邊距

Question

我有UICollectionView，我想在其中的單元格之間沒有間距。 但是，盡管我全力以赴，但我似乎無法移開空間，

碼

- (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);
}

額外信息

• 像元寬度是234
• UICollectionView的寬度是703

Answer 1

從這個 。 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

下面幫了我大忙。

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;

最后一行對於我們分配布局非常重要

Answer 3

您不能使用默認的UICollectionViewFlowLayout來做到這一點。 盡管您可以使用其他布局，例如其子類。 我正在使用此類明確設置間距：

@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

我通過在大小檢查器中取消選中“ 相對於邊距 ” 來解決類似的問題。

在StoryBoard中或以編程方式更改間距。

要么

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

Answer 5

嘗試將0（零）設置為UICollectionView的屬性： 單元格和行的最小間距

Answer 6

實際上，您將無法使用UICollectionViewFlowLayout設置參數來實現您的目標，因為它會與單元格間距配合使用以正確對齊屏幕中的所有項目，這就是為什么它們將單元格間距設置為最小值的原因。 如果單元格大小固定，則可以使用ViewCollection Size以便所有單元格和邊距完全適合其中。