我发现了使用IB配置单元格或行之间的间距的非常简单的方法。

只需从storyboard/Xib文件中选择UICollectionView，然后按下图所示单击大小检查器。

要以编程方式配置空间，请使用以下属性。

1)用于设置行间距。

[self.collectionView setMinimumLineSpacing:5];

2)用于设置项目/单元格之间的间距。

[self.collectionView setMinimumInteritemSpacing:5];

我有问题与接受的答案，所以我更新了它，这是为我工作:

.h

@interface MaxSpacingCollectionViewFlowLayout : UICollectionViewFlowLayout
@property (nonatomic,assign) CGFloat maxCellSpacing;
@end

.m

@implementation MaxSpacingCollectionViewFlowLayout

- (NSArray *) layoutAttributesForElementsInRect:(CGRect)rect {
    NSArray *attributes = [super layoutAttributesForElementsInRect:rect];

    if (attributes.count <= 0) return attributes;

    CGFloat firstCellOriginX = ((UICollectionViewLayoutAttributes *)attributes[0]).frame.origin.x;

    for(int i = 1; i < attributes.count; i++) {
        UICollectionViewLayoutAttributes *currentLayoutAttributes = attributes[i];
        if (currentLayoutAttributes.frame.origin.x == firstCellOriginX) { // The first cell of a new row
            continue;
        }

        UICollectionViewLayoutAttributes *prevLayoutAttributes = attributes[i - 1];
        CGFloat prevOriginMaxX = CGRectGetMaxX(prevLayoutAttributes.frame);
        if ((currentLayoutAttributes.frame.origin.x - prevOriginMaxX) > self.maxCellSpacing) {
            CGRect frame = currentLayoutAttributes.frame;
            frame.origin.x = prevOriginMaxX + self.maxCellSpacing;
            currentLayoutAttributes.frame = frame;
        }
    }
    return attributes;
}

@end

以前的版本并没有真正工作的部分> 1。所以我的解决方案在这里找到了https://codentrick.com/create-a-tag-flow-layout-with-uicollectionview/。对于懒惰的人:

override func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
    let attributesForElementsInRect = super.layoutAttributesForElements(in: rect)
    var newAttributesForElementsInRect = [UICollectionViewLayoutAttributes]()
    // use a value to keep track of left margin
    var leftMargin: CGFloat = 0.0;
    for attributes in attributesForElementsInRect! {
        let refAttributes = attributes 
        // assign value if next row
        if (refAttributes.frame.origin.x == self.sectionInset.left) {
            leftMargin = self.sectionInset.left
        } else {
            // set x position of attributes to current margin
            var newLeftAlignedFrame = refAttributes.frame
            newLeftAlignedFrame.origin.x = leftMargin
            refAttributes.frame = newLeftAlignedFrame
        }
        // calculate new value for current margin
        leftMargin += refAttributes.frame.size.width + 10
        newAttributesForElementsInRect.append(refAttributes)
    }

    return newAttributesForElementsInRect
}

我知道这个话题很老了，但如果有人还需要正确答案，你需要什么:

Override standard flow layout. Add implementation like that: - (NSArray *) layoutAttributesForElementsInRect:(CGRect)rect { NSArray *answer = [super layoutAttributesForElementsInRect:rect]; for(int i = 1; i < [answer count]; ++i) { UICollectionViewLayoutAttributes *currentLayoutAttributes = answer[i]; UICollectionViewLayoutAttributes *prevLayoutAttributes = answer[i - 1]; NSInteger maximumSpacing = 4; NSInteger origin = CGRectGetMaxX(prevLayoutAttributes.frame); if(origin + maximumSpacing + currentLayoutAttributes.frame.size.width < self.collectionViewContentSize.width) { CGRect frame = currentLayoutAttributes.frame; frame.origin.x = origin + maximumSpacing; currentLayoutAttributes.frame = frame; } } return answer; }

其中maximumSpacing可以设置为您喜欢的任何值。这个技巧保证了单元格之间的空间将等于maximumSpacing!!

试试这个方法:

- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView
                    layout:(UICollectionViewLayout*)collectionViewLayout
    insetForSectionAtIndex:(NSInteger)section {

    UIEdgeInsets insets = UIEdgeInsetsMake(?, ?, ?, ?);

    return insets;
}

请注意属性名minimumInterItemSpacing。这将是项目之间的最小间距，而不是精确的间距。如果你设置minimumInterItemSpacing为某个值，你可以确保spacing不会小于该值。但有机会获得更高的价值。

实际上，项目之间的间距取决于几个因素itemSize和sectionInset。集合视图根据这些值动态放置内容。所以你不能保证精确的间距。你应该用sectionInset和minimumInterItemSpacing做一些试错。