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!!

在头文件中定义UICollectionViewDelegateFlowLayout协议。

实现UICollectionViewDelegateFlowLayout协议的如下方法:

- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
{
    return UIEdgeInsetsMake(5, 5, 5, 5);
}

点击这里查看苹果文档的UIEdgeInsetMake方法。

支持第一个问题。我试图在UICollectionView上获得5px的间距，但这并不奏效，以及UIEdgeInsetsMake(0,0,0,0)…

在UITableView中，我可以通过直接指定一行中的x,y坐标来做到这一点。

这是我的UICollectionView代码:

#pragma mark collection view cell layout / size
- (CGSize)collectionView:(UICollectionView*)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
    return [self getCellSize:indexPath];  // will be w120xh100 or w190x100
    // if the width is higher, only one image will be shown in a line
}

#pragma mark collection view cell paddings
- (UIEdgeInsets)collectionView:(UICollectionView*)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
    return UIEdgeInsetsMake(0, 0, 0, 0); // top, left, bottom, right
}

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {

    return 5.0;
}

更新:用下面的代码解决了我的问题。

ViewController。m

#import "ViewController.h"
#import "MagazineCell.h" // created just the default class. 

static NSString * const cellID = @"cellID";

@interface ViewController ()

@end

@implementation ViewController

#pragma mark - Collection view
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return 1;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return 30;
}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    MagazineCell *mCell = (MagazineCell *)[collectionView dequeueReusableCellWithReuseIdentifier:cellID forIndexPath:indexPath];

    mCell.backgroundColor = [UIColor lightGrayColor];

    return mCell;
}

#pragma mark Collection view layout things
// Layout: Set cell size
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {

    NSLog(@"SETTING SIZE FOR ITEM AT INDEX %d", indexPath.row);
    CGSize mElementSize = CGSizeMake(104, 104);
    return mElementSize;
}
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {
    return 2.0;
}

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section {
    return 2.0;
}

// Layout: Set Edges
- (UIEdgeInsets)collectionView:
(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
   // return UIEdgeInsetsMake(0,8,0,8);  // top, left, bottom, right
    return UIEdgeInsetsMake(0,0,0,0);  // top, left, bottom, right
}

@end

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。

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!!

使用水平流布局，我也得到了10点之间的单元格间距。为了移除间距，我需要将minimumlinespespaces和minimumInterItemSpacing设置为零。

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

此外，如果所有单元格大小相同，直接在流布局上设置属性比使用委托方法更简单、更有效。