Ios UICollectionView更改单元格顶部和底部距离

我对IOS开发相当陌生。我正在使用本教程中的代码。您可以从中获得代码。这里我想更改集合视图单元格中的图像顶部和底部距离。我怎么能做到？ 以下是集合视图单元格的代码：

-(void)setupCollectionView {
    [self.collectionView registerClass:[CMFGalleryCell class] forCellWithReuseIdentifier:@"cellIdentifier"];

    UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
    [flowLayout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
    [flowLayout setMinimumInteritemSpacing:0.0f];
    [flowLayout setMinimumLineSpacing:0.0f];
    [self.collectionView setPagingEnabled:YES];
    [self.collectionView setCollectionViewLayout:flowLayout];
}


-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    return 1;
}

-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    return [self.dataArray count];
}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {

    CMFGalleryCell *cell = (CMFGalleryCell *)[collectionView dequeueReusableCellWithReuseIdentifier:@"cellIdentifier" forIndexPath:indexPath];

    NSString *imageName = [self.dataArray objectAtIndex:indexPath.row];
    [cell setImageName:imageName];
    [cell updateCell];

    return cell;

}

-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
    return self.collectionView.frame.size;
}


#pragma mark -
#pragma mark Data methods
-(void)loadImages {

    NSString *sourcePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"Assets"];
    self.dataArray = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:sourcePath error:NULL];

}

CMFGallary.cell的代码为：

#import "CMFGalleryCell.h"

@interface CMFGalleryCell()
@property (strong, nonatomic) IBOutlet UIImageView *imageView;
@end

@implementation CMFGalleryCell

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        NSArray *arrayOfViews = [[NSBundle mainBundle] loadNibNamed:@"CMFGalleryCell" owner:self options:nil];

        if ([arrayOfViews count] < 1) {
            return nil;
        }

        if (![[arrayOfViews objectAtIndex:0] isKindOfClass:[UICollectionViewCell class]]) {
            return nil;
        }

        self = [arrayOfViews objectAtIndex:0];
    }

    return self;
}

-(void)updateCell {

    NSString *sourcePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"Assets"];
    NSString *filename = [NSString stringWithFormat:@"%@/%@", sourcePath, self.imageName];

    UIImage *image = [UIImage imageWithContentsOfFile:filename];

    [self.imageView setImage:image];

    [self.imageView setContentMode:UIViewContentModeScaleAspectFit];

}

@end

#导入“CMFGalleryCell.h”
@接口CMFGalleryCell（）
@属性（强，非原子）IBUIImageView*imageView；
@结束
@CMFGalleryCell的实现
-（id）initWithFrame:（CGRect）帧
{
self=[super initWithFrame:frame]；
如果（自我）{
//初始化代码
NSArray*ArrayOfView=[[NSBundle mainBundle]loadNibNamed:@“CMFGalleryCell”所有者：自选项：nil]；
如果（[arrayOfViews计数]<1）{
返回零；
}
如果（！[[arrayOfViews objectAtIndex:0]是类的种类：[UICollectionViewCell类]]）{
返回零；
}
self=[ArrayOfView对象索引：0]；
}
回归自我；
}
-（void）updateCell{
NSString*sourcePath=[[NSBundle mainBundle]resourcePath]stringByAppendingPathComponent:@“资产”]；
NSString*文件名=[NSString stringWithFormat:@“%@/%@”，源路径，self.imageName]；
UIImage*image=[UIImage imageWithContentsOfFile:filename]；
[self.imageView setImage:image]；
[self.imageView setContentMode:UIViewContentModeScaleAspectFit]；
}
@结束

为添加插图更新集合视图流布局，如：

UICollectionViewFlowLayout *flow = yourCollectionView.collectionViewLayout;
flow.sectionInset = UIEdgeInsetsMake(topMargin, leftMargin, bottom, right);

或实施

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

---

请在问题中直接填写相关代码。如果链接页面发生更改，链接可能会变得无效。是否可以复制/粘贴CMFGalleryCell.m中的代码？您可以在上面看到它…不，它不会更改具有集合视图图像的单元格…请帮助