Question

我是IOS Development中的新手。我使用本教程中的代码Creating a Paged Photo Gallery With a UICollectionView。您可以从此link获取代码。这里我想更改集合视图单元格中的图像顶部和底部距离。我怎么能这样做？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的代码是：

#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

Answer 1

更新集合视图流布局以添加以下内容：

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);
}

UICollectionView改变单元格的顶部和底部距离

1 个答案: