UICollectionView右侧高度单元格重叠

Question

我是新建的UICollectionView，我有一个问题。我想显示宽度为300px的图像，并计算出正确的高度比例。为此，我做了：

- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath {
UICollectionViewCell *cell = [cv dequeueReusableCellWithReuseIdentifier:@"MyCell" forIndexPath:indexPath];

UIImage *image = [photos objectAtIndex:indexPath.row];
if(image){

    UIImageView *imageView = [[UIImageView alloc]initWithImage:image];

    float scale = (image.size.height/image.size.width)*300;

    [imageView setFrame:CGRectMake(imageView.frame.origin.x, imageView.frame.origin.y, 300, scale )];

    [cell addSubview:imageView];
    cell.backgroundColor = [UIColor clearColor];
}else{

    cell.backgroundColor = [UIColor redColor];
}


return cell;
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
    UIImage *image = [photos objectAtIndex:indexPath.row];
    float scale = (image.size.height/image.size.width)*300;
    return  CGSizeMake(300, scale);
}

这似乎在开始时起作用，但是当我向下滚动时，图像开始彼此重叠。这有什么办法可以避免这种情况吗？

Answer 1

您必须在UICollectionView中调整单元格大小，使用UICollectionViewFlowLayout

查看Ray Wenderlich教程：http://www.raywenderlich.com/22324/beginning-uicollectionview-in-ios-6-part-12