IOS 7.1 UICollectionView无法识别用于拖动的完整单击区域

我有一个UICollectionView

在水平行中显示项目的自定义布局

包含多个子视图的自定义UICollectionViewCell-图像 还有一些标签

UICollectionView的多个实例在UITableView中垂直显示

在iOS 8.1上，所有功能都运行良好。在iOS 7.1上测试，但我不能拖动集合，除非我的手指位于行的上三分之一（由图片中的黄色矩形指示）

请注意，UITableView可以正确地垂直滚动

有什么建议吗

提前感谢，并为C#表示歉意

// The Layout
public sealed class SingleRowLayout : UICollectionViewFlowLayout
    {
        public SingleRowLayout()
        {
            this.ItemSize = new CGSize(50, 120); // 120 is the full cell height
            this.ScrollDirection = UICollectionViewScrollDirection.Horizontal;
        }
    }


// The UICollectionViewCell

public sealed class StickerViewCell : UICollectionViewCell
{

    [Export ("initWithFrame:")]
    public StickerViewCell (CGRect frame) : base (frame)
    {
        var top = 0f;
        this.imageView = new UIImageView();
        this.imageView.ContentMode = UIViewContentMode.ScaleAspectFit;
        this.imageView.Frame = new CGRect(
            new CGPoint(GridDimensions.ImageInternalSidePadding, top),
            new CGSize(GridDimensions.StickerWidth - (GridDimensions.ImageInternalSidePadding * 2), GridDimensions.StickerHeight)
        );

        top = (float)this.imageView.Frame.Height
        this.sequenceTextView = this.createTextView(ref top);
        this.dateTextView = this.createTextView(ref top);
        this.sensationTextView = this.createTextView(ref top);

        ContentView.AddSubview(this.imageView);
        ContentView.AddSubview(this.sequenceTextView);
        ContentView.AddSubview(this.sensationTextView);
        ContentView.AddSubview(this.dateTextView);

    }

    private UILabel createTextView(ref float top)
    {
        var result = new UILabel();
        result.AdjustsFontSizeToFitWidth = true;

        result.Frame = new CGRect(
            new CGPoint(2, top),
            new CGSize(GridDimensions.StickerWidth - (2 * 2), GridDimensions.TextHeight)
        );
        top += GridDimensions.TextHeight + GridDimensions.TextFieldSpacing;
        return result;
    }

}