Question

class MDCollectionViewLayoutAttributes : UICollectionViewLayoutAttributes
{
    var color: UIColor = UIColor.whiteColor()
    var image : UIImageView!

    override func copyWithZone(zone: NSZone) -> AnyObject
    {
        let newAttributes: MDCollectionViewLayoutAttributes = super.copyWithZone(zone) as! MDCollectionViewLayoutAttributes
        newAttributes.color = self.color.copyWithZone(zone) as! UIColor
        newAttributes.image = UIImageView(frame:newAttributes.bounds)
        newAttributes.image.image = UIImage(named:"Appetizer.png")

        newAttributes.image = self.image.copyWithZone(zone) as! UIImageView// this is giving me an error
        return newAttributes
    }
}

我需要在下面的代码中声明一个图像以将其设置为剖面背景，但它给了我一个错误。

override func layoutAttributesForElementsInRect(rect: CGRect) -> [UICollectionViewLayoutAttributes]?
{
    let attributes = super.layoutAttributesForElementsInRect(rect)
    var allAttributes = [UICollectionViewLayoutAttributes]()

    if let attributes = attributes
    {

        for attr in attributes
        {
            if (attr.representedElementCategory == UICollectionElementCategory.Cell && attr.frame.origin.x == self.sectionInset.left)
            {
                                   let decorationAttributes = SBCollectionViewLayoutAttributes(forDecorationViewOfKind: "sectionBackground", withIndexPath: attr.indexPath)

              //  decorationAttributes.color = UIColor.brownColor().colorWithAlphaComponent(1)

任何帮助？

Answer 1

UIImageView不符合NSCopying协议，这就是copyWithZone无法正常工作的原因。您可以为实现NSCopying一致性的UIImageView或其子类创建扩展。

错误：静态成员copyWithZone不能用于UIImageView类型的实例

1 个答案: