swift中的UICollectionview页脚

Question

我想使用此代码将页脚添加到UICollectionView。我在 UICollectionView 布局中使用自定义布局

添加了委托和数据源方法：-

UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout

viewdDidLoad() 函数中的代码：-

 UINib(nibName: "ProfileFooter", bundle:nil)
 collectionView!.registerNib(nibName1, forSupplementaryViewOfKind: UICollectionElementKindSectionFooter, withReuseIdentifier: "ProfileFooter")
        collectionView.registerClass(ProfileFooter.classForCoder(), forSupplementaryViewOfKind: "ProfileFooter", withReuseIdentifier: "ProfileFooter")

 func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {

        var reusable = UICollectionReusableView()

            if kind == UICollectionElementKindSectionFooter{
                let ProfileFooter = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionFooter, withReuseIdentifier: "ProfileFooter", forIndexPath: indexPath)
                ProfileFooter.backgroundColor = UIColor.redColor()
                reusable = ProfileFooter
            }

        return reusable
    }

任何人都可以检查其中有什么问题吗？？

Answer 1

您在出列时忘记投射页脚视图。 试试这个。

override func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {
switch kind
 {
  case UICollectionElementKindSectionFooter:
      let profileFooter = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionFooter, withReuseIdentifier: "ProfileFooter", forIndexPath: indexPath) as! ProfileFooter
      profileFooter.backgroundColor = UIColor.redColor()
      return profileFooter
  case default:
      assert(false, "Unexpected element kind")
 }
}