小编Rav*_*avi的帖子

这是参考链接：

https://www.raywenderlich.com/107439/uicollectionview-custom-layout-tutorial-pinterest

我已UICollectionView在最后一个单元中实现了更多加载，数据正在下载，下载完成后我想重新加载集合

collectionView.collectionViewLayout.invalidateLayout()
self.collectionView.reloadData()

let concurrentQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
dispatch_async(concurrentQueue) {
            DataManager.sharedInstance.homeRequest(Dictionary: params, onSuccess: { (dict) in
                self.downloadPageIndex +=  1
                let response = HomeObject(dictionary: dict)

                for (_,e) in (response.dataDict?.enumerate())!{
                    self.dataArray.append(e)
                }

                dispatch_async(dispatch_get_main_queue()) {

                    self.collectionView.reloadData()
                    self.collectionView.collectionViewLayout.invalidateLayout()

                }
                self.activityIndicatorCell.stopAnimating()

                }, onError: { (error) in
                    self.activityIndicatorCell.stopAnimating()

            })

像这个collectionview reloadata

谁能帮我吗？