reloadData() 不适用于 refreshControl

Question

我有管理很多单元格的 UICollectionView。当我删除一个单元格时，我希望该单元格随 refreshControl 一起消失。但我不明白为什么 reloadData 不起作用。如果有人能帮助我提前谢谢你。

在我看来 didLoad :

self.collectionView!.alwaysBounceVertical = true
let refresher = UIRefreshControl()
refresher.tintColor = MyColor.Color
refresher.addTarget(self, action: #selector(PublicListController.refreshStream), forControlEvents: .ValueChanged)
refreshControl = refresher
collectionView!.addSubview(refreshControl!)

collectionView.dataSource = self
self.populateDataBest()

我的简单功能：

func refreshStream() {
    collectionView?.reloadData()
    refreshControl?.endRefreshing()
}

我使用方法 populateDataBest 完成了我的 CollectionView :

 func populateDataBest() {
    self.videosService.get(true, completionHandler: {
        videosBest, error in
        dispatch_async(dispatch_get_main_queue(), {
            if error != nil {
                if error!.code == -999 {
                    return
                }
                self.displayError(informations.LocalizedConnectionError)
                return
            }
                self.bestClip = videosBest
                for (indexBest, _) in (self.bestClip?.enumerate())! {
                    let videoBest:Clip = self.bestClip![indexBest]
                    self.pictureArrayVideo.addObject(["clip": videoBest, "group": "BEST"])
                }
                 self.dataSource.updateData(self.pictureArrayVideo)
                 self.collectionView.reloadData()
        })
    })
}

第一次重新加载在我的方法 populateDataBest 结束时工作..

编辑：

我尝试实现删除我的元素的函数（我在 remove 方法的参数中放入 0 只是为了我的测试）

func refreshStream() {
      dispatch_async(dispatch_get_main_queue(), {
        self.remove(0)
        self.collectionView.reloadData()
    })
     self.refreshControl.endRefreshing()
}

func remove(i: Int) {
    self.listForPager.removeAtIndex(i)
    let indexPath: NSIndexPath = NSIndexPath(forRow: i, inSection: 0)
    self.collectionView.performBatchUpdates({
        self.collectionView.deleteItemsAtIndexPaths(NSArray(object: indexPath) as! [NSIndexPath])
        }, completion: {
            (finished: Bool) in
            self.collectionView.reloadItemsAtIndexPaths(self.collectionView.indexPathsForVisibleItems())
    })
}

我在

之后出现了这个错误

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of items in section 0.  The number of items contained in an existing section after the update (8) must be equal to the number of items contained in that section before the update (8), plus or minus the number of items inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of items moved into or out of that section (0 moved in, 0 moved out).'

有人知道为什么并且可以帮助我吗？

提前致谢。

Answer 1

如果您从阵列中骑 collection 您还应该删除该项目，因为该行将消失并最终重新加载。

reloadData() 不适用于 refreshControl

reloadData() doesn't work with refreshControl

ios

swift

uicollectionview

reloaddata

uirefreshcontrol