Collectionview cellForItemAtIndexPath重新加载后不调用

Question

我有2个字典和字典包含传递numberOfItemsInSection

的数组

1。 self.dicMyClaimsSender

2。 self.dicMyClaimsReceiver

我正在使用分段控制。当我点击片段，然后我重新加载collectionView（我正在使用3集合视图）。

// UISegmentedControl method
@IBAction func segmntAction(sender:UISegmentedControl) {

        switch segmnetCtrl.selectedSegmentIndex {

        case 0:

            self.isSenderSelected = true
            self.heightCollection.constant  = 130.0
            self.heightViewImg.constant     = 0.0
            self.heightViewVideo.constant   = 0.0
            self.heightViewFile.constant    = 0.0
            self.heightBtnAttach.constant   = 42.0
            self.heightBtnSendFile.constant = 42.0
            self.collectionImg.reloadData()
            self.collectionFile.reloadData()
            self.collectionVideo.reloadData()

            break

        case 1:

            self.isSenderSelected = false
            self.heightViewImg.constant     = 156.0
            self.heightViewVideo.constant   = 156.0
            self.heightViewFile.constant    = 156.0
            self.heightCollection.constant  = 0.0
            self.heightBtnAttach.constant   = 0.0
            self.heightBtnSendFile.constant = 0.0

            self.collectionImg.reloadData()
            self.collectionFile.reloadData()
            self.collectionVideo.reloadData()
            break
        default:
            break;
        }
    }

// MARK: - UICollectionView Delegates & Datasources

    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        if self.isSenderSelected {
            if collectionView.tag == 1 {
                return self.assets?.count ?? 0
            } else if collectionView.tag == 2 {
                if self.dicMyClaimsSender.ary_Images.count == 0 {
                    self.heightViewImg.constant = 0.0
                } else {
                    self.heightViewImg.constant = 156.0
                }
                return self.dicMyClaimsSender.ary_Images.count
            } else if collectionView.tag == 3 {
                if self.dicMyClaimsSender.ary_Video.count == 0 {
                    self.heightViewVideo.constant = 0.0
                } else {
                    self.heightViewVideo.constant = 156.0
                }
                return self.dicMyClaimsSender.ary_Video.count
            } else {
                if self.dicMyClaimsSender.ary_Document.count == 0 {
                    self.heightViewFile.constant = 0.0
                } else {
                    self.heightViewFile.constant = 156.0
                }
                return self.dicMyClaimsSender.ary_Document.count
            }
        } else {
            if collectionView.tag == 2 {
                if self.dicMyClaimsReceiver.ary_Images.count == 0 {
                    self.heightViewImg.constant = 0.0
                } else {
                    self.heightViewImg.constant = 156.0
                }
                return self.dicMyClaimsReceiver.ary_Images.count
            } else if collectionView.tag == 3 {
                if self.dicMyClaimsReceiver.ary_Video.count == 0 {
                    self.heightViewVideo.constant = 0.0
                } else {
                    self.heightViewVideo.constant = 156.0
                }
                return self.dicMyClaimsReceiver.ary_Video.count
            } else {
                if self.dicMyClaimsReceiver.ary_Document.count == 0 {
                    self.heightViewFile.constant = 0.0
                } else {
                    self.heightViewFile.constant = 156.0
                }
                return self.dicMyClaimsReceiver.ary_Document.count
            }
        }
    }