UICollectionView 内容无法识别（搜索时）

Posted 2023-03-14

【中文标题】UICollectionView 内容无法识别（搜索时）

【英文标题】：UICollectionView content not recognized (when searching)

【发布时间】：2017-03-22 08:52:59

【问题描述】：

我是 Swift 新手，我的 CollectionView 有问题。我在 CollectionView 中有 2 个自定义单元格。第一个单元格，比如cell 和第二个cellOcc，其中cell 是空表，cellOcc 是占用表。应用程序启动时它工作正常，但是当我尝试搜索它们时它变得很奇怪（内容不在它们的位置正确）。以下是我的代码，任何建议和帮助都会对我有所帮助。提前致谢。

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) 
    filteredSearchDataTable = filterArray(filteredDataTable, keywords: "tischnr", searchStr: searchText)
    tableCollectionView.reloadData()


..........

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int 
    var count:Int = 0

    if(searchBarIsActive) 
        count = filteredSearchDataTable.count
    
    else
        count = filteredDataTable.count
    

    return count

//        return max(filteredDataTable.count, 2)


func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell 
    var cell: TableCollectionViewCell = tableCollectionView.dequeueReusableCell(withReuseIdentifier: "emptyTable", for: indexPath) as! TableCollectionViewCell
    cell.layer.borderWidth = 1
    cell.layer.cornerRadius = 5

    if (searchBarIsActive) 
        currTable = (filteredSearchDataTable[indexPath.row] as! [AnyHashable: Any])
        cell.labelTableNr.text = (String(currTable["tischnr"] as! Int))
    
    else 
        currTable = (filteredDataTable[indexPath.row] as! [AnyHashable: Any])
        cell.labelTableNr.text = (String(currTable["tischnr"] as! Int))
        currRechnr = getJSONArrayIndex(filteredDataBill, name: "tischnr", o: ((currTable["tischnr"] as! Int)))

        if self.selectedIndex.index(of: indexPath as NSIndexPath) == nil 
            //
         else 
            //
        
    

    var rechnrValue = 0

    if currRechnr >= 0 
        rechnrValue = ((filteredDataBill[currRechnr] as! [AnyHashable: Any])["rechnr"] as! Int)
        if (rechnrValue != 0) 
            let cellOcc : TableOccupiedCollectionViewCell = tableCollectionView.dequeueReusableCell(withReuseIdentifier: "occupiedTable", for: indexPath) as! TableOccupiedCollectionViewCell

            cellOcc.layer.borderWidth = 1
            cellOcc.layer.cornerRadius = 5

            cellOcc.tableNrOccLabel.text = ((filteredDataTable[indexPath.row] as! [AnyHashable: Any]) ["bezeich"] as! String)
            cellOcc.paxOccLabel.text = (String((filteredDataBill[currRechnr] as! [AnyHashable: Any]) ["belegung"] as! Int))

            cellOcc.guestNameLabel.text = ((filteredDataBill[currRechnr] as! [AnyHashable: Any]) ["bilname"] as! String)
            cellOcc.amountLabel.text = (String((filteredDataBill[currRechnr] as! [AnyHashable: Any]) ["saldo"] as! Int))

            return cellOcc
            
        else 
            return cell
        
    

    return cell

【参考方案1】：

我解决了我的问题。在我所有的 func CollectionView 中，它总是有两种情况（searchBarActive 和正常）。我把这两种情况的逻辑都放在了一起。所以在我的最终代码下面

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell 
    let cell: TableCollectionViewCell = tableCollectionView.dequeueReusableCell(withReuseIdentifier: "emptyTable", for: indexPath) as! TableCollectionViewCell
    cell.layer.borderWidth = 1
    cell.layer.cornerRadius = 5

    if (searchBarIsActive) 
        currTable = (filteredSearchDataTable[indexPath.row] as! [AnyHashable: Any])
        cell.labelTableNr.text = (String(currTable["tischnr"] as! Int))

        currRechnr = getJSONArrayIndex(filteredDataBill, name: "tischnr", o: ((currTable["tischnr"] as! Int)))
        var rechnrValue = 0

        if currRechnr >= 0 
            rechnrValue = ((filteredDataBill[currRechnr] as! [AnyHashable: Any])["rechnr"] as! Int)
            if (rechnrValue != 0) 
                let cellOcc : TableOccupiedCollectionViewCell = tableCollectionView.dequeueReusableCell(withReuseIdentifier: "occupiedTable", for: indexPath) as! TableOccupiedCollectionViewCell

                cellOcc.layer.borderWidth = 1
                cellOcc.layer.cornerRadius = 5

                cellOcc.tableNrOccLabel.text = ((filteredSearchDataTable[indexPath.row] as! [AnyHashable: Any]) ["bezeich"] as! String)
                cellOcc.paxOccLabel.text = (String((filteredDataBill[currRechnr] as! [AnyHashable: Any]) ["belegung"] as! Int))

                cellOcc.guestNameLabel.text = ((filteredDataBill[currRechnr] as! [AnyHashable: Any]) ["bilname"] as! String)
                cellOcc.amountLabel.text = (String((filteredDataBill[currRechnr] as! [AnyHashable: Any]) ["saldo"] as! Int))

                return cellOcc
            
            else 
                return cell
            
        

    
    else 
        currTable = (filteredDataTable[indexPath.row] as! [AnyHashable: Any])
        cell.labelTableNr.text = (String(currTable["tischnr"] as! Int))

        currRechnr = getJSONArrayIndex(filteredDataBill, name: "tischnr", o: ((currTable["tischnr"] as! Int)))
        var rechnrValue = 0

        if currRechnr >= 0 
            rechnrValue = ((filteredDataBill[currRechnr] as! [AnyHashable: Any])["rechnr"] as! Int)
            if (rechnrValue != 0) 
                let cellOcc : TableOccupiedCollectionViewCell = tableCollectionView.dequeueReusableCell(withReuseIdentifier: "occupiedTable", for: indexPath) as! TableOccupiedCollectionViewCell

                cellOcc.layer.borderWidth = 1
                cellOcc.layer.cornerRadius = 5

                cellOcc.tableNrOccLabel.text = ((filteredDataTable[indexPath.row] as! [AnyHashable: Any]) ["bezeich"] as! String)
                cellOcc.paxOccLabel.text = (String((filteredDataBill[currRechnr] as! [AnyHashable: Any]) ["belegung"] as! Int))

                cellOcc.guestNameLabel.text = ((filteredDataBill[currRechnr] as! [AnyHashable: Any]) ["bilname"] as! String)
                cellOcc.amountLabel.text = (String((filteredDataBill[currRechnr] as! [AnyHashable: Any]) ["saldo"] as! Int))

                return cellOcc
            
            else 
                return cell