如何在单个集合View中实现不同的集合视图单元格类型？

Question

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let dev = devices[indexPath.item]
    if dev.cuid == "3011"{

        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "LightViewCell", for: indexPath) as! LightViewCell
        let visibility = self.getStatusFor(nodeID: dev.node_id!, endpoint: dev.end_point!, devicename: dev.device_name!)
        if visibility.contains("0"){
            cell.LigntIMG.image = #imageLiteral(resourceName: "bulb-off")
            cell.LightName.text = dev.device_name
            cell.status = 0
            cell.index = indexPath
            cell.controlCMDs = getControlCMDS(nodeID: dev.node_id!, endpoint: dev.end_point!)
            cells.append(cell)
        }else{
            cell.LigntIMG.image = UIImage(named: dev.menu_id!)
            cell.LightName.text = dev.device_name
            cell.status = 1
            cell.index = indexPath
            cell.controlCMDs = getControlCMDS(nodeID: dev.node_id!, endpoint: dev.end_point!)
            cells.append(cell)
        }
          return cell
    }


        else if dev.cuid == "3006"{
          let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "DimmerLightViewCell", for: indexPath) as! DimmerLightViewCell
          return cell
        }

    return //
    }

我有两种类型的自定义单元格（LightViewCell / DimmerLightViewCell）基于我需要显示两个单元格中的任何一个的条件...... 类型

这里我没有返回任何值，忽略该错误.....我需要知道如何实现上述要求..

谢谢：）

Answer 1

该方法必须返回单元格。您可以尝试以下代码：

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    let dev = devices[indexPath.item]
    if dev.cuid == "3011"{

        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "LightViewCell", for: indexPath) as! LightViewCell
        let visibility = self.getStatusFor(nodeID: dev.node_id!, endpoint: dev.end_point!, devicename: dev.device_name!)
        if visibility.contains("0"){
            cell.LigntIMG.image = #imageLiteral(resourceName: "bulb-off")
            cell.LightName.text = dev.device_name
            cell.status = 0
            cell.index = indexPath
            cell.controlCMDs = getControlCMDS(nodeID: dev.node_id!, endpoint: dev.end_point!)
            cells.append(cell)
        }else{
            cell.LigntIMG.image = UIImage(named: dev.menu_id!)
            cell.LightName.text = dev.device_name
            cell.status = 1
            cell.index = indexPath
            cell.controlCMDs = getControlCMDS(nodeID: dev.node_id!, endpoint: dev.end_point!)
            cells.append(cell)
        }
          return cell
    } else {
          let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "LightViewCell", for: indexPath) as! DimmerLightViewCell
          return cell
        }

    return //
    }

Answer 2

您只需使用cellForRowAtIndexPath

中的条件即可

例如

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    if(indexPath.item > 0){
         let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "LightViewCell", for: indexPath) as! LightViewCell
         /*do setup here*/

         return cell
   }else{
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "DimmerLightViewCell", for: indexPath) as! DimmerLightViewCell
        /*do setup here*/

        return cell
   }    
 }

Answer 3

我并不完全明白你面临的问题是什么。

但是，您可以根据代码中的给定条件尝试使用以下代码返回单元格：

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
    let dev = devices[indexPath.item]
    if dev.cuid == "3011"
    {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "LightViewCell", for: indexPath) as! LightViewCell

        let visibility = self.getStatusFor(nodeID: dev.node_id!, endpoint: dev.end_point!, devicename: dev.device_name!)
        cell.status = visibility.contains("0") ? 0 : 1
        cell.LigntIMG.image = visibility.contains("0") ? #imageLiteral(resourceName: "bulb-off") : UIImage(named: dev.menu_id!)
        cell.LightName.text = dev.device_name
        cell.index = indexPath
        cell.controlCMDs = getControlCMDS(nodeID: dev.node_id!, endpoint: dev.end_point!)
        cells.append(cell)
        return cell
    }
    else if dev.cuid == "3006"
    {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "DimmerLightViewCell", for: indexPath) as! DimmerLightViewCell
        return cell
    }
    return UICollectionViewCell()
}