ios - 将选定行的行高设置为 0 (swift)

Question

在我的应用程序中，我在 UITableView 上显示了“组”物种。

有些群组是免费的，有些是应用内购买的。

作为应用内购买的组在 cellForRowAtIndexPath 中设置了该行上挂锁的 UIImage。

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
    {
        let cell: UITableViewCell       = tableView.dequeueReusableCell(withIdentifier: Resource.SpeciesCell)!

        let specieImage: UIImageView    = cell.viewWithTag(Resource.SpeciesImageTag) as! UIImageView
        let specieName: UILabel         = cell.viewWithTag(Resource.SpeciesNameTag) as! UILabel
        let specieGenus: UILabel        = cell.viewWithTag(Resource.SpeciesGenusTag) as! UILabel
        let specieFamily: UILabel       = cell.viewWithTag(Resource.SpeciesFamilyTag) as! UILabel

        specieName.text     = self.species[(indexPath as NSIndexPath).row].specie
        specieFamily.text   = ""
        specieGenus.text    =  AppDelegate.getRLDatabase().getSubGroupName_BySpecieName(specieName.text!)


        let padLock: UIImageView        = cell.viewWithTag(Resource.SpeciesCategoryLabelTag) as! UIImageView

        padLock.image = UIImage(named: "PadlockIcon")
        padLock.alpha = 0.7

        let fishesPurchased = UserDefaults.standard.bool (forKey: "ReefLife5Fishes")
        let sharksPurchased = UserDefaults.standard.bool (forKey: "ReefLife6Sharks")
        let turtlesPurchased = UserDefaults.standard.bool (forKey: "ReefLife8Turtles")
        let seahorsesPurchased = UserDefaults.standard.bool (forKey: "ReefLife9Seahorses")
        let vertebratesPurchased = UserDefaults.standard.bool (forKey: "ReefLife3Vertebrates")
        let fullPurchased = UserDefaults.standard.bool (forKey: "ReefLife1Full")

        padLock.isHidden = false
        specieImage.alpha = 1.0

        let speciesGroup = self.species[(indexPath as NSIndexPath).row].group

        if fullPurchased == true {

            padLock.isHidden = true
            specieImage.alpha = 1.0

        } else if speciesGroupVertebratesArray.contains(speciesGroup) {

            if vertebratesPurchased == true {

                padLock.isHidden = true
                specieImage.alpha = 1.0

            } else {

                if speciesGroup == "Fish" {
                    if fishesPurchased == true{
                        padLock.isHidden = true
                        specieImage.alpha = 1.0

                    } else{
                        specieImage.alpha = 0.5
                    }
                } else if (speciesGroup == "Sharks" || speciesGroup == "Rays" ) {
                    if sharksPurchased == true{
                        padLock.isHidden = true
                        specieImage.alpha = 1.0

                    } else{
                        specieImage.alpha = 0.5
                    }
                } else if speciesGroup == "Syngnathiformes" {
                    if seahorsesPurchased == true{
                        padLock.isHidden = true
                        specieImage.alpha = 1.0

                    } else{
                        specieImage.alpha = 0.5
                    }
                } else if speciesGroup == "Reptilia" {
                    if turtlesPurchased == true{
                        padLock.isHidden = true
                        specieImage.alpha = 1.0

                    } else{
                        specieImage.alpha = 0.5
                    }
                }
            }

        }
 .... 

我有一个基于 UISwitch 的选项设置来“隐藏锁定的项目”

当用户选择这个时，我想隐藏锁定的组(或未购买的元素)。我认为实现此目的的最佳方法是通过将行高设置为 0 来隐藏特定行。

我正在努力使用 indexPath.row 将行高设置为 0，因为 indexPath.row 不接受 CGFloat 命令。

建议？

编辑:意识到我需要使用 heightForRowAt indexPath: IndexPath 函数，但我很难将它分配给 indexPath.row。

也许更好的问题是:如何设置它以便我知道哪个 indexPath.row 具有“padLock.isHidden == false”。

Answer 1

行高是在单独的委托(delegate)函数中设置的，而不是 cellForRowAt 设置函数。尝试这样的事情:

override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
{
    rowHeight = [your default row height]

    record = frc.object(at: indexPath) as [YourEntity]

    if record.[what indicates locked] == true
    {
        rowHeight = 0
     }

    return CGFloat(rowHeight)
}