Question

在我的应用程序中，我在UITableView上显示了“群组”。

有些群组是免费的，有些群体是应用内购买。

应用内购买的群组在cellForRowAtIndexPath中设置的该行上有挂锁的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“隐藏锁定项目”的选项设置

当用户选择此项时，我想隐藏锁定的组（或非购买的项目）。我认为实现这一目标的最佳方法是通过将行高设置为0来隐藏特定的行。

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：实现我需要使用heightForRowAt indexPath：IndexPath函数，但是我很难将它分配给indexPath.row。

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

Answer 1

行高在单独的委托函数中设置，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)
}

Answer 2

您可以使用tableView（height forRow}方法。）

然后（用于重新加载tableView的布局），使用方法：tableView.beginUpdates，然后tableView.endingUpdates

对于选定的行（swift）

2 个答案: