选中单元格iOS cell时的复选框功能

Question

我有一个带有可重用单元格的表视图。我已将图像视图放置为复选框，以指示是否选中了行。每当选定一行时，图像就会相应地发生相应的变化，但是正在被重用的另一个单元格的图像也会发生变化。我试图通过保存状态来建模，并将其反映到视图中，但我仍然无法解决这个问题，因为indexPath在某些单元格之后继续重复。

var allvacc: [[String:String]] = [
    [
        "id":"0",
        "name":"BCG",
        "timeAfterBirth":"1",
        "description":"BCG stands for Bacillus Calmette–Guérin given to a baby 1 times as soon as possible after birth for protection against Tuberculosis",
        "isChecked": "false",
    ],
    [
        "id":"1",
        "name":"DPT-HepB-HiB - I",
        "timeAfterBirth":"42",
        "description":"DPT refers to a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis (whooping cough), and tetanus. Hepatitis B adn Hemophilius Influenza. This vaccine is taken 3 times in 6, 10 and 14 weeks.",
        "isChecked": "false",
    ] 
]

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        allVacc[indexPath.row]["isChecked"] = "true"
        vaccineTableView.reloadData()


    }

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        guard let checkListCell = tableView.dequeueReusableCellWithIdentifier("vaccineCheckListCell") as? VaccineCheckListCell else {
            return UITableViewCell() }
        checkListCell.vaccineNameLabel.text = vaccinationList[indexPath.row].name
        if  allVacc[indexPath.row]["isChecked"] == "true" {
            checkListCell.vaccineStatusImage.image = UIImage(named: "ic_check_circle_yellow_48dp")
        }
        return checkListCell
    }

Answer 1

加载表时分配未检查的图像。这是懒散的地方

     override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
                guard let checkListCell = tableView.dequeueReusableCellWithIdentifier("vaccineCheckListCell") as? VaccineCheckListCell else {
                    return UITableViewCell() }
                checkListCell.vaccineNameLabel.text = vaccinationList[indexPath.row].name
                checkListCell.vaccineStatusImage.image = your unchecked image

 if  allVacc[indexPath.row]["isChecked"] == "true" {
                    checkListCell.vaccineStatusImage.image = UIImage(named: "ic_check_circle_yellow_48dp")
                }
                return checkListCell
            }

Answer 2

在这里输入图像描述原因是，当图像未被选中时，没有重置它。这是一个简单的解决方案：

if  allVacc[indexPath.row]["isChecked"] == "true" {
    checkListCell.vaccineStatusImage.image = UIImage(named: "ic_check_circle_yellow_48dp")
} else {
    checkListCell.vaccineStatusImage.image = nil //or your unchecked image
}