原型 tableView 单元格中的滚动问题

Posted 2023-03-12

【中文标题】原型 tableView 单元格中的滚动问题

【英文标题】：Issue with Scrolling in prototype tableView Cell

【发布时间】：2018-02-09 02:03:31

【问题描述】：

谁能解释为什么滚动视图会在.gif 中的某些单元格中选择步进器时自动向上滚动，这是在按下 2p 燕尾服时发生的（并非所有单元格都发生）下面是视图控制器 (Service1ViewController) 的代码，代码为单元格（Service1TableViewCell）和初始化函数（Service）的代码

我用提供的答案更新了代码，下面开始出现的这个问题是更新的代码以及更新的 .gif 文件。

[![更新问题][1]][1]

Service1ViewController

class Service1ViewController: UIViewController 

@IBOutlet weak var Service1IMG: UIImageView!
@IBOutlet weak var service1TableView: UITableView!

@IBOutlet weak var service1Total: UILabel!



var Dry: [Service1] = []

var orderCount = [Int : Int]()

override func viewDidLoad() 
    super.viewDidLoad()

    Dry = Options()
    for i in 0...30// TotaL number of rows
    
        orderCount[i] = 0 // DEFAULT order count will be 0
    




func Options() -> [Service1]

    var dryOptions: [Service1] = []

    let option1 = Service1(titled: "Pants", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option2 = Service1(titled: "Shirt", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option3 = Service1(titled: "Polo Shirt", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option4 = Service1(titled: "Polo (Long Sleeves)", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option5 = Service1(titled: "Shorts", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option6 = Service1(titled: "Tie", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option7 = Service1(titled: "2 Pc Tuxedo", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option8 = Service1(titled: "Jacket", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option9 = Service1(titled: "Men's 2pc Suite", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option10 = Service1(titled: "Blouse", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option11 = Service1(titled: "Skirt", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option12 = Service1(titled: "Women's 2pc Suite", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option13 = Service1(titled: "Dress", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option14 = Service1(titled: "Sweater", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option15 = Service1(titled: "Semi Formal Dress", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option16 = Service1(titled: "Customer Bag", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option17 = Service1(titled: "Jumpsuite", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option18 = Service1(titled: "Over Coat", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option19 = Service1(titled: "Rain Coat", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option20 = Service1(titled: "Skirt W/Pleats", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option21 = Service1(titled: "Robe", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option22 = Service1(titled: "Comforter /King", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option23 = Service1(titled: "Comforter /Queen", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option24 = Service1(titled: "Comforter /Twin", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option25 = Service1(titled: "Long Jacket", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option26 = Service1(titled: "Winter Jacket", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option27 = Service1(titled: "Men's 3pc Suite", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option28 = Service1(titled: "Women's 3pc Suite", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option29 = Service1(titled: "Overall", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option30 = Service1(titled: "Table Cloth/Small", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))
    let option31 = Service1(titled: "Shawl", pricing: 5.29, image: #imageLiteral(resourceName: "DryCleaning"))

    dryOptions.append(option1)
    dryOptions.append(option2)
    dryOptions.append(option3)
    dryOptions.append(option4)
    dryOptions.append(option5)
    dryOptions.append(option6)
    dryOptions.append(option7)
    dryOptions.append(option8)
    dryOptions.append(option9)
    dryOptions.append(option10)
    dryOptions.append(option11)
    dryOptions.append(option12)
    dryOptions.append(option13)
    dryOptions.append(option14)
    dryOptions.append(option15)
    dryOptions.append(option16)
    dryOptions.append(option17)
    dryOptions.append(option18)
    dryOptions.append(option19)
    dryOptions.append(option20)
    dryOptions.append(option21)
    dryOptions.append(option22)
    dryOptions.append(option23)
    dryOptions.append(option24)
    dryOptions.append(option25)
    dryOptions.append(option26)
    dryOptions.append(option27)
    dryOptions.append(option28)
    dryOptions.append(option29)
    dryOptions.append(option30)
    dryOptions.append(option31)

    return dryOptions




extension Service1ViewController: UITableViewDataSource,UITableViewDelegate
  @IBAction func stepperAcn(_ sender: UIStepper) 
    let cellPosition = sender.convert(CGPoint.zero, to: service1TableView)
    let indPath : IndexPath = service1TableView.indexPathForRow(at:    cellPosition)!

    orderCount[indPath.row] = Int(sender.value)

    service1TableView.beginUpdates()
    service1TableView.reloadRows(at: [indPath], with: UITableViewRowAnimation.none)
    service1TableView.endUpdates()
    //service1TableView.reloadData()



func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 

    return Dry.count




func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 
    let Dry1 = Dry[indexPath.row]

    let cell = tableView.dequeueReusableCell(withIdentifier: "Service1Cell") as! Service1TableViewCell
    cell.setService1(Dry: Dry1)
    cell.quantityStepper.tag = indexPath.row
    cell.stepperLabel.text = String(orderCount[indexPath.row]!) // PASS VALUES TO LABEL
    cell.quantityStepper.value = Double(orderCount[indexPath.row]!) // PASS VALUES TO STEPPER

    cell.selectionStyle = .none

    return cell


// add function to collect (didSelectRowAt) and send selected data to cart
 func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)            

Service1TableViewCell

class Service1TableViewCell: UITableViewCell 


@IBOutlet weak var quantityLabel: UILabel!
@IBOutlet weak var quantityStepper: UIStepper!
@IBOutlet weak var Service1image: UIImageView!
@IBOutlet weak var serviceTitle: UILabel!
@IBOutlet weak var pricingInfo: UILabel!
@IBOutlet weak var stepperLabel: UILabel!



func setService1(Dry: Service1)
    Service1image.image = Dry.service1image
    pricingInfo.text = Dry.service1Pricing.description
    serviceTitle.text = Dry.service1Title


//save data from each cell and multiply for total service


override func awakeFromNib() 
    super.awakeFromNib()
    // Initialization code


override func setSelected(_ selected: Bool, animated: Bool) 
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state

服务

class Service

var title: String
var description: String
var image: UIImage



init(titled: String, description: String, image: UIImage)

    self.title = titled
    self.description = description
    self.image = image

【问题讨论】：

显示您的代码。

我用代码编辑的不好

在设备中试用。

模拟器和设备都试过了

如何为下面的图像和标签设置约束

【参考方案1】：

这个问题可能来自重新加载整个 TableView。让我们一起去reloadRows

@IBAction func stepperAcn(_ sender: UIStepper) 

    let cellPosition = sender.convert(CGPoint.zero, to: service1TableView)
    let indPath : IndexPath = service1TableView.indexPathForRow(at: cellPosition)!

    orderCount[indPath.row] = Int(sender.value)

    service1TableView.beginUpdates()
    service1TableView.reloadRows(at: [indPath], with: UITableViewRowAnimation.none)
    service1TableView.endUpdates()

    //service1TableView.reloadData()

【讨论】：

错误仍然存​​在，但没有以前那么糟糕，他们有什么方法可以为每个单元格的表格视图进行分页，所以当您将每个 cel 剪辑滚动到顶部约束时？

检查，你的编码中是否有其他 reloadData()

刚刚我是否删除了 service1TableView.reloadData()，现在当某些单元格位于屏幕中的某个位置时，下面的单元格会垂直向下反弹

cellPosition CGPoint (x = 266, y = 314) 这是发生新错误的时间