I encountered a bug with drag-and-drop sorting in ios 26.
I created a UITableView for dragging and dropping to adjust the order of the list. However, when I set the height of the cells to a custom height, some cells were not displayed during the dragging process.
The tools I use are the official version of Xcode16.1 and the ios 26 emulator
And I can also reproduce the same problem on the real device.
class ViewController: UIViewController {
private let tableView: UITableView = {
let tableView = UITableView.init(frame: .zero, style: .grouped)
tableView.backgroundColor = .clear
tableView.estimatedSectionHeaderHeight = 50
tableView.isEditing = true
tableView.showsVerticalScrollIndicator = false
tableView.allowsSelectionDuringEditing = true
return tableView
}()
var content: [Int] = []
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(FTWatchGroupPageCell.self, forCellReuseIdentifier: "FTWatchGroupPageCell")
tableView.delegate = self
tableView.dataSource = self
view.addSubview(tableView)
for i in 1...100 {
content.append(i)
}
tableView.reloadData()
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
var frame = view.bounds
frame.origin.y = 200
frame.size.height = frame.size.height - 200
tableView.frame = frame
}
}
extension ViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return content.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "FTWatchGroupPageCell", for: indexPath) as! FTWatchGroupPageCell
cell.label.text = "\(content[indexPath.row])"
cell.label.sizeToFit()
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 52.66
}
public func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 0.01
}
public func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return 0.01
}
public func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
public func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCell.EditingStyle {
return .none
}
public func tableView(_ tableView: UITableView, shouldIndentWhileEditingRowAt indexPath: IndexPath) -> Bool {
return false
}
public func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
return true
}
public func tableView(_ tableView: UITableView, moveRowAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
let item = content.remove(at: sourceIndexPath.row)
content.insert(item, at: destinationIndexPath.row)
tableView.reloadData()
}
}
class FTWatchGroupPageCell: UITableViewCell {
private let contentBackView = UIView()
let label = UILabel()
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
contentView.isHidden = true
addSubview(contentBackView)
contentBackView.backgroundColor = .red
contentBackView.addSubview(label)
label.textColor = .black
label.font = .systemFont(ofSize: 14)
contentBackView.frame = .init(x: 0, y: 0, width: 200, height: 30)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func layoutSubviews() {
super.layoutSubviews()
guard let reorderControlClass = NSClassFromString("UITableViewCellReorderControl"),
let reorderControl = subviews.first(where: { $0.isKind(of: reorderControlClass) }) else {
return
}
reorderControl.alpha = 0.02
reorderControl.subviews.forEach({ subView in
if let imageView = subView as? UIImageView {
imageView.image = UIImage()
imageView.contentMode = .scaleAspectFit
imageView.frame.size = CGSize(width: 20, height: 20)
}
})
}
}
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