如何通过编程方式在TableViewCell内设置固定的ImageView大小？

Question

我有这个问题，我需要在tableviewcell内部固定图像的大小。下图显示图像尺寸不一致。

这是我使用的代码。

 if noteImageIsAvailable == true {
        if let imageData = assignedNotePhoto?.photoData {
            if let image = Utilities.resizePictureImage(UIImage(data: imageData as Data)) {
                //added fix
                cell.imageView?.frame.size = CGSize(width: 36, height: 24)
                cell.imageView?.clipsToBounds = true
                //-----
                cell.imageView?.contentMode = .scaleAspectFill
                cell.imageView?.image = image
            }
        }
    }

我在stackoverflow中阅读了一个答案。它说我需要添加clipToBounds，但不幸的是它不起作用。请帮我解决这个问题。谢谢

TableView代码

extension SettingNoteViewController: UITableViewDataSource, UITableViewDelegate {

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return Menu.SettingNote.items.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = UITableViewCell(style: .subtitle, reuseIdentifier: "reuseIdentifier")
    let keyPass = KeyHelper.NoteSetting.info[indexPath.row]
    let assignedNotePhoto = self.getNotePhoto(key: keyPass.key)
    let assignedNoteTextData = self.getNoteTextData(key: keyPass.key)?.value

    cell.contentView.backgroundColor = .black
    cell.textLabel?.textColor = .white
    cell.detailTextLabel?.textColor = .white
    cell.detailTextLabel?.numberOfLines = 0
    let noteImageIsAvailable = assignedNotePhoto?.photoData != nil

    if noteImageIsAvailable == true {
        if let imageData = assignedNotePhoto?.photoData {
            if let image = Utilities.resizePictureImage(UIImage(data: imageData as Data)) {
                //added fix
                cell.imageView?.translatesAutoresizingMaskIntoConstraints = false
                cell.imageView?.frame.size = CGSize(width: 36, height: 24)
                cell.imageView?.clipsToBounds = true
                //-----
                cell.imageView?.contentMode = UIView.ContentMode.scaleAspectFit
                cell.imageView?.image = image
            }
        }
    }
    cell.textLabel?.text = Menu.SettingNote.items[indexPath.row].value
    cell.detailTextLabel?.text = assignedNoteTextData ?? "noteSettingSubTitle".localized

    return cell
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.destination is InputMemoViewController {
        let vc = segue.destination as! InputMemoViewController
        vc.infoNoteKey = self.infoNoteKeyToPass
        vc.infoLabelText = self.infoLabelToPass
    }
}

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    self.infoNoteKeyToPass = KeyHelper.NoteSetting.info[indexPath.row].key
    self.infoLabelToPass = KeyHelper.NoteSetting.info[indexPath.row].label
    self.performSegue(withIdentifier: "showInputMemo", sender: self)
}

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
   return 80
   }
}

Answer 1

我有相同的问题，scaleAspectFit已为我解决。你可以试试看

cell.imageView.contentMode = UIViewContentMode.scaleAspectFit

Answer 2

[添加cell.imageView?.translatesAutoresizingMaskIntoConstraints = false时，frame无效，因此请尝试使用任何一个

let marginguide = contentView.layoutMarginsGuide


//imageView auto layout constraints

cell.imageView?.translatesAutoresizingMaskIntoConstraints = false

let marginguide = cell.contentView.layoutMarginsGuide

cell.imageView?.topAnchor.constraint(equalTo: marginguide.topAnchor).isActive = true
cell.imageView?.leadingAnchor.constraint(equalTo: marginguide.leadingAnchor).isActive = true
cell.imageView?.heightAnchor.constraint(equalToConstant: 40).isActive = true
cell.imageView?.widthAnchor.constraint(equalToConstant: 40).isActive = true

cell.imageView?.contentMode = .scaleAspectFill
cell.imageView?.layer.cornerRadius = 20 //half of your width or height

并且最好在UITableViewCell中设置约束>