有什么方法可以在 UITableViewCell 中调整 UIImageView 的大小

Question

我正在尝试使用 UIImageView 在 UITableViewCell 中添加图像，并且确实“正常”添加了图像，但是当我更改 UIImageView 的大小时。我收到此错误消息：

[LayoutConstraints] Unable to simultaneously satisfy constraints. Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. ( "<NSLayoutConstraint:0x600001a30b40 UIImageView:0x7fad5ed0fd90.height == 90 (active)>", "<NSLayoutConstraint:0x600001a30b90 V:|-(0)-[UIStackView:0x7fad5ed10360] (active, names: '|':Music.MusicsCell:0x7fad5ed0ec20'cellId' )>", "<NSLayoutConstraint:0x600001a30d70 UIStackView:0x7fad5ed10360.bottom == Music.MusicsCell:0x7fad5ed0ec20'cellId'.bottom (active)>", "<NSLayoutConstraint:0x600001a31270 'UISV-canvas-connection' UIStackView:0x7fad5ed10360.top == UIImageView:0x7fad5ed0fd90.top
(active)>", "<NSLayoutConstraint:0x600001a312c0 'UISV-canvas-connection' V:[UIImageView:0x7fad5ed0fd90]-(0)-| (active, names: '|':UIStackView:0x7fad5ed10360 )>", "<NSLayoutConstraint:0x600001a314f0 'UIView-Encapsulated-Layout-Height' Music.MusicsCell:0x7fad5ed0ec20'cellId'.height == 90.5 (active)>" )

Will attempt to recover by breaking constraint

但我已经尝试了很多东西，比如简单的东西，只是带有背景和大小的图像，例如：

let imageView: UIImageView = UIImageView()
imageView.size(size: CGSize(width: 40, height: 40))
imageView.backgroundColor = .purple
imageView.layer.cornerRadius = 6
imageView.clipsToBounds = true

而且我不知道我必须做什么才能使此警告消息消失。按照下面的代码：

MusicsVC（UITableViewController）：

class MusicsVC: UITableViewController {
    let cellId = "cellId"
    
    override func viewDidLoad() {
        super.viewDidLoad();
        
        tableView.register(MusicsCell.self, forCellReuseIdentifier: cellId)
    }
}

extension MusicsVC {
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 5;
    }
    
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) as! MusicsCell
    
        return cell;
    }
}

UITableViewCell:

class MusicsCell: UITableViewCell {

    let tituloLabel: UILabel = .textLabel(text: "Teste", fontSize: 16);
    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)

        let imageView: UIImageView = UIImageView()
        imageView.size(size: CGSize(width: 60, height: 60))
        imageView.layer.cornerRadius = 6
        imageView.clipsToBounds = true
        
        imageView.load(url: "https://studiosol-a.akamaihd.net/uploadfile/letras/fotos/d/7/4/2/d74238794c3024afbcba997e444fd2cb.jpg")
        
        let stackView = UIStackView(arrangedSubviews: [
            imageView,
            tituloLabel
        ])
        
        stackView.spacing = 12
        
        addSubview(stackView)
        stackView.inset(view: stackView, insets: UIEdgeInsets(top: 6, left: 12, bottom: 6, right: 12))
    }
    
    required init?(coder: NSCoder) {
        fatalError()
    }
}

Answer 1

我想你想要这个，但你的代码有点混乱，不知道你真正想要什么......声明你的 table 视图，并添加约束：

class ViewController: UIViewController {

let tableView = UITableView()
let cellId = "cellId"

override func viewDidLoad() {
    super.viewDidLoad()
    
    view.backgroundColor = .white
    
    tableView.delegate = self
    tableView.dataSource = self
    tableView.register(MusicsCell.self, forCellReuseIdentifier: cellId)
    tableView.translatesAutoresizingMaskIntoConstraints = false
    
    view.addSubview(tableView)
    tableView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
    tableView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
    tableView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
    tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
 }
}

现在委托和数据源

extension ViewController: UITableViewDelegate, UITableViewDataSource {

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return 5
}

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    return 72 // 60 image view height + 6x2 padding from top and bottom = 72
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) as! MusicsCell
    
    return cell;
 }
}

这是你的手机的样子：

class MusicsCell: UITableViewCell {

let tituloLabel: UILabel = {
    let label = UILabel()
    label.text = "Testo"
    label.font = .systemFont(ofSize: 16, weight: .regular)
    label.translatesAutoresizingMaskIntoConstraints = false
    return label
}()

let myImageView: UIImageView = {
    let iv = UIImageView()
    iv.contentMode = .scaleAspectFill
    iv.layer.cornerRadius = 6
    iv.clipsToBounds = true
    iv.translatesAutoresizingMaskIntoConstraints = false
    
    return iv
}()

override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)

    guard let url = URL(string: "https://studiosol-a.akamaihd.net/uploadfile/letras/fotos/d/7/4/2/d74238794c3024afbcba997e444fd2cb.jpg") else {return}
    myImageView.downloadImage(from: url) // this is my extension to load image from url, you can use yours
    
    contentView.addSubview(myImageView)
    myImageView.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 6).isActive = true
    myImageView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 12).isActive = true
    myImageView.widthAnchor.constraint(equalToConstant: 60).isActive = true
    myImageView.heightAnchor.constraint(equalToConstant: 60).isActive = true
    
    contentView.addSubview(tituloLabel)
    tituloLabel.topAnchor.constraint(equalTo: myImageView.topAnchor).isActive = true
    tituloLabel.leadingAnchor.constraint(equalTo: myImageView.trailingAnchor, constant: 10).isActive = true
    tituloLabel.trailingAnchor.constraint(equalTo: contentView.trailingAnchor).isActive = true
    tituloLabel.bottomAnchor.constraint(equalTo: myImageView.bottomAnchor).isActive = true
}

required init?(coder: NSCoder) {
    fatalError()
 }
}

这是结果

有什么方法可以在 UITableViewCell 中调整 UIImageView 的大小

Is there any way to resize UIImageView inside UITableViewCell

iphone

ios

swift

swift5