Как я уже упоминал в комментариях, вот один из подходов:
- добавить свои кнопки в ячейку
- добавить представление «контейнер» в ячейку
- ограничить представление контейнера так, чтобы он перекрывал / перекрывал кнопки
- добавить распознаватель жестов панорамирования в представление контейнера, чтобы вы могли перетаскивать его влево / вправо
- при перетаскивании влево, он будет " раскрыть "кнопки под ними
Вы теряете все встроенные функции смахивания, но это один из подходов, который может дать вам дизайн, который вы собираетесь использовать.
Сначала пример создания «перетаскиваемого вида»:
class DragTestViewController: UIViewController {
let backgroundView = UIView()
let containerView = UIView()
// leading and trailing constraints for the drag view
private var leadingConstraint: NSLayoutConstraint!
private var trailingConstraint: NSLayoutConstraint!
private let origLeading = CGFloat(60.0)
private let origTrailing = CGFloat(-60.0)
private var currentLeading = CGFloat(60.0)
private var currentTrailing = CGFloat(-60.0)
override func viewDidLoad() {
super.viewDidLoad()
backgroundView.translatesAutoresizingMaskIntoConstraints = false
backgroundView.backgroundColor = .cyan
backgroundView.clipsToBounds = true
containerView.translatesAutoresizingMaskIntoConstraints = false
containerView.backgroundColor = .red
// add a label to the container view
let exampleLabel = UILabel()
exampleLabel.translatesAutoresizingMaskIntoConstraints = false
exampleLabel.text = "Drag Me"
exampleLabel.textColor = .yellow
containerView.addSubview(exampleLabel)
backgroundView.addSubview(containerView)
view.addSubview(backgroundView)
leadingConstraint = containerView.leadingAnchor.constraint(equalTo: backgroundView.leadingAnchor, constant: origLeading)
trailingConstraint = containerView.trailingAnchor.constraint(equalTo: backgroundView.trailingAnchor, constant: origTrailing)
NSLayoutConstraint.activate([
// constrain backgroundView top to top + 80
backgroundView.topAnchor.constraint(equalTo: view.topAnchor, constant: 80.0),
// constrain backgroundView leading / trailing to leading / trailing with 40-pt "padding"
backgroundView.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 40.0),
backgroundView.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -40.0),
// constrain height to 100
backgroundView.heightAnchor.constraint(equalToConstant: 100.0),
// constrain containerView top / bottom to backgroundView top / bottom with 8-pt padding
containerView.topAnchor.constraint(equalTo: backgroundView.topAnchor, constant: 8.0),
containerView.bottomAnchor.constraint(equalTo: backgroundView.bottomAnchor, constant: -8.0),
// activate leading / trailing constraints
leadingConstraint,
trailingConstraint,
// constrain the example label centered in the container view
exampleLabel.centerXAnchor.constraint(equalTo: containerView.centerXAnchor),
exampleLabel.centerYAnchor.constraint(equalTo: containerView.centerYAnchor),
])
// pan gesture recognizer
let p = UIPanGestureRecognizer(target: self, action: #selector(self.drag(_:)))
containerView.addGestureRecognizer(p)
}
@objc func drag(_ g: UIPanGestureRecognizer) -> Void {
// when we get a Pan on the containerView - a "drag" ...
guard let sv = g.view?.superview else {
return
}
let translation = g.translation(in: sv)
switch g.state {
case .began:
// update current vars
currentLeading = leadingConstraint.constant
currentTrailing = trailingConstraint.constant
case .changed:
// only track left-right dragging
leadingConstraint.constant = currentLeading + translation.x
trailingConstraint.constant = currentTrailing + translation.x
default:
break
}
}
}
Этот код выдаст следующее:
A red view with a centered label, inside a cyan view. You can drag the red "container" view left and right.
Add a view controller to a new project and assign its Custom Class to DragTestViewController from the above code. There are no @IBOutlet or @IBAction connections, so you should be able to run it as-is. See if you can drag the red view.
Using that as a starting point, we can get this:
введите описание изображения здесь
с этим кодом:
// simple rounded-corner shadowed view
class ShadowRoundedView: UIView {
let shadowLayer: CAShapeLayer = CAShapeLayer()
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
func commonInit() -> Void {
self.layer.addSublayer(shadowLayer)
clipsToBounds = false
backgroundColor = .clear
shadowLayer.fillColor = UIColor.white.cgColor
shadowLayer.shadowColor = UIColor.black.cgColor
shadowLayer.shadowOffset = CGSize(width: 0.0, height: 1.0)
shadowLayer.shadowRadius = 4.0
shadowLayer.shadowOpacity = 0.6
shadowLayer.shouldRasterize = true
shadowLayer.rasterizationScale = UIScreen.main.scale
}
override func layoutSubviews() {
super.layoutSubviews()
let pth = UIBezierPath(roundedRect: bounds, cornerRadius: 16.0)
shadowLayer.path = pth.cgPath
}
}
// simple rounded button
class RoundedButton: UIButton {
override func layoutSubviews() {
super.layoutSubviews()
layer.cornerRadius = bounds.size.height * 0.5
}
}
class DragRevealCell: UITableViewCell {
// callback closure for button taps
var callback: ((Int) -> ())?
// this will hold the "visible" labels, and will initially cover the buttons
let containerView: ShadowRoundedView = {
let v = ShadowRoundedView()
v.translatesAutoresizingMaskIntoConstraints = false
return v
}()
// this will hold the buttons
let buttonsView: UIView = {
let v = UIView()
v.translatesAutoresizingMaskIntoConstraints = false
v.clipsToBounds = true
return v
}()
// a "delete" button
let deleteButton: RoundedButton = {
let v = RoundedButton()
v.translatesAutoresizingMaskIntoConstraints = false
v.setTitle("Delete", for: [])
v.setTitleColor(.blue, for: [])
v.setTitleColor(.lightGray, for: .highlighted)
v.backgroundColor = .white
return v
}()
// an "update" button
let updateButton: RoundedButton = {
let v = RoundedButton()
v.translatesAutoresizingMaskIntoConstraints = false
v.setTitle("Update", for: [])
v.setTitleColor(.white, for: [])
v.setTitleColor(.lightGray, for: .highlighted)
v.backgroundColor = .blue
return v
}()
// single label for this example cell
let myLabel: UILabel = {
let v = UILabel()
v.translatesAutoresizingMaskIntoConstraints = false
v.numberOfLines = 0
return v
}()
// leading and trailing constraints for the container view
private var leadingConstraint: NSLayoutConstraint!
private var trailingConstraint: NSLayoutConstraint!
private let origLeading = CGFloat(8.0)
private let origTrailing = CGFloat(-8.0)
private var currentLeading = CGFloat(0.0)
private var currentTrailing = CGFloat(0.0)
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
func commonInit() -> Void {
// cell background color
backgroundColor = UIColor(white: 0.95, alpha: 1.0)
// add buttons to buttons container view
buttonsView.addSubview(deleteButton)
buttonsView.addSubview(updateButton)
// add label to container view -- this is where you would add all your labels, stack views, image views, etc.
containerView.addSubview(myLabel)
// add buttons view first
addSubview(buttonsView)
// add container view second - this will "overlay" it on top of the buttons view
addSubview(containerView)
// containerView leading / trailing constraints - these will be updated as we drag
leadingConstraint = containerView.leadingAnchor.constraint(equalTo: leadingAnchor, constant: origLeading)
trailingConstraint = containerView.trailingAnchor.constraint(equalTo: trailingAnchor, constant: origTrailing)
// needed to avoid layout warnings
let bottomConstraint = containerView.bottomAnchor.constraint(equalTo: bottomAnchor, constant: -8.0)
bottomConstraint.priority = UILayoutPriority(rawValue: 999)
NSLayoutConstraint.activate([
containerView.topAnchor.constraint(equalTo: topAnchor, constant: 8.0),
leadingConstraint,
trailingConstraint,
bottomConstraint,
myLabel.topAnchor.constraint(equalTo: containerView.topAnchor, constant: 8.0),
myLabel.leadingAnchor.constraint(equalTo: containerView.leadingAnchor, constant: 20.0),
myLabel.trailingAnchor.constraint(equalTo: containerView.trailingAnchor, constant: -20.0),
myLabel.bottomAnchor.constraint(equalTo: containerView.bottomAnchor, constant: -8.0),
myLabel.heightAnchor.constraint(equalToConstant: 120.0),
buttonsView.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -8.0),
buttonsView.centerYAnchor.constraint(equalTo: containerView.centerYAnchor),
deleteButton.topAnchor.constraint(equalTo: buttonsView.topAnchor, constant: 0.0),
deleteButton.leadingAnchor.constraint(equalTo: buttonsView.leadingAnchor, constant: 8.0),
deleteButton.trailingAnchor.constraint(equalTo: buttonsView.trailingAnchor, constant: -8.0),
updateButton.bottomAnchor.constraint(equalTo: buttonsView.bottomAnchor, constant: 0.0),
updateButton.leadingAnchor.constraint(equalTo: buttonsView.leadingAnchor, constant: 8.0),
updateButton.trailingAnchor.constraint(equalTo: buttonsView.trailingAnchor, constant: -8.0),
updateButton.topAnchor.constraint(equalTo: deleteButton.bottomAnchor, constant: 12.0),
updateButton.heightAnchor.constraint(equalTo: deleteButton.heightAnchor),
updateButton.widthAnchor.constraint(equalTo: deleteButton.widthAnchor),
deleteButton.widthAnchor.constraint(equalToConstant: 120.0),
deleteButton.heightAnchor.constraint(equalToConstant: 40.0),
])
// delete button border
deleteButton.layer.borderColor = UIColor.blue.cgColor
deleteButton.layer.borderWidth = 1.0
// targets for button taps
deleteButton.addTarget(self, action: #selector(self.deleteTapped(_:)), for: .touchUpInside)
updateButton.addTarget(self, action: #selector(self.updateTapped(_:)), for: .touchUpInside)
// pan gesture recognizer
let p = UIPanGestureRecognizer(target: self, action: #selector(self.drag(_:)))
containerView.addGestureRecognizer(p)
}
@objc func drag(_ g: UIPanGestureRecognizer) -> Void {
// when we get a Pan on the container view - a "drag" ...
guard let sv = g.view?.superview else {
return
}
let translation = g.translation(in: sv)
switch g.state {
case .began:
currentLeading = leadingConstraint.constant
currentTrailing = trailingConstraint.constant
case .changed:
// only track left-right dragging
// don't allow drag-to-the-right
if currentLeading + translation.x <= origLeading {
leadingConstraint.constant = currentLeading + translation.x
trailingConstraint.constant = currentTrailing + translation.x
}
default:
// if the drag-left did not fully reveal the buttons, animate the container view back in place
if containerView.frame.maxX > buttonsView.frame.minX {
self.leadingConstraint.constant = self.origLeading
self.trailingConstraint.constant = self.origTrailing
UIView.animate(withDuration: 0.3, animations: {
self.layoutIfNeeded()
}, completion: { _ in
//self.dragX = 0.0
})
}
}
}
@objc func deleteTapped(_ sender: Any?) -> Void {
callback?(0)
}
@objc func updateTapped(_ sender: Any?) -> Void {
callback?(1)
}
}
class DragRevealTableViewController: UITableViewController {
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(DragRevealCell.self, forCellReuseIdentifier: "DragRevealCell")
tableView.separatorStyle = .none
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let c = tableView.dequeueReusableCell(withIdentifier: "DragRevealCell", for: indexPath) as! DragRevealCell
c.myLabel.text = "Row \(indexPath.row)" + "\n" + "This is where you would populate the cell's labels, image views, any other UI elements, etc."
c.selectionStyle = .none
c.callback = { value in
if value == 0 {
print("Delete action")
} else {
print("Update action")
}
}
return c
}
}
Добавьте UITableViewController проект и назначьте его Custom Class DragRevealTableViewController из приведенного выше кода. Опять же, нет подключений @IBOutlet или @IBAction, поэтому вы сможете запустить его как есть.
ПРИМЕЧАНИЕ: Это только пример кода , и его не следует рассматривать как «готовый к производству» !!! Он реализован лишь частично и, вероятно, потребуется совсем немного больше работы. Но это может стать хорошей отправной точкой.