使用Swift 4.2和iOS 12，您可以从以下5个完整示例中选择一个，以解决您的问题。
＃1 使用UIView的convert(_:to:)和UITableView的indexPathForRow(at:)
import UIKit
private class CustomCell: UITableViewCell {
let button = UIButton(type: .system)
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
button.setTitle("Tap", for: .normal)
contentView.addSubview(button)
button.translatesAutoresizingMaskIntoConstraints = false
button.centerXAnchor.constraint(equalTo: contentView.centerXAnchor).isActive = true
button.centerYAnchor.constraint(equalTo: contentView.centerYAnchor).isActive = true
button.topAnchor.constraint(equalToSystemSpacingBelow: contentView.topAnchor, multiplier: 1).isActive = true
button.leadingAnchor.constraint(greaterThanOrEqualToSystemSpacingAfter: contentView.leadingAnchor, multiplier: 1).isActive = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
import UIKit
class TableViewController: UITableViewController {
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(CustomCell.self, forCellReuseIdentifier: "CustomCell")
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 3
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomCell
cell.button.addTarget(self, action: #selector(customCellButtonTapped), for: .touchUpInside)
return cell
}
@objc func customCellButtonTapped(_ sender: UIButton) {
let point = sender.convert(CGPoint.zero, to: tableView)
guard let indexPath = tableView.indexPathForRow(at: point) else { return }
print(indexPath)
}
}
＃2。使用UIView的convert(_:to:)和UITableView的indexPathForRow(at:)（替代）
这是前面的示例的替代方法，在该示例中，我们将参数传递nil给。这样，如果第一个响应者未执行该操作，它将被发送到响应者链中的下一个响应者，直到找到正确的实现为止。targetaddTarget(_:action:for:)
import UIKit
private class CustomCell: UITableViewCell {
let button = UIButton(type: .system)
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
button.setTitle("Tap", for: .normal)
button.addTarget(nil, action: #selector(TableViewController.customCellButtonTapped), for: .touchUpInside)
contentView.addSubview(button)
button.translatesAutoresizingMaskIntoConstraints = false
button.centerXAnchor.constraint(equalTo: contentView.centerXAnchor).isActive = true
button.centerYAnchor.constraint(equalTo: contentView.centerYAnchor).isActive = true
button.topAnchor.constraint(equalToSystemSpacingBelow: contentView.topAnchor, multiplier: 1).isActive = true
button.leadingAnchor.constraint(greaterThanOrEqualToSystemSpacingAfter: contentView.leadingAnchor, multiplier: 1).isActive = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
import UIKit
class TableViewController: UITableViewController {
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(CustomCell.self, forCellReuseIdentifier: "CustomCell")
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 3
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomCell
return cell
}
@objc func customCellButtonTapped(_ sender: UIButton) {
let point = sender.convert(CGPoint.zero, to: tableView)
guard let indexPath = tableView.indexPathForRow(at: point) else { return }
print(indexPath)
}
}
＃3。使用UITableView的indexPath(for:)和委托模式
在此示例中，我们将视图控制器设置为单元的委托。轻按单元格的按钮后，它将触发对委托的适当方法的调用。
import UIKit
protocol CustomCellDelegate: AnyObject {
func customCellButtonTapped(_ customCell: CustomCell)
}
class CustomCell: UITableViewCell {
let button = UIButton(type: .system)
weak var delegate: CustomCellDelegate?
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
button.setTitle("Tap", for: .normal)
button.addTarget(self, action: #selector(buttonTapped), for: .touchUpInside)
contentView.addSubview(button)
button.translatesAutoresizingMaskIntoConstraints = false
button.centerXAnchor.constraint(equalTo: contentView.centerXAnchor).isActive = true
button.centerYAnchor.constraint(equalTo: contentView.centerYAnchor).isActive = true
button.topAnchor.constraint(equalToSystemSpacingBelow: contentView.topAnchor, multiplier: 1).isActive = true
button.leadingAnchor.constraint(greaterThanOrEqualToSystemSpacingAfter: contentView.leadingAnchor, multiplier: 1).isActive = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
@objc func buttonTapped(sender: UIButton) {
delegate?.customCellButtonTapped(self)
}
}
import UIKit
class TableViewController: UITableViewController, CustomCellDelegate {
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(CustomCell.self, forCellReuseIdentifier: "CustomCell")
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 3
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomCell
cell.delegate = self
return cell
}
// MARK: - CustomCellDelegate
func customCellButtonTapped(_ customCell: CustomCell) {
guard let indexPath = tableView.indexPath(for: customCell) else { return }
print(indexPath)
}
}
＃4。使用UITableView的indexPath(for:)并为委托关闭
这是前一个示例的替代方法，在前一个示例中，我们使用闭包代替协议委托声明来处理按钮轻击。
import UIKit
class CustomCell: UITableViewCell {
let button = UIButton(type: .system)
var buttontappedClosure: ((CustomCell) -> Void)?
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
button.setTitle("Tap", for: .normal)
button.addTarget(self, action: #selector(buttonTapped), for: .touchUpInside)
contentView.addSubview(button)
button.translatesAutoresizingMaskIntoConstraints = false
button.centerXAnchor.constraint(equalTo: contentView.centerXAnchor).isActive = true
button.centerYAnchor.constraint(equalTo: contentView.centerYAnchor).isActive = true
button.topAnchor.constraint(equalToSystemSpacingBelow: contentView.topAnchor, multiplier: 1).isActive = true
button.leadingAnchor.constraint(greaterThanOrEqualToSystemSpacingAfter: contentView.leadingAnchor, multiplier: 1).isActive = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
@objc func buttonTapped(sender: UIButton) {
buttontappedClosure?(self)
}
}
import UIKit
class TableViewController: UITableViewController {
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(CustomCell.self, forCellReuseIdentifier: "CustomCell")
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 3
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomCell
cell.buttontappedClosure = { [weak tableView] cell in
guard let indexPath = tableView?.indexPath(for: cell) else { return }
print(indexPath)
}
return cell
}
}
＃5。使用UITableViewCell的accessoryType和UITableViewDelegate的tableView(_:accessoryButtonTappedForRowWith:)
如果您的按钮是一个UITableViewCell的标准附件控制，它的任何抽头将触发调用UITableViewDelegate的tableView(_:accessoryButtonTappedForRowWith:)，让您获得相关的索引路径。
import UIKit
private class CustomCell: UITableViewCell {
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
accessoryType = .detailButton
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
import UIKit
class TableViewController: UITableViewController {
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(CustomCell.self, forCellReuseIdentifier: "CustomCell")
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 3
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell", for: indexPath) as! CustomCell
return cell
}
override func tableView(_ tableView: UITableView, accessoryButtonTappedForRowWith indexPath: IndexPath) {
print(indexPath)
}
}