问题
In tableview, on the cells there are buttons in it, need to get the index of tableview means, which index cell's button is clicked. So, not able to implement it in swift 5. So far tried is but this give me wrong value.
let position: CGPoint = sender.convert(CGPoint.zero, to: organizationsTableView)
if let indexPath = organizationsTableView.indexPathForRow(at: position) {
print(indexPath)
}
回答1:
1) In your Custom cell add closure:
class YoutuberTableViewCell: UITableViewCell {
var buttonAction : (() -> ())?
@IBAction func buttonTapped(_ sender: UIButton) {
buttonAction?()
}
}
2) In your cellForRowAt implement the closure
extension ViewController : UITableViewDataSource {
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: cellReuseIdentifier, for: indexPath) as! YoutuberTableViewCell
cell.buttonAction = { [unowned self] in
let selectedIndexPath = indexPath.row
}
return cell
}
}
回答2:
A callback closure is the most efficient way in Swift.
However only capturing the index path in cellForRowAt like in Prakash Shaiva's answer is not sufficient if cells can be inserted, deleted or moved. In this particular case you have to pass the cell
class MyTableViewCell: UITableViewCell {
var callback : ((UITableViewCell) -> Void)?
@IBAction func push(_ sender: UIButton) {
callback?(self)
}
}
and get the current index path for the cell in the closure
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "MyIdentidier", for: indexPath) as! MyTableViewCell
cell.callback = { currentCell in
let currentIndexPath = tableView.indexPath(for: currentCell)!
}
return cell
}
回答3:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell")
let ClickButton = cell.contentView.viewWithTag(1) as? UIButton
ClickButton?.tag = indexPath.row
}
Create a Button action and add your target with param Sender then you get value of indexPath with sender.tag
回答4:
add indexPath.row as a tag to the button inside tableViewCell
button.tag = indexPath.row
button.addTarget(self, action: #selector(buttonClickMethod(_:)), for: .touchUpInside)
If you are using xib then you can add tag to the button from Attribute Inspector
Inside buttonClickMethod you can access the index like this
func buttonClickMethod(_ sender: UIButton){
let index = sender.tag
}
来源：https://stackoverflow.com/questions/58098923/how-to-get-index-path-on-click-of-button-from-uitableview-in-swift-5