ios didSelectRowAtIndexPath 不起作用，Swift 3
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didSelectRowAtIndexPath not working, Swift 3
提问by TheValyreanGroup
Can anyone see why in the world didSelectRowAtIndexPath would not be called? I have triple checked by delegateboth in the code and in storyboard.
谁能看出为什么不会调用 didSelectRowAtIndexPath ？我delegate在代码和故事板中都进行了三重检查。
class AddCard: UIViewController,UIPopoverPresentationControllerDelegate, UITableViewDataSource, UITableViewDelegate {
@IBOutlet weak var cardView: UIView!
@IBOutlet weak var tableView: UITableView!
let tableItems = ["Background Color","Background Image","Font Style","Font Color"]
let cellID = "cell"
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func setBackgroundColor (_ color: UIColor) {
cardView.backgroundColor = color
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return tableItems.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: cellID, for: indexPath as IndexPath)
let row = indexPath.row
cell.textLabel?.text = tableItems[row]
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: IndexPath) {
tableView.deselectRow(at: indexPath as IndexPath, animated: true)
print(indexPath.row)
let row = indexPath.row
switch(row){
case 0:
let popoverVC = storyboard?.instantiateViewController(withIdentifier: "colorPickerVC") as! ColorPickerViewController
popoverVC.modalPresentationStyle = .popover
popoverVC.preferredContentSize = CGSize(width: 284, height: 446)
if let popoverController = popoverVC.popoverPresentationController {
popoverController.sourceView = self.view
popoverController.sourceRect = CGRect(x: 0, y: 0, width: 85, height: 30)
popoverController.permittedArrowDirections = .any
popoverController.delegate = self
popoverVC.delegate = self
}
present(popoverVC, animated: true, completion: nil)
break
default: break
}
}
}
回答by Larme
Swift 3 modified the signature of the method (a lot of methods too, new "rules"/style)
Swift 3 修改了方法的签名（方法也很多，新的“规则”/样式）
Replace:func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: IndexPath)with func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
替换：func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: IndexPath)用func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
Notice the _, the didSelectRowAtvs didSelectRowAtIndexPath, like the other ones you updated (which adapted also the same "style"), but not this one.
注意_、didSelectRowAtvs didSelectRowAtIndexPath，就像你更新的其他的一样（也适应了相同的“风格”），但不是这个。
Remove the line and let XCode do the autocompletion. Else, you can just replace it with the one from the doc.
删除该行并让 XCode 进行自动完成。否则，您可以将其替换为文档中的那个。
