didSelectRowAtIndexPath 不起作用，Swift 3 [英] didSelectRowAtIndexPath not working, Swift 3

问题描述

有人能明白为什么不会调用 didSelectRowAtIndexPath 吗?我在代码和故事板中都通过 delegate 进行了三次检查.

Can anyone see why in the world didSelectRowAtIndexPath would not be called? I have triple checked by delegate both in the code and in storyboard.

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

    }
}

}

推荐答案

Swift 3 修改了方法的签名(方法也很多，新的规则"/样式)

Swift 3 modified the signature of the method (a lot of methods too, new "rules"/style)

替换:
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: IndexPath) 和
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)

注意 _、didSelectRowAt 和 didSelectRowAtIndexPath，就像你更新的其他的一样(它们也采用了相同的风格")，但不是这个.

Notice the _, the didSelectRowAt vs didSelectRowAtIndexPath, like the other ones you updated (which adapted also the same "style"), but not this one.

删除该行并让 XCode 自动完成.否则，您可以将其替换为文档中的那个.

Remove the line and let XCode do the autocompletion. Else, you can just replace it with the one from the doc.

这篇关于didSelectRowAtIndexPath 不起作用，Swift 3的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！