ios - 点击识别器仅在第一个单元格中工作

Question

我有一个带有一个原型(prototype)单元格的 UITableView，我添加了一个长按手势识别器，它在代码中有一个 Action ，如下所示:

 @IBAction func Itinerario(sender: AnyObject) {

    let a = self.tabla
    let b: String = "\n"
    let c: String = "\n"
    let d: String = "*Lugar Destacado"
    let sum = a + b + c + d

    let alert = UIAlertController(title: "Itinerario de Procesión", message: "\(sum)", preferredStyle: UIAlertControllerStyle.Alert)
    let action1 = UIAlertAction(title: "Atrás", style: UIAlertActionStyle.Cancel, handler: nil)

    alert.addAction(action1)


    self.presentViewController(alert, animated: true, completion: nil);



}

但是当我运行项目时，它只对表格的第一个单元格有效。我怎样才能让它适用于所有人？

Answer 1

检查控制台，相当确定您会看到 iOS 9 及更高版本的错误。将手势识别器从单元格移动到表格 View 并说:

@IBAction func Itinerario(sender: UITapGestureRecognizer) {
    //if you need the cell or index path 
    let location = sender.locationInView(self.tableView)
    let indexPath = self.tableView.indexPathForRowAtPoint(location)
    let cell = self.tableView.cellForRowAtIndexPath(indexPath)
    if indexPath != nil
    {
      let a = self.tabla
      let b: String = "\n"
      let c: String = "\n"
      let d: String = "*Lugar Destacado"
      let sum = a + b + c + d

      let alert = UIAlertController(title: "Itinerario de Procesión", message: "\(sum)", preferredStyle: UIAlertControllerStyle.Alert)
      let action1 = UIAlertAction(title: "Atrás", style: UIAlertActionStyle.Cancel, handler: nil)

      alert.addAction(action1)


      self.presentViewController(alert, animated: true, completion: nil);
    }


}