UIAlertAction错误

Question

我试图向一个UIAlertController添加一些操作，但是当我传递一个闭包时，我会得到一个错误。我想将这个闭包作为一个操作的处理程序传递，但是我得到了一个错误消息。

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 override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){

        let optionMenu = UIAlertController(title: nil, message: "What do you want to do?", preferredStyle: .ActionSheet)
        let cancel = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
        optionMenu.addAction(cancel)

        self.presentViewController(optionMenu, animated: true, completion: nil)



        let callActionHandler = { (action:UIAlertAction) -> Void in

          let alertMessage = UIAlertController(title: "No service", message: "Sorry the phone option is not working right now, try again later", preferredStyle: .Alert)

            alertMessage.addAction(UIAlertAction(title: "Ok", style: .Default, handler: nil))

            self.presentViewController(alertMessage, animated: true, completion: nil)

        }

        let callAction = UIAlertAction(title: "Call " + "123-000-\(indexPath.row)", style: UIAlertActionStyle.Default , handler: callActionHandler)



        optionMenu.addAction(callAction)


    }

Answer 1

解决了。只有你错过的!。更改下面一行

let callActionHandler = { (action:UIAlertAction) -> Void in

使用

let callActionHandler = { (action:UIAlertAction!) -> Void in

就这样！