ios - Xcode 6.3 更新导致工作应用程序失败 - 现在工作的不是

Question

我不知道是否还有其他人遇到过这种情况，但我有一个正在构建的应用程序，它运行良好。然后我愚蠢地让mac安装和xcode更新。我知道的下一件事是，我打开项目，但构建失败并出现 21 个错误。我已经修复了其中的 20 个。顺便说一下，任何其他发现此问题的PF_Nullability 错误，check this out .

这对 20 个错误有效，但最后一个错误是在一个正常工作的函数中。在这个函数中，我在 parse.com 上查询一个数据类并获取一个随机对象来填充我的 View controller/app/whatevers 中的变量。我将函数放在下面，这样您就可以看到整个事情，但这是错误的行:

 countQuery.countObjectsInBackgroundWithBlock { (count: Int32, error: NSError!) -> Void in
There error: cannot invoke 'countobjectsinbackgroundwithblock' with an argument list of type '((Int32, NSError!) - Void in)'

这是整个函数，希望它只是像其他 20 个修复一样的语法问题:

     func CallData() {
    var countQuery = PFQuery(className: "QandA")
    countQuery.countObjectsInBackgroundWithBlock { (count: Int32, error: NSError!) -> Void in
        if (error == nil) {
            let randomNumber = Int(arc4random_uniform(UInt32(count)))
            var query = PFQuery(className: "QandA")
            query.skip = randomNumber
            query.limit = 1
            query.findObjectsInBackgroundWithBlock { (objects: [AnyObject]!, error: NSError!) -> Void in
                if (error == nil) {
                    var object: AnyObject = objects[0]
                    self.Question = object  ["Question"] as String!
                    self.Answers = object  ["Answers"] as Array!
                    self.Answer = object  ["Answer"] as String!

                    if (self.Answers.count > 0) {
                        self.QuestionLabel.text = self.Question
                        self.Button1.setTitle(self.Answers[0], forState: UIControlState.Normal)
                        self.Button2.setTitle(self.Answers[1], forState: UIControlState.Normal)
                        self.Button3.setTitle(self.Answers[2], forState: UIControlState.Normal)
                        self.Button4.setTitle(self.Answers[3], forState: UIControlState.Normal)
                    }
                } else {
                    NSLog("Something is wrong with the find request, dude.  Sorry. %@", error)
                }
            }
        } else {
            NSLog("Something is wrong with the count request, dude.  Sorry. %@", error)
        }   
    }
}

关于如何消除该错误的任何想法？为什么它以前工作时现在不工作？谢谢。

Answer 1

好吧，一个错误最终导致了另一个错误，但我终于解决了它......它基本上是语法(我猜也是转换错误，但本质上是转换中的语法错误......我猜......一个这里是问号，那里是感叹号……我是新手，所以我真的不知道，只是通过反复试验)但这是有效的:

  func CallData() {
        var countQuery = PFQuery(className: "QandA")
        countQuery.countObjectsInBackgroundWithBlock { (count: Int32, error: NSError?) -> Void in
            if (error == nil) { let randomNumber = Int(arc4random_uniform(UInt32(count)))
                var query = PFQuery(className: "QandA")
                query.skip = randomNumber; query.limit = 1
                query.findObjectsInBackgroundWithBlock { (objects: [AnyObject]?, error: NSError?) -> Void in
                    if (error == nil) {

                        var object: AnyObject = objects![0]
                        self.Question = object ["Question"] as! String!
                        self.Answers = object ["Answers"] as! Array!
                        self.Answer = object ["Answer"] as! String!
                        if (self.Answers.count > 0) {
                            self.QuestionLabel.text = self.Question
                            self.Button1.setTitle(self.Answers[0], forState: UIControlState.Normal)
                            self.Button2.setTitle(self.Answers[1], forState: UIControlState.Normal)
                            self.Button3.setTitle(self.Answers[2], forState: UIControlState.Normal)
                            self.Button4.setTitle(self.Answers[3], forState: UIControlState.Normal) }
                    } else { 

                        NSLog("Something is wrong with the find request, dude. Sorry. %@", error!) 
                    } 
                }
            } else { 
                NSLog("Something is wrong with the count request, dude. Sorry. %@", error!) 
            } 
        } 
    }