无法调用“保存InBackgroundWithBlock”

Question

var score = PFObject(className: "score")
    score.setObject("Rob", forKey: "name")
    score.setObject(95, forKey: "scoreNumber")
    score.saveInBackgroundWithBlock {
        (success: Bool!, error: NSError) -> Void in
        if success == true {
            println("Score created with ID: \(score.objectId)")
        } else {
            println(error)
        }
    }

Answer 1

error参数应该是隐式展开的可选参数，而不是success参数：

(success: Bool, error: NSError!) -> Void in
              ^               ^

但是，除非出于任何原因需要指定类型，否则我建议您将闭包简单地使用为：

(success, error) in

不太容易出现类型声明错误。