ios - Firebase 完成 block

Question

我在使用 Firebase 时遇到了一个奇怪的问题。我正在将数据保存到服务器，但从未触发完成 block :

        //get the current user and update the info
        let fbID:String = userData?.objectForKey("facebookID") as! String;
        let ref = Firebase(url:self.FIREBASE_URL)
        let userRef = ref.childByAppendingPath("user").childByAppendingPath(fbID)
        let update = ["work" : work , "school" : school, "description": about]

        userRef.updateChildValues(update, withCompletionBlock: { (error:NSError?, ref:Firebase!) in
            print("This never prints in the console")

        })

数据完美保存在 Firebase 服务器上，但从未触发完成 block 。

我试过在主线程上包装回调，这没有什么区别:

        userRef.updateChildValues(update, withCompletionBlock: { (error:NSError?, ref:Firebase!) in
    dispatch_async(dispatch_get_main_queue()) {
            print("This never prints in the console")
        }
        }) 

有没有人见过这个？

Answer 1

代码有效， block 被调用并通过以下修改打印到控制台:

//get the current user and update the info
let work:String = "work value"
let school:String = "school value"
let about:String = "about value"
let fbID:String = "key_0"
let userRef = myRootRef.childByAppendingPath("user").childByAppendingPath(fbID)
let update = ["work" : work , "school" : school, "description": about]

userRef.updateChildValues(update, withCompletionBlock: { (error:NSError?, ref:Firebase!) in
    print("This never prints in the console")

})

我会调查变量；特别是用于构建 userRef 的引用。