PFObject 无法转换为自定义子类

Question

在最近更新 swift 编译器更新之前，此代码运行良好。我已经纠正了所有明显的错误，但是由于某种原因，当我现在运行应用程序时，它在尝试将 [AnyObject] 转换为我的自定义 Memory 类时在 for in loop 中崩溃。

日志和错误显示如下：

Has connectivity
Successfully retrieved 8 memories.
current memory: <Memories: 0x170120960, objectId: AO3EvPFob4, localId: (null)> {
ACL = "<PFACL: 0x174047e30>";
Date = "3915-04-08 05:00:00 +0000";
Guests = 4;
Title = test4;
}
Could not cast value of type 'PFObject' (0x100130bc0) to 'MemoryVault.Memory' (0x10012fa00).

所以我知道我正在从 Parse 检索 8 个正确的记忆，并且当前的记忆是正确的......它只是不会投射它。

代码：

    if (NetworkValidator.hasConnectivity()){ // Has internet connectivity
        println("Has connectivity")
        Memory.memoryQuery().findObjectsInBackgroundWithBlock{
            (objects: [AnyObject]?, error: NSError?) -> Void in
            if error == nil {
                // The find succeeded.
                 println("Successfully retrieved \(objects!.count) memories.")

                Memory.unpinAllInBackground(self.memories, block: {
                    (success: Bool, error: NSError?) -> Void in

                    // Clear current list
                    self.memories = [Memory]()

                    // Do something with the found objects
                    for memory in objects! {
                        println("current memory: \(memory)")
                        let currentMemory: Memory = memory as! Memory

                        // Save to localDataStore
                        currentMemory.pinInBackground()
                        println("\(currentMemory.memoryTitle) from Parse")

                        // Append to current
                        self.memories.append(currentMemory)
                    }
                })

                // Notify tableView to reload data
                self.memoriesTableView.reloadData()
            } else {

                // Log details of the failure
                println("Error: \(error!) \(error!.userInfo)")
            }

        }
    } 

Answer 1

这个让我忙了几个小时 - Parse-Documentation 提到：

PFObject 的强类型子类必须符合 PFSubclassing 协议，并且必须在调用 [Parse setApplicationId:clientKey:] 之前调用。”

通过在 AppDelegate 中调用 MyParseClass.registerSubclass()，我的问题得到了解决！