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,但由于某种原因,当我现在运行该应用程序时,它在 for in loop
中崩溃了。尝试转换时 [AnyObject]
按照我的习惯Memory
类。
日志和报错如下:
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 中检索 8 个正确的内存,并且当前的内存是正确的......它只是不会转换它。
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)")
}
}
}
最佳答案
这个让我忙了几个小时 - Parse-Documentation 提到:
Strongly-typed subclasses of PFObject must conform to the PFSubclassing protocol and must call before [Parse setApplicationId:clientKey:] is called."
通过在 AppDelegate 中调用 MyParseClass.registerSubclass() 我解决了我的问题!
关于swift - PFObject 无法转换为自定义子类,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29643612/