ios - didFinishReceivingResourceWithName 未被调用

Question

我正在制作的应用程序上通过 MC 发送视频，正确调用了 didStartReceivingResourceWithName。与该回调关联的 NSProgress 对象达到 101.0%，然后 didFinishReceivingResourceWithName 永远不会被调用。你有什么想法？这是每个代码。

func session(session: MCSession, didStartReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, withProgress progress: NSProgress) {
    print("Did start receiving resource")
    dispatch_async(dispatch_get_main_queue()){
        self.progressTimer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: "progressManager", userInfo: nil, repeats: true)
        self.progress = progress
    }
}
func session(session: MCSession, didFinishReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, atURL localURL: NSURL, withError error: NSError?) {
    dispatch_async(dispatch_get_main_queue()){
        self.status.text = "Recieved!"
    }
    self.progressTimer.invalidate()
    let destinationPath  =
    NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent("movie.mov")
    let fileManager: NSFileManager = NSFileManager.defaultManager()
    do{
        try fileManager.moveItemAtURL(localURL, toURL: destinationPath)
    }
    catch let error as NSError {
        print(error)
    }
    print("Did finish receiving resource")
}

Answer 1

我在使用本地 URL 调用 sendResource 到我使用 AVAssetWriter 创建的视频文件时遇到了这个问题。事实证明，在 AVAssetWriter 完成编写视频之前，我正在对视频文件调用 sendResource。在我修改代码以在 .finishWriting 的完成处理程序中调用 sendResource 后，一切都按预期进行。