AWSスワイプクラスの設定行でスレッド1が発生する：EXC_BAD_INSTRUCTION

Question

ユーザーがAWS Lexチャットボットと通信できるようにするアプリケーションを構築していますが、今のところ問題はボタンをタップしてボットと会話を開始するときですクラッシュや私にスレッド1与えます：この行のEXC_BAD_INSTRUCTIONエラー：

let configuration = AWSServiceConfiguration(region: botRegion!, credentialsProvider: AWSIdentityManager.default().credentialsProvider)

のXcodeは、任意の重要な部分を強調しないように私は本当に、それはこのように動作するように引き起こしているものを知っていただきたいと思いますコード。

以下は、私のコードが興味のある人のために全体的にどのように見えるかです。

import Foundation 
import UIKit 
import Photos 
import JSQMessagesViewController 
import AWSLex 
import AWSMobileHubHelper 

let ClientSenderId = "Client" 
let ServerSenderId = "Server" 

class JeevesChatViewController: JSQMessagesViewController, JSQMessagesComposerTextViewPasteDelegate { 

// The name of the bot. 
var botName: String? 

// The bot region 
var botRegion: AWSRegionType? 

// The bot alias 
var botAlias: String? 

// The messages communicated between the client and the server 
var messages: [JSQMessage]? 

// The interaction kit client 
var interactionKit: AWSLexInteractionKit? 

// The session attributes 
var sessionAttributes: [AnyHashable: Any]? 

// Contents of outgoing image 
var outgoingBubbleImageData: JSQMessagesBubbleImage? 

// Contents of incoming image 
var incomingBubbleImageData: JSQMessagesBubbleImage? 

// Used to store task completion source of iteraction kit 
var textModeSwitchingCompletion: AWSTaskCompletionSource<NSString>? 

// The client image 
var clientImage: JSQMessagesAvatarImage? 

// The bot image 
var serverImage: JSQMessagesAvatarImage? 

override func viewDidLoad() { 
    super.viewDidLoad() 

    // Make the initial setup for the bot. 
    // Error occurs here - fatal error: unexpectedly found nil while unwrapping an Optional value 
    let configuration = AWSServiceConfiguration(region: botRegion!, credentialsProvider: AWSIdentityManager.default().credentialsProvider) 

    // Setup interaction kit configuration 
    let botConfig = AWSLexInteractionKitConfig.defaultInteractionKitConfig(withBotName:botName!, botAlias: botAlias!) 

    // Disable automatic voice playback 
    botConfig.autoPlayback = false 

    // Register the interaction kit client 
    AWSLexInteractionKit.register(with: configuration!, interactionKitConfiguration: botConfig, forKey: botName!) 

    // Fetch and set the interaction kit client 
    self.interactionKit = AWSLexInteractionKit.init(forKey: botName!) 

    // Set the interaction kit delegate 
    // Remove 'as? AWSLexInteractionDelegate' statement later 
    self.interactionKit?.interactionDelegate = self 

    // Setup JSQMessagesViewController configuration 
    self.showLoadEarlierMessagesHeader = false 

    // Initialise the avatars for client and server here. 


    // Setup the default keyboard type. 
    self.inputToolbar.contentView?.textView?.keyboardType = UIKeyboardType.default 

    // Initialise the messages list 
    self.messages = [JSQMessage]() 

    // Set the colours for messages bubbles 
    let bubbleFactory = JSQMessagesBubbleImageFactory() 
    self.outgoingBubbleImageData = bubbleFactory?.outgoingMessagesBubbleImage(with: UIColor.jsq_messageBubbleGreen()) 
    self.incomingBubbleImageData = bubbleFactory?.incomingMessagesBubbleImage(with: UIColor.jsq_messageBubbleBlue()) 

    self.inputToolbar.contentView?.leftBarButtonItem = nil 

    self.senderDisplayName = "User" 

    self.senderId = ClientSenderId 
} 

// MARK: - JSQMessagesViewController delegate methods 

override func didPressSend(_ button: UIButton!, withMessageText text: String!, senderId: String!, senderDisplayName: String!, date: Date!) { 
    let message = JSQMessage(senderId: senderId, senderDisplayName: senderDisplayName, date: date, text: text) 
    self.messages?.append(message!) 

    if let textModeSwitchingCompletion = textModeSwitchingCompletion { 
     textModeSwitchingCompletion.set(result: text as NSString) 
     self.textModeSwitchingCompletion = nil 
    } 
    else { 
     self.interactionKit?.text(inTextOut: text) 
    } 
    self.finishSendingMessage(animated: true) 
} 

override func collectionView(_ collectionView: JSQMessagesCollectionView, messageDataForItemAt indexPath: IndexPath) -> JSQMessageData { 

    return self.messages![indexPath.item] 
} 

override func collectionView(_ collectionView: JSQMessagesCollectionView, didDeleteMessageAt indexPath: IndexPath) { 
    // Nothing happens here 
} 

override func collectionView(_ collectionView: JSQMessagesCollectionView, messageBubbleImageDataForItemAt indexPath: IndexPath) -> JSQMessageBubbleImageDataSource { 

    let message = self.messages![indexPath.item] 
    if (message.senderId == self.senderId) { 
     return self.outgoingBubbleImageData! 
    } 
    return self.incomingBubbleImageData! 
} 

override func collectionView(_ collectionView: JSQMessagesCollectionView, avatarImageDataForItemAt indexPath: IndexPath) -> JSQMessageAvatarImageDataSource? { 

    let message = messages![indexPath.item] 
    if message.senderId == ClientSenderId { 
     return self.clientImage 
    } 
    return self.serverImage 
} 

override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { 
    if let messages = messages { 
     return messages.count 
    } 
    return 0 
} 

override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { 

    let cell = (super.collectionView(collectionView, cellForItemAt: indexPath) as! JSQMessagesCollectionViewCell) 
    let msg = self.messages?[indexPath.item] 
    if !msg!.isMediaMessage { 
     if (msg?.senderId == self.senderId) { 
      cell.textView?.textColor = UIColor.black 
     } 
     else { 
      cell.textView?.textColor = UIColor.white 
     } 
    } 
    return cell 
} 

override func collectionView(_ collectionView: JSQMessagesCollectionView, attributedTextForCellTopLabelAt indexPath: IndexPath) -> NSAttributedString? { 
    if indexPath.item % 3 == 0 { 
     let message = self.messages?[indexPath.item] 
     return JSQMessagesTimestampFormatter.shared().attributedTimestamp(for: message!.date) 
    } 
    return nil 
} 

override func collectionView(_ collectionView: JSQMessagesCollectionView, attributedTextForMessageBubbleTopLabelAt indexPath: IndexPath) -> NSAttributedString? { 
    let message = self.messages?[indexPath.item] 

    // iOS 7 sender name labels 
    if (message?.senderId == self.senderId) { 
     return nil 
    } 

    if indexPath.item - 1 > 0 { 
     let previousMessage = self.messages?[indexPath.item - 1] 
     if (previousMessage?.senderId == message?.senderId) { 
      return nil 
     } 
    } 

    // Do not specify attributes to use the default values. 
    return NSAttributedString(string: message!.senderDisplayName) 
} 

override func collectionView(_ collectionView: JSQMessagesCollectionView, attributedTextForCellBottomLabelAt indexPath: IndexPath) -> NSAttributedString? { 
    return nil 
} 

func composerTextView(_ textView: JSQMessagesComposerTextView, shouldPasteWithSender sender: Any) -> Bool { 
    return true 
} 

} 

// MARK: - Bot Interaction Kit 
extension JeevesChatViewController: AWSLexInteractionDelegate { 

func interactionKit(_ interactionKit: AWSLexInteractionKit, onError error: Error) { 
    print("Error occurred: \(error)") 
} 

func interactionKit(_ interactionKit: AWSLexInteractionKit, switchModeInput: AWSLexSwitchModeInput, completionSource: AWSTaskCompletionSource<AWSLexSwitchModeResponse>?) { 
    self.sessionAttributes = switchModeInput.sessionAttributes 
    DispatchQueue.main.async(execute: { 
     let message: JSQMessage 

     // Handle a successful transaction 
     if (switchModeInput.dialogState == AWSLexDialogState.readyForFulfillment) { 
      // Currently just displaying the slots return on ready for fulfillment 
      if let slots = switchModeInput.slots { 
       message = JSQMessage(senderId: ServerSenderId, senderDisplayName: "", date: Date(), text: "Slots:\n\(slots)") 
       self.messages?.append(message) 
       self.finishSendingMessage(animated: true) 
      } 
     } else { 
       message = JSQMessage(senderId: ServerSenderId, senderDisplayName: "", date: Date(), text: switchModeInput.outputText!) 
       self.messages?.append(message) 
       self.finishSendingMessage(animated: true) 
      } 
    }) 
    // This can be expanded to take input from the user. 
    let switchModeResponse = AWSLexSwitchModeResponse() 
    switchModeResponse.interactionMode = AWSLexInteractionMode.text 
    switchModeResponse.sessionAttributes = switchModeInput.sessionAttributes 
    completionSource?.set(result: switchModeResponse) 

} 

func interactionKitContinue(withText interactionKit: AWSLexInteractionKit, completionSource: AWSTaskCompletionSource<NSString>) { 
    textModeSwitchingCompletion = completionSource 
} 
} 

Answer 1

credentialsProviderを正しく設定していません。 AWSIdentityManagerが呼ばれるように初期化されていませんでした：

let configuration = AWSServiceConfiguration(region: botRegion!, credentialsProvider: AWSIdentityManager.default().credentialsProvider) 

あなたがS3バケットのためにAWSを使用している場合、あなたは、その後に自分のラインを変更することができたお忍びので、

let cognitoIdentityPoolId = //"XYZ" 
let cognitoUnauthRoleArn = //"XYZ" 
let cognitoAuthRoleArn = //"XYZ" 
let credentialsProvider = AWSCognitoCredentialsProvider(regionType: #Wherever, identityPoolId: cognitoIdentityPoolId, unauthRoleArn: cognitoUnauthRoleArn, authRoleArn: cognitoAuthRoleArn, identityProviderManager: nil) 

を使用する必要があります。

let configuration = AWSServiceConfiguration(region: botRegion!, credentialsProvider: credentialsProvider)