消息不显示在JSQMessagesViewController（swift）

-1

我想在swift中使用JSQMessagesViewController构建一个聊天应用程序。不幸的是，消息不会出现在屏幕上。唯一可见的是输入栏。消息不显示在JSQMessagesViewController（swift）

我跟着本教程中的说明：https://www.raywenderlich.com/122148/firebase-tutorial-real-time-chat除了我没有演示程序STRAT，但用我自己的应用为出发点。因此，我不使用故事板或导航控制器。

这是我chatController：

import Foundation 
import UIKit 
import Foundation 
import JSQMessagesViewController 

class chatController: JSQMessagesViewController { 

var messages = [JSQMessage]() 
var outgoingBubbleImageView: JSQMessagesBubbleImage! 
var incomingBubbleImageView: JSQMessagesBubbleImage! 

private func setupBubbles() { 
    let factory = JSQMessagesBubbleImageFactory() 
    outgoingBubbleImageView = factory.outgoingMessagesBubbleImageWithColor(UIColor.jsq_messageBubbleBlueColor()) 
    incomingBubbleImageView = factory.incomingMessagesBubbleImageWithColor(UIColor.jsq_messageBubbleLightGrayColor()) 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 
    title = "Sprout" 
    setupBubbles() 
    collectionView!.collectionViewLayout.incomingAvatarViewSize = CGSizeZero 
    collectionView!.collectionViewLayout.outgoingAvatarViewSize = CGSizeZero 

    print(self.view.frame) 
} 

override func viewDidLayoutSubviews() { 
    self.collectionView.frame = self.view.frame 
    //self.collectionView.setNeedsLayout() 
    //self.collectionView.layoutIfNeeded() 
    print("collectionview frame: \(self.collectionView.frame)") 
    print("view frame: \(self.view.frame)") 
} 

override func viewDidAppear(animated: Bool) { 
    super.viewDidAppear(animated) 

    // messages from someone else 
    addMessage("foo", text: "Hey person!") 
    // messages sent from local sender 
    addMessage(senderId, text: "Yo!") 
    addMessage(senderId, text: "I like turtles!") 
    // animates the receiving of a new message on the view 
    finishReceivingMessage() 
} 

override func viewDidDisappear(animated: Bool) { 
    super.viewDidDisappear(animated) 
} 

override func collectionView(collectionView: JSQMessagesCollectionView!, messageBubbleImageDataForItemAtIndexPath indexPath: NSIndexPath!) -> JSQMessageBubbleImageDataSource! { 
    let message = messages[indexPath.item] // 1 
    if message.senderId == senderId { // 2 
     return outgoingBubbleImageView 
    } else { // 3 
     return incomingBubbleImageView 
    } 
} 

override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell{ 
    let cell = super.collectionView(collectionView, cellForItemAtIndexPath: indexPath) as! JSQMessagesCollectionViewCell 

    let message = messages[indexPath.item] 

    if message.senderId == senderId { 
     cell.textView!.textColor = UIColor.whiteColor() 
    } else { 
     cell.textView!.textColor = UIColor.blackColor() 
    } 

    return cell 
} 

override func didPressSendButton(button: UIButton!, withMessageText text: String!, senderId: String!, senderDisplayName: String!, date: NSDate!) { 

    self.addMessage(senderId, text: text); 
    finishSendingMessage() 
} 

func addMessage(id: String, text: String) { 
    print("add message: \(text)") 
    let message = JSQMessage(senderId: id, displayName: "", text: text) 
    messages.append(message) 
} 
}

这我显示从调用我的RootViewController的这段代码：

let userID = "abc123" 
let userName = "randomUserName" 
let chatVc = chatController() 
chatVc.senderId = userID 
chatVc.senderDisplayName = userName 
self.presentViewController(chatVc, animated: true, completion: nil)

我试图清理没有成功的项目。有人可以帮我显示消息泡沫吗？感谢您的帮助！亲切的问候，亚历

来源

2016-09-16 Alexander

你用'indexPath.row'而不是'indexPath.item'试过了吗？ – Zico

谢谢，我刚刚做到了。但它没有改变任何东西。 – Alexander

好吧，其实我不知道那个库，这是我知道的唯一可能导致你的问题的东西。 – Zico

所以我现在修好了，我错过了两个功能：

override func collectionView(collectionView: JSQMessagesCollectionView!, 
messageDataForItemAtIndexPath indexPath: NSIndexPath!) -> JSQMessageData! { 
    return messages[indexPath.item] 
} 

override func collectionView(collectionView: UICollectionView, 
numberOfItemsInSection section: Int) -> Int { 
    return messages.count 
}

，当我在介绍之后我一定是监督他们。在@Zico的帮助下，我找到了错误并修复了它。

来源

2016-09-16 13:18:41 Alexander

消息不显示在JSQMessagesViewController（swift）

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