ios - InputToolbar 发送按钮不起作用

Question

我正在使用 JSQMessagesViewController 和 Firebase 在我的应用程序中实现聊天功能。我的 ChatViewController 中的一切都运行良好。但现在我已将 ChatViewController 移动到父 View Controller 内的容器 View 中，现在“发送”按钮在键盘展开时不起作用。

换句话说，为了发送聊天消息，我必须在本身位于 UITabBarController 中的父 View Controller 上调用 view.endEditing(true)，然后发送按钮才会起作用.但是只要展开键盘，发送按钮就没有反应。下面是我的 ChatViewController 代码...

import Foundation
import UIKit
import FirebaseDatabase
import JSQMessagesViewController


final class ChatViewController: JSQMessagesViewController {

    var outgoingBubbleImageView: JSQMessagesBubbleImage!
    var incomingBubbleImageView: JSQMessagesBubbleImage!
    var fireRootRef: FIRDatabaseReference!
    var chatMessages = [JSQMessage]()
    var messagesRefHandle: UInt!
    var chatChannelId: String!


    override func viewDidLoad(){
        super.viewDidLoad()
        self.inputToolbar.contentView.textView.backgroundColor = UIColor.clear
        inputToolbar.alpha = 0.7
        ...
    }


    override func viewWillAppear(_ animated: Bool){
        super.viewWillAppear(animated)
    }

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


    func setupView(){
     ...
    }    

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

    func removeChatObserver(){
       ...
    }

    private func setupMessageBubbles() {
       ...
    }



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

    override func collectionView(_ collectionView: JSQMessagesCollectionView!, messageBubbleImageDataForItemAt indexPath: IndexPath!) -> JSQMessageBubbleImageDataSource! {
        let message = chatMessages[indexPath.item]
        if message.senderId == senderId {
            return outgoingBubbleImageView
        } else {
            return incomingBubbleImageView
        }
    }


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


        let message = chatMessages[indexPath.item]

        if message.senderId == senderId {
            cell.textView!.textColor = UIColor.white
        } else {
            cell.textView!.textColor = UIColor.black
        }

        return cell
    }

    override func collectionView(_ collectionView: JSQMessagesCollectionView!, layout collectionViewLayout: JSQMessagesCollectionViewFlowLayout!, heightForMessageBubbleTopLabelAt indexPath: IndexPath!) -> CGFloat {
        let message = chatMessages[indexPath.item]
        if message.senderId == self.senderId {
            return 0
        }

        if indexPath.item > 0 {
            let previousMessage = chatMessages[indexPath.item - 1]
            if previousMessage.senderId == message.senderId {
                return 0
            }
        }

        return kJSQMessagesCollectionViewCellLabelHeightDefault
    }



    override func collectionView(_ collectionView: JSQMessagesCollectionView!, attributedTextForMessageBubbleTopLabelAt indexPath: IndexPath!) -> NSAttributedString! {

        let message = chatMessages[indexPath.item]

        switch message.senderId {
        case senderId:
            return nil
        default:
            guard let senderDisplayName = message.senderDisplayName else {
            assertionFailure()
            return nil
        }
        return NSAttributedString(string: senderDisplayName)

        }
    }





    //no avatar images
    override func collectionView(_ collectionView: JSQMessagesCollectionView!, avatarImageDataForItemAt indexPath: IndexPath!) -> JSQMessageAvatarImageDataSource! {
        return nil
    }


    override func didPressSend(_ button: UIButton!, withMessageText text: String!, senderId: String!, senderDisplayName: String!, date: Date!) {
        print("DID PRESS SEND")
        let fireMessagesRef =     fireRootRef.child("messages").child(chatChannelId)
        let itemRef = fireMessagesRef.childByAutoId()
        let messageItem = [
            "text": text,
            K.MessageKeys.senderIdKey: senderId,
            "displayName": senderDisplayName,
        ]
        itemRef.setValue(messageItem)

        JSQSystemSoundPlayer.jsq_playMessageSentSound()

        finishSendingMessage()
    }




    override func didPressAccessoryButton(_ sender: UIButton!) {
        //
    }


    private func observeMessages() {
        ...
    }


    func addMessage(id: String, text: String, name: String) {
        ...
    }


}

我想修复发送按钮，以便用户可以在键盘展开时点击发送。有趣的是，为了关闭键盘，我必须在父 View Controller 上调用 view.endEditing(true) 而不是在 subview 本身上。这让我觉得我需要在父 View 上配置按钮操作，但是我没有成功。感谢您的帮助

Answer 1

我猜是 jsq Collection View 覆盖了输入 View ，所以你按下的是 Collection View ，而不是发送按钮。在JSQMessagesViewController中的-(void)jsq_didReceiveKeyboardWillChangeFrameNotification:(NSNotification *)notification打断点，检查是否有CGRectGetHeight(keyboardEndFrame)和insets .bottom 用于设置 Collection View 底部是足够的空间来显示容器中的输入 View 。一个问题是 jsq Controller 使用自动布局来调整 subview ， Collection View 与其 topLayoutGuide 和 bottomLayoutGuide 对齐，这是 View Controller 的东西，当你放置一个 View Controller 时在另一个 View Controller 中，这可能会导致混淆。

以iPhone 6(s)/7 plus为例，keyboard height是271，controller中的inputtoolbar是44高度，所以总高度是315。所以CGRectGetHeight(keyboardEndFrame) + insets.bottom应该是315。在那一行打断点，检查总和是否是315，如果不是，说明计算错误。

解决方案更新如果确实是上面提到的原因，试试这个解决问题

self.additionalContentInset = UIEdgeInsets(top: 0, left: 0, bottom: 44, right: 0)

这将为 Collection View 添加底部插图。在 viewDidLoad

之后添加