Question

这是一个简单的聊天表

id| fromUserId| toUserId| message

让假数据John（45），Jane（46）和Mary（47）。说约翰同时与简和玛丽聊天。

John（45）开始与Jane（46）进行对话，所以数据看起来像这样：

id| fromUserId| toUserId| message
1 | 45        | 46      | wassup?

在第二种情况下，玛丽（47岁）开始与约翰（45）进行对话

id| fromUserId| toUserId| message
2 | 47        | 45      | wassup?

如何向John显示两个不同的对话？我使用此查询但不起作用：

    <?php
        $chatmsgQ="SELECT * FROM ve_chat c 
       WHERE c.isActive='1' AND c.fromUserId='$loginid_session' 
       OR c.toUserId='$loginid_session'";
    $chatmsgresult=  mysqli_query($db,$chatmsgQ);?>

使用时编辑

      <ul class="dropdown-menu" style="overflow-x: hidden;">
      <?php
      $chatmsgQ="SELECT * FROM ve_chat c WHERE c.isActive='1' AND (c.fromUserId='$loginid_session' OR c.toUserId='$loginid_session') GROUP BY (c.fromUserId='$loginid_session' OR c.toUserId='$loginid_session')";
      $chatresultse=  mysqli_query($db,$chatmsgQ);
      while($chatboxes=  mysqli_fetch_array($chatresultse)){;?>
      <li  style="font-size: small; ">
      <a style='width: 100% !important;' href='' data-toggle='modal' data-target='#chatModal'>
      Chat  with <?=$chatresultuseres['ProfileName'];?> | <?=$rowChat[0];?> Msg (s)
                </a>
                 </li>
            <?php } ;?>
    </ul>

Answer 1

在MySQL查询中使用括号

示例：

import UIKit
import AVFoundation

class ViewController: UIViewController {

    @IBOutlet weak var playSoundSwitch: UISegmentedControl!

    var backgroundMusicPlayer: AVAudioPlayer?

    var player:AVAudioPlayer = AVAudioPlayer()

    @discardableResult func playSound(named soundName: String) -> AVAudioPlayer {


        let audioPath = Bundle.main.path(forResource: soundName, ofType: "wav")
        player = try! AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: audioPath!) as URL)
        player.play()
        return player
    }


    @IBAction func catButtonPressed(_ sender: Any) {

        if playSoundSwitch.selectedSegmentIndex == 0 {
            playSound(named: "catSound")
        }


    }

    @IBAction func dogButtonPressed(_ sender: Any) {
        if playSoundSwitch.selectedSegmentIndex == 0 {
            playSound(named: "dogSound")
        }
    }

    @IBAction func birdButtonPressed(_ sender: Any) {

        if playSoundSwitch.selectedSegmentIndex == 0 {
            playSound(named: "birdSound")
            print("bird sound")
        }
    }

    @IBAction func playBackgroundMusicSwitchChanged(_ sender: Any) {


        if (sender as AnyObject).selectedSegmentIndex == 0 {
            backgroundMusicPlayer = playSound(named: "backgroundSound")
        } else {
            backgroundMusicPlayer?.stop()
            backgroundMusicPlayer = nil
        }
    }

}

Mysql查询为同一用户获取所有不同的消息

1 个答案: