我正在尝试构建一个社交网站，为了让帖子继续更新，我设置了20秒的间隔时间，以便刷新页面并显示新的评论和/或帖子。
我现在的问题是，当用户尝试在我的表单中输入注释时，页面会在整个时间间隔内运行，一旦达到20秒，页面就会刷新并删除文本输入。
我想设置间隔功能，这样如果没有人在页面中的任何地方输入任何内容大约10秒钟，它就会开始计数。
我无法提供输入ID，因为评论是绑定的，并且没有静态ID供参考。
有没有办法做我刚才描述的事情？
这是我要暂时停止间隔的页面代码：
<?php
session_start();
if(!isset($_SESSION['login_user'])){ // check whether a session is set or not
header('Location: registrationPage.php'); // Redirecting To Registration Page
}
include 'connectDB.php';
$FN = $_SESSION['login_user'];
$result = mysqli_query($conn, "SELECT concat(U.firstName,' ',U.lastname) as fullName FROM tblUser U where U.userName='$FN'");
while($row = mysqli_fetch_array($result)){
$UN = $row['fullName'];
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="description" content="Main page">
<meta name="author" content="Sorokina E. and Menaker T.">
<title>Main page</title>
<script type="text/javascript" src="../js/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<href='https://fonts.googleapis.com/css?family=Tangerine' rel='stylesheet' type='text/css'>
<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="../files/connection.json" type="text/jason"></script>
<script src="../files/positions.json" type="text/jason"></script>
<script src="../files/messages.json" type="text/jason"></script>
<link rel="stylesheet" type="text/css" href="../css/mystyle.css">
<script src="../js/typeahead.min.js"></script>
</head>
<body>
<div class="row alignT bg_color7">
<div class="col-sm-1">
<a href="mainPage.php"><img class="img-responsive" src="../images/logo.gif" alt=""></a>
</div>
<div class="col-sm-1">
<?php
if(isset($_SESSION['login_user'])){
echo '<span >Welcome ' . $UN. '! </span>';
}
?>
</div>
<div class="col-sm-1">
<a href="mainPage.php" data-toggle="tooltip" title="Home"><span class="glyphicon glyphicon-home"></span></a>
</div>
<div class="col-sm-1">
<a href="profilePage.php" data-toggle="tooltip" title="My profile"><span class="glyphicon glyphicon-user"></span></a>
</div>
<div class="col-sm-1 " data-toggle="tooltip" title="My connections" >
<button id="NL" class="Tbutton " type="button">
<span class="glyphicon glyphicon-globe " style="vertical-align:middle; " ></span>
</button>
<div id="NC" class="notificationContainer">
<div id="NT" class="notificationTitle">My friends:</div>
<div id="NB" class="notificationsBody forConnection">
<?php include ('selectAllFriends.php');?></div>
<div id="NF" class="notificationFooter"><a href="#">See All</a></div>
</div>
</div>
<div class="col-sm-2 ">
<span > <input id="search" name="typehead" class="typeahead" data-provide="typeahead" placeholder="Search people" ></input></span>
</div>
<div class="col-sm-1 mm">
<span><input type="button" onclick="location.href = 'allUsersPage.php';" class="btn btn-info" value="All people" ></span>
</div>
<div class="col-sm-1 " data-toggle="tooltip" title="My messages" >
<button id="NL1" class="Tbutton " type="button">
<span class="glyphicon glyphicon-envelope" style="vertical-align:middle; " ></span>
</button>
<div id="NC1" class="notificationContainer">
<div id="NT1" class="notificationTitle">My Messages:</div>
<div id="NB1" class="notificationsBody forMessages">
<?php include ('selectAllMessages.php');?></div>
<div id="NF1" class="notificationFooter"><a href="#">See All</a></div>
</div>
</div>
<div class="col-sm-2 " data-toggle="tooltip" title="My notifications" >
<button id="NL2" class="Tbutton " type="button">
<span class="glyphicon glyphicon-flag" style="vertical-align:middle; " ></span>
</button>
<div id="NC2" class="notificationContainer">
<div id="NT2" class="notificationTitle">My Notifications:</div>
<div id="NB2" class="notificationsBody forNotifications"></div>
<div id="NF2" class="notificationFooter"><a href="#">See All</a></div>
</div>
</div>
<div class="col-sm-1">
<a href="logout.php" data-toggle="tooltip" title="Log Out"> <span class="glyphicon glyphicon-log-out"></span></a>
</div>
</div>
<div class="row">
<p class="alignW"><input class=" col-sm-5" type="text" name="mind" id="textField9" placeholder="Share your mind">
<span class=" col-sm-1"></span> <input type="button" id = "btn_submit" class="btn btn-info col-sm-1" value="Add post" ></p>
</div>
<div class="row" id="middle">
<div class="col-sm-8" id="left">
<?php include ('selectAllPosts.php'); ?>
</div>
<div class="col-sm-4" id="right">
<?php include ('select5Positions.php'); ?>
</div>
</div>
<!--Footer-->
<footer class="container-fluid text-center">
<p class="glyphicon glyphicon-copyright-mark"> Created by ... </p>
</footer>
<script>
$(document).ready(function(){
var timer = null;
function autoRefresh_div()
{
$('#left').load("selectAllPosts.php");// a function which will load data from other file after x seconds
}
$(document.body).keydown(function(event){
clearTimeout(timer);
timer = setTimeout(setInterval(function(){ autoRefresh_div() }, 20000), 5000);
});
$("#btn_submit").click(function(){
var userName='<?php echo $FN; ?>';
var content = $('#textField9').val();
var postData = '&uname='+userName+'&content='+content;
$.ajax({
url : "insertPost.php",
type: "POST",
data : postData,
success: function(data,status, xhr){
if(data==="You have successfully posted!"){
$('#textField9').val('');
}
if(data==="ERROR"){
$('#textField9').val('');
}
}
});
});
$('#search').typeahead( {
name:'typehead',
remote: 'selectAllUsers.php?query=%QUERY'
});
//search for all users and go to their pages
$('#search').on('typeahead:selected', function(evt, item){
window.location.href = "userPage.php?fullName="+item.value;
});
$.getJSON("../files/notifications.json",function(result){
$.each(result, function (index, value) {
$(".forNotifications").append("<div class=\"divStyle1\">" +value.Notification + "</div>");
});
});
$("#NL").click(function(){
$("#NC2").hide();
$("#NC1").hide();
$("#NC").fadeToggle(300);
return false;
});
$("#NL1").click(function(){
$("#NC").hide();
$("#NC2").hide();
$("#NC1").fadeToggle(300);
return false;
});
$("#NL2").click(function(){
$("#NC").hide();
$("#NC1").hide();
$("#NC2").fadeToggle(300);
return false;
});
$('#myButton').click(function (){
$(this).hide();
}
);
});
</script>
</body>
</html>
谢谢。
汤姆
答案 0 :(得分：0)
通过制作AJAX请求来检索新数据甚至使用Websockets（这是最有效的），有多种方法可以做到这一点。但是，解决问题的最简单方法是在页面加载时通过JS创建一个计时器。
<!-- Element -->
<input type="text" data-ui="post"/>
<!-- Script -->
<script>
$(document).ready(function(){
var timer = null;
function startTimer() {
timer = setInterval(function() {
window.location.reload();
}, 1000);
}
// Stop timer by clearing with interval when
// the user focuses on the element
$('[data-ui]').on('focus', function() {
clearInterval(timer);
});
// Start the timer once the user has blurred away from
// the element
$('[data-ui]').on('blur', function() {
startTimer();
});
// Start the timer as the page has finished loading
startTimer();
})
</script>
一旦用户聚焦了附有[data-ui]属性标记的元素，基本上就会停止窗口location.reload计时器。另一种方法是使用LocalStorage保存输入内容，并在页面重新加载后将内容重新插入输入框。
如果你需要一个jquERY'less版本，请告诉我。