Php Ajax - 一个页面中的多个调用

Question

现在我的代码只加载 1 页 (load.php?cid=1 但我想加载 5-8 (cid=1,cid=2,cid=3,cid=4,cid=5, cid=6,cid=10 ...等)在不同的div中。

我将如何实现它？

$(document).ready(function() {
        function loading_show() {
            $('#loading_Paging').html("<img src='images/loading.gif'/>").fadeIn('fast');
        }

        function loading_hide() {
            $('#loading_Paging').fadeOut 'fast');
        }

        function loadData(page) {
            loading_show();
            $.ajax({
                type: "POST",
                url: "load.php?cid=1",
                data: "page=" + page,
                success: function(msg) {
                    $("#container_Paging").ajaxComplete(function(event, request, settings) {
                        loading_hide();
                        $("#container_Paging").html(msg);
                    });
                }
            });
        }

Answer 1

正如 JimL 提到的，我会给页面上的每个元素一个公共(public)类，给每个元素一个唯一的数据属性，如 data-cid="1"，迭代每个元素以获取 cids并为每个调用 ajax 函数。

我更进一步，使用 Promise 获取所有 Ajax 响应，然后在 Promise 解决时(当所有 Ajax 请求完成时)加载所有数据。

这里是a working example

HTML:

<div id="loading_Paging"></div>
<div class="myElements" data-cid="1"></div>
<div class="myElements" data-cid="2" ></div>
<div class="myElements" data-cid="3" ></div>
<div class="myElements" data-cid="4" ></div>
<div class="myElements" data-cid="5" ></div>
<div class="myElements" data-cid="6" ></div>
<div class="myElements" data-cid="7"></div>
<div class="myElements" data-cid="8" ></div>

jQuery:

$(function() {

    var page = 'some string...'
    loadData(page);

    function loadData(){
        $('#loading_Paging').html("<img src='images/loading.gif'/>").fadeIn('fast');
        // loop through each image element
        // calling the ajax function for each and storing the reponses in a `promise`
        var promises = $('.myElements').map(function(index, element) {
            var cid = '&&cid=' + $(this).data('cid'); // get the cid attribute 
            return $.ajax({
                    type: "POST",
                    url: 'load.php',
                    data: "page=" + page +cid, //add the cid info to the post data
                    success: function(msg) {
                    }
            });
        });
        // once all of the ajax calls have returned, te promise is resolved 
        // and the below function is called 
        $.when.apply($, promises).then(function() {
            // arguments[0][0] is first result
            // arguments[1][0] is second result and so on
            for (var i = 0; i < arguments.length; i++) {
                $('.myElements').eq(i).html( arguments[i][0] );
            }
            $('#loading_Paging').fadeOut('fast');
        });
     }
});

我在示例中使用的 PHP:

<?php
if (isset($_POST['cid']) ){
    // this is just a contrived example
    // in your code youd use the cid to 
    // get whatever data you need for the current div
    echo 'This is returned message '.$_POST['cid'];
}
?>