我如何通过Ajax调用内的一个变量，它是一个内循环（JavaScript的）？ [英] How do I pass a variable inside of an ajax call which is inside of a for loop (javascript)?

问题描述

使用一个API，我需要的第一个响应的一个与一起以服务了新的一页，第二反应。我现在面临的问题是，我的变量$ x被始终设置为任何的最后＃处于环路，即103在此特定情况。这是我的code：

Working with an api and I need to one of the first responses alongside with the second response in order to serve up a new page. The problem I'm facing is that my variable $x is always set to whatever the last # is in the loop, ie 103 in this specific case. Here is my code:

$.ajax({
dataType: 'text',
type: 'post',
url: 'getAllMessages.php',
success: function(responseData) {
    var newString = responseData;
    var newerString = newString.substring(0, newString.length - 1);
    $newObject = jQuery.parseJSON(newerString);
    //console.log($newObject);
    for($x = 0; $x < $newObject.messages.length; $x++){
        $.ajax({
            data: {clientFolderId: $newObject.messages[$x].clientFolderId, messageId: $newObject.messages[$x].messageId},
            dataType: 'text',
            type: 'post',
            url: 'testapi.php',
            success: function(responseData2){
                //alert($x);
                var newString2 = responseData2;
                var newerString2 = newString2.substring(0, newString2.length - 1);
                $newObject2 = jQuery.parseJSON(newerString2);
                if($newObject2.statistics.delivered > 1000){
                    console.log($newObject.messages[$x]);
                    console.log($newObject2);
                }
            },
            error: function(responseData2){
                alert('failure in testapi.php');
            }
        });
    }
},
error: function(responseData) {
    alert('failure in getAllMessages.php');
}

}）;

推荐答案

我的直觉说嵌套在另一个功能范围的Ajax调用（修正感谢马特）将解决意外的行为。我被烧毁，这已经<一个href="http://stackoverflow.com/questions/10095371/object-creation-in-loop-broken-unrolled-works">Object创造循环破裂;展开工程

My intuition says nesting the Ajax call inside another functional scope (correction thanks to Matt) will resolve the unexpected behavior. I got burned by this already Object creation in loop broken; unrolled works

另外这里，例如＃5： http://www.javascriptkit.com/javatutors/closures2的.shtml

Also here, example #5: http://www.javascriptkit.com/javatutors/closures2.shtml

继工程师给出的模式，

for($x = 0; $x < $newObject.messages.length; $x++){

   (function($x) {

    $.ajax({
        data: {clientFolderId: $newObject.messages[$x].clientFolderId, messageId: $newObject.messages[$x].messageId},
        dataType: 'text',
        type: 'post',
        url: 'testapi.php',
        success: function(responseData2){
            alert($x);
            var newString2 = responseData2;
            var newerString2 = newString2.substring(0, newString2.length - 1);
            $newObject2 = jQuery.parseJSON(newerString2);
            if($newObject2.statistics.delivered > 1000){
                console.log($newObject.messages[1]);
                console.log($newObject2);
            }
        },
        error: function(responseData2){
            alert('failure in testapi.php');
        }
    });

   })($x);
}

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