返回有效JSON时调用Ajax错误回调 - Ajax error callback called when valid JSON is retuned

Ajax error callback called when valid JSON is retuned

在我的js文件中，我调用以下代码:

    $.ajax({
          type: "POST",
          dataType: "application/json",
          url: "php/parseFunctions.php",
          data: {data:queryObj},
          success: function(response) {
             theFunction(response);
          },
          complete:  function(response) {
             theFunction(response);
          },
          error: function(response) {
             theFunction(response); // response = Object {readyState: 4, responseText: "{"found":0}", status: 200, statusText: "OK"
          }
    });

在我的php/parseFunctions.php我有:

$returnResults = array(); 
$returnResults['found']=count($returnResults);  
echo  json_encode($returnResults);
exit;

我希望success回调被调用，response是json对象{"found":"0"}

相反，error回调被调用，response = Object {readyState: 4, responseText: "{"found":"0"}", status: 200, statusText: "OK"}

我读到，如果返回的JSON是无效的，这将发生，但我不觉得它是。

我在这里做错了什么?

我认为问题在于您的dataType属性。您已将其设置为"application/json"。虽然这是一个mimeType值，但$.ajax函数期望下列预定义值之一:xml, json, script, or html，如文档的相关页面所列。

试着让你对$.ajax的调用看起来像这样:

$.ajax({
      type: "POST",
      dataType: "json",
      url: "php/parseFunctions.php",
      data: {data:queryObj},
      success:{...},
      complete:{...},
      error:{...}
});