使用 Codeigniter 和 jQuery 表单插件上传 Ajax 文件

Question

我想使用带有 Codeigniter 的 jQuery 表单插件。当我尝试上传时，页面被重定向（因此 ajax 不起作用）并且没有上传任何内容。

表单所在的视图如下所示：

<form id="upload_form" action="upload/do_upload" method="post" enctype="multipart/form-data">
   <input type="file" name="myfile"><br>
   <input type="submit" value="Upload File to Server">
</form>

<div class="progress">
        <div class="bar"></div >
        <div class="percent">0%</div >
</div>
<div id="status"></div>

<script>
(function() {

var bar = $('.bar');
var percent = $('.percent');
var status = $('#status');

$('#upload_form').ajaxForm({
    beforeSend: function() {
        status.empty();
        var percentVal = '0%';
        bar.width(percentVal)
        percent.html(percentVal);
    },
    uploadProgress: function(event, position, total, percentComplete) {
        var percentVal = percentComplete + '%';
        bar.width(percentVal)
        percent.html(percentVal);
    },
  complete: function(xhr) {
    status.html(xhr.responseText);
  }
}); 

})();   
</script>    
<script type="text/javascript" src="http://localhost/editor/assets/js/jquery-1.7.2.min.js"></script>
<script type="text/javascript" src="http://localhost/editor/assets/js/jquery.form.js"></script>
</body>

上传的控制器取自 Codeigniter 手册：

<?php

class Upload extends CI_Controller {

    function __construct()
    {
        parent::__construct();
        $this->load->helper(array('form', 'url'));
    }

    function do_upload()
    {
        $config['upload_path'] = './userdata/';
        $config['allowed_types'] = 'gif|jpg|png';
        $config['max_size'] = '100';
        $config['max_width']  = '1024';
        $config['max_height']  = '768';

        $this->load->library('upload', $config);

        if ( ! $this->upload->do_upload())
        {
            $error = array('error' => $this->upload->display_errors());

            //$this->load->view('upload_form', $error);   TODO echo error 
        }
        else
        {
            $data = array('upload_data' => $this->upload->data());

            //$this->load->view('upload_success', $data);  TODO echo succes
        }
    }
}
?>

我确定我只是在某个地方犯了一个小错误，有人能看出我哪里出错了吗？提前致谢！

Answer 1

您好像忘记在 DOM 准备好时初始化表单。

$(document).ready(function() { 
        // bind 'myForm' and provide a simple callback function 
        $('#upload_form').ajaxForm(function() { 
            //rest of your code from the post
        }); 
    });