我想知道,为什么我在使用 ajax 上传图像时页面会刷新,我试图调试问题,但没有找到,
这是控制器功能,
public function uploadImage() {
if(isset($_FILES['header_image'])) {
$config['upload_path'] = 'public/images/global/';
$config['allowed_types'] = 'gif|jpg|png';
$config['file_name'] = 'b_'.random_string('alnum', 5);
$this->upload->initialize($config);
if($this->upload->do_upload('header_image')) {
echo json_encode(array('status'=>"1", 'image_url'=>$this->upload->file_name));
} else {
$upload_error = array('error' => $this->upload->display_errors());
echo json_encode(array('status'=>"0",'upload_error'=>strip_tags($upload_error['error'])));
}
exit;
}
$this->template->render();
}
虽然我的视图 uploadImage.php 看起来像,
$(document).ready(function() {
$('#header_image').on('change', function(){
$("#frm_global").ajaxForm({
success: function(data) {
res = $.parseJSON(data);
if(res.status == 1){
var html = "<img src='<?=base_url();?>path/"+res.image_url+"' class='preview' width='100' height='100' />";
html+= "<input type='hidden' id='image_url' name='image_url' value='"+res.image_url+"' >";
$("#preview").html(html);
$("#frm_global").ajaxFormUnbind();
}
if(res.status == 0){
$("#frm_global").ajaxFormUnbind();
}
}
}).submit();
});
});
<form name="frm_global" id="frm_global" enctype="multipart/form-data">
<div id="preview" style="float:left">
</div>
<div style="float:left">
<div style="margin-top:25px">
<input type="file" name="header_image" id="header_image"/>
<input style="margin-left:100px" onclick="" type="image" id="upload_header" src="any path" />
</div>
</div>
</form>