thinkphp使用ajax单图上传

1.form表单

<div class="layui-form-item">
    <label class="layui-form-label">商品主图</label>
    <div class="layui-input-block">
        <a id="btn-thumb"><img src="/static/index/images/thumb.jpg" id="thumb-preview" style="cursor:pointer;100px; height:100px;"></a>
        <!-- 路径 -->
        <input type="hidden" name="goods_thumb" id="input-thumb" value="">
        <button class="layui-btn layui-btn-danger" lay-filter="demo1" id="cancel" type="button">删除图片</button>
    </div>
</div>

2.ajax代码

<script>
        //主图上传
        layui.use('upload', function(){
            var $ = layui.jquery;
            var upload = layui.upload;
            var uploadInst = upload.render({
                elem:'#btn-thumb',
                url: "{:url('/seller_Goods/upload')}",
                size:2500,
                exts: 'jpg|png|jpeg',
                before: function(obj){
                    obj.preview(function(index,thumb, result){
                        $('#thumb-preview').attr('src',result);
                    });
                },
                done: function(res){
                    console.log(res);
                    if(res.code == 0){
                        return layer.msg(res.message);
                    }
                    $('#input-thumb').val(res.filepath);
                }
            });
        });
</script>

3.控制器

    //通用多图上传接口
    public function upload()
    {
       if($this->request->isPost()){
             $res['code']=1;
             $res['msg'] = '上传成功！';
             $file = $this->request->file('file');
             $info = $file->move('./upload/store_goods/');
             if($info){
                 $res['name'] = $info->getFilename();
                 $res['filepath'] = '/'.str_replace('\','/',$info->getSaveName());
             }else{
                 $res['code'] = 0;
                 $res['msg'] = '上传失败！'.$file->getError();
             }
             return $res;
        }
    }

    //多图删除头像
    public function delimg(){
        $imgurl=input('imgurl');
        $imgurl='./upload/store_goods'. $imgurl;
        $res=unlink($imgurl);
        if($res){
            echo 1; //删除文件成功
        }else{
            echo 2;//删除文件失败
        }
    }