layui+croppers完成图片剪切上传

不多说直接上代码：

前台代码：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <link href="../layui/layui/css/layui.css" rel="stylesheet" />
    <link href="../layui/cropper/cropper.css" rel="stylesheet" />
</head>
<body>
    <div class="layui-form-item">
        <label class="layui-form-label">头像</label>
        <div class="layui-input-inline">
            <input type="text" name="head" lay-verify="required" id="inputimgurl" placeholder="图片地址" value="123.jpg" class="layui-input">
        </div>
        <div class="layui-input-inline">
            <div class="layui-upload-list" style="margin:0">
                <img src="./微信图片_20190404185124.png" id="srcimgurl" class="layui-upload-img">
            </div>
        </div>
        <div class="layui-input-inline layui-btn-container" style="width: auto;">
            <button class="layui-btn layui-btn-primary" id="editimg">修改图片</button>
        </div>
        <div class="layui-form-mid layui-word-aux">头像的尺寸限定150x150px,大小在50kb以内</div>
    </div>
    <script src="../layui/layui/layui.js"></script>
    <link href="../layui/cropper/cropper.css" rel="stylesheet" />
    <script src="../layui/cropper/croppers.js"></script>
    <script>
        layui.config({
            base: '/layui/cropper/' //layui自定义layui组件目录
        }).use(['form', 'croppers'], function () {
            var $ = layui.jquery
                , form = layui.form
                , croppers = layui.croppers
                , layer = layui.layer;

            //创建一个头像上传组件
            croppers.render({
                elem: '#editimg'
                , saveW: 150     //保存宽度
                , saveH: 150
                , mark: 1 / 1    //选取比例
                , area: '900px'  //弹窗宽度
                , url: "/home/UpLoadImg"  //图片上传接口返回和（layui 的upload 模块）返回的JOSN一样
                , done: function (url) { //上传完毕回调
                    $("#inputimgurl").val(url);
                    $("#srcimgurl").attr('src', url);
                }
            });

        });
    </script>
</body>
</html>

后台代码：

        [HttpPost]
        public ActionResult UpLoadImg()
        {

            //HttpPostedFileBase file = Request.Files["upfile"];
            HttpPostedFileBase file = Request.Files["file"];
            var type = Request.Form["type"];
            var filename = string.Format("{0:yyyyMMddHHmmssfffffff}", DateTime.Now) + ".jpg";
            if (file != null)
            {

                string path = HttpContext.Server.MapPath("/Images/Uploads");
                string filePath = Path.Combine(path, Path.GetFileName(filename));
                //根据需要创建文件夹
                CreateFolderIfNeeded(path);
                //将图片保存到IIS
                file.SaveAs(filePath);
            }

            return Json(new { code=,data= filename });
        }

croppers.js代码：

/*!
 * Cropper v3.0.0
 */

layui.config({
    base: '/static/cropper/' //layui自定义layui组件目录
}).define(['jquery','layer','cropper'],function (exports) {
    var $ = layui.jquery
        ,layer = layui.layer;
    var html = "<link rel=\"stylesheet\" href=\"/static/cropper/cropper.css\">\n" +
        "<div class=\"layui-fluid showImgEdit\" style=\"display: none\">\n" +
        "    <div class=\"layui-form-item\">\n" +
        "        <div class=\"layui-input-inline layui-btn-container\" style=\"width: auto;\">\n" +
        "            <label for=\"cropper_avatarImgUpload\" class=\"layui-btn layui-btn-primary\">\n" +
        "                <i class=\"layui-icon\"></i>选择图片\n" +
        "            </label>\n" +
        "            <input class=\"layui-upload-file\" id=\"cropper_avatarImgUpload\" type=\"file\" value=\"选择图片\" name=\"file\">\n" +
        "        </div>\n" +
        "        <div class=\"layui-form-mid layui-word-aux\">头像的尺寸限定150x150px,大小在50kb以内</div>\n" +
        "    </div>\n" +
        "    <div class=\"layui-row layui-col-space15\">\n" +
        "        <div class=\"layui-col-xs9\">\n" +
        "            <div class=\"readyimg\" style=\"height:450px;background-color: rgb(247, 247, 247);\">\n" +
        "                <img src=\"\" >\n" +
        "            </div>\n" +
        "        </div>\n" +
        "        <div class=\"layui-col-xs3\">\n" +
        "            <div class=\"img-preview\" style=\"width:200px;height:200px;overflow:hidden\">\n" +
        "            </div>\n" +
        "        </div>\n" +
        "    </div>\n" +
        "    <div class=\"layui-row layui-col-space15\">\n" +
        "        <div class=\"layui-col-xs9\">\n" +
        "            <div class=\"layui-row\">\n" +
        "                <div class=\"layui-col-xs6\">\n" +
        "                    <button type=\"button\" class=\"layui-btn layui-icon layui-icon-left\" cropper-event=\"rotate\" data-option=\"-15\" title=\"Rotate -90 degrees\"> 向左旋转</button>\n" +
        "                    <button type=\"button\" class=\"layui-btn layui-icon layui-icon-right\" cropper-event=\"rotate\" data-option=\"15\" title=\"Rotate 90 degrees\"> 向右旋转</button>\n" +
        "                </div>\n" +
        "                <div class=\"layui-col-xs5\" style=\"text-align: right;\">\n" +
        "                    <button type=\"button\" class=\"layui-btn\" title=\"移动\"></button>\n" +
        "                    <button type=\"button\" class=\"layui-btn\" title=\"放大图片\"></button>\n" +
        "                    <button type=\"button\" class=\"layui-btn\" title=\"缩小图片\"></button>\n" +
        "                    <button type=\"button\" class=\"layui-btn layui-icon layui-icon-refresh\" cropper-event=\"reset\" title=\"重置图片\"></button>\n" +
        "                </div>\n" +
        "            </div>\n" +
        "        </div>\n" +
        "        <div class=\"layui-col-xs3\">\n" +
        "            <button class=\"layui-btn layui-btn-fluid\" cropper-event=\"confirmSave\" type=\"button\"> 保存修改</button>\n" +
        "        </div>\n" +
        "    </div>\n" +
        "\n" +
        "</div>";
    var obj = {
        render: function(e){
            $('body').append(html);
            var self = this,
                elem = e.elem,
                saveW = e.saveW,
                saveH = e.saveH,
                mark = e.mark,
                area = e.area,
                url = e.url,
                done = e.done;

            var content = $('.showImgEdit')
                ,image = $(".showImgEdit .readyimg img")
                ,preview = '.showImgEdit .img-preview'
                ,file = $(".showImgEdit input[name='file']")
                , options = {aspectRatio: mark,preview: preview,viewMode:};

            $(elem).on('click',function () {
                layer.open({
                    type:
                    , content: content
                    , area: area
                    , success: function () {
                        image.cropper(options);
                    }
                    , cancel: function (index) {
                        layer.close(index);
                        image.cropper('destroy');
                    }
                });
            });
            $(".layui-btn").on('click',function () {
                var event = $(this).attr("cropper-event");
                //监听确认保存图像
                if(event === 'confirmSave'){
                    image.cropper("getCroppedCanvas",{
                        width: saveW,
                        height: saveH
                    }).toBlob(function(blob){
                        var formData=new FormData();
                        formData.append('file',blob,'head.jpg');
                        $.ajax({
                            method:"post",
                            url: url, //用于文件上传的服务器端请求地址
                            data: formData,
                            processData: false,
                            contentType: false,
                            success:function(result){
                                if(result.code == ){
                                    layer.msg(result.msg,{icon: });
                                    layer.closeAll('page');
                                    return done(result.data.src);
                                }else if(result.code == -){
                                    layer.alert(result.msg,{icon: });
                                }

                            }
                        });
                    });
                    //监听旋转
                }else if(event === 'rotate'){
                    var option = $(this).attr('data-option');
                    image.cropper('rotate', option);
                    //重设图片
                }else if(event === 'reset'){
                    image.cropper('reset');
                }
                //文件选择
                file.change(function () {
                    var r= new FileReader();
                    var f=this.files[];
                    r.readAsDataURL(f);
                    r.onload=function (e) {
                        image.cropper('destroy').attr('src', this.result).cropper(options);
                    };
                });
            });
        }

    };
    exports('croppers', obj);
});

cropper插件可以直接网上下载。

基本剪切上传图片功能完成，还需要修改样式和处理返回值的需要根据自己需要改动下代码。出处x-admin-》第三方插件-》截图