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