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基于 layui,多图片上传后可移动图片位置,根据cropper修改的图片截取(剪裁)上传插件(参考@adminxf单图片)

创建:2019-3-9

文档

实例:
html
<div class="layui-tab layui-tab-card">
<div class="layui-form" style="padding: 20px 0 0 0;">
<div class="layui-form-item">
<label class="layui-form-label">图片上传</label>
<div class="layui-input-inline">
<div class="layui-upload-list layui-icon" id="addZmImg">

</div>
</div>
</div>
<div class="">
<ul id="imgZmList"></ul>
</div>
</div>
</div>
<div id="cropperdiv"></div>
js:
<script>
layui.config({
base: "../../static/js/"
})
layui.use(['form', 'upload'], function () {
var form = layui.form
, $ = layui.jquery
, upload = layui.upload;

//证明多图片上传
upload.render({
elem: '#addZmImg'
, url: '上传路径'
, multiple: true
, before: function (obj) {
//预读本地文件示例,不支持ie8
obj.preview(function (index, file, result) {
$('#imgZmList').append('<li style="position:relative"><img name="imgZmList" src="' + result + '"width="150" height="113"><div class="title_cover" name="imgZmName" onclick="divClick(this)"></div><div class="img_edit layui-icon" onclick="croppers_pic(this)"></div><div class="img_close" onclick="deleteElement(this)">X</div></li>');
form.render();
imgMove("imgZmList");
});
}
, done: function (res) {
//上传完毕
}
});
});
function croppers_pic(obj) {
var src = obj.parentNode.childNodes["0"].src;
layui.use(["croppers"], function () {
var croppers = layui.croppers;
croppers.render({
area: ['900px', '600px'] //弹窗宽度
, imgUrl: src
, url: "/user/upload.asp" //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
//更改图片src
obj.parentNode.childNodes["0"].src = url;
}
});
});
}
</script>
publishImg.js
//图片移动
function imgMove(obj) {
var oUl = document.getElementById(obj);
var aLi = oUl.getElementsByTagName("li");
var disX = 0;
var disY = 0;
var minZindex = 1;
var aPos = [];
var leftbz = 0;
var topbz = 0;
for (var i = 0; i < aLi.length; i++) {
if (leftbz == 5) {
leftbz = 1;
topbz += 1;
var fdiv = (topbz + 1) * 140;
oUl.style.height = fdiv + 'px';
}
else {
leftbz += 1;
}
//var l = aLi[i].offsetLeft;
//var t = aLi[i].offsetTop;
//此处注意,我是按照控件算出来的。尴尬。。。/(ㄒoㄒ)/~~
var l = 170 * (leftbz - 1) + 10;
var t = 130 * topbz;

aLi[i].style.top = t + "px";
aLi[i].style.left = l + "px";
aPos[i] = { left: l, top: t };
aLi[i].index = i;


}
for (var i = 0; i < aLi.length; i++) {
aLi[i].style.position = "absolute";
aLi[i].style.margin = 0;
setDrag(aLi[i]);
}
//拖拽
function setDrag(obj) {
obj.onmouseover = function () {
obj.style.cursor = "move";
}
obj.onmousedown = function (event) {
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft;
obj.style.zIndex = minZindex++;
//当鼠标按下时计算鼠标与拖拽对象的距离
disX = event.clientX + scrollLeft - obj.offsetLeft;
disY = event.clientY + scrollTop - obj.offsetTop;
document.onmousemove = function (event) {
//当鼠标拖动时计算div的位置
var l = event.clientX - disX + scrollLeft;
var t = event.clientY - disY + scrollTop;
obj.style.left = l + "px";
obj.style.top = t + "px";
/*for(var i=0;i<aLi.length;i++){
aLi[i].className = "";
if(obj==aLi[i])continue;//如果是自己则跳过自己不加红色虚线
if(colTest(obj,aLi[i])){
aLi[i].className = "active";
}
}*/
for (var i = 0; i < aLi.length; i++) {
aLi[i].className = "";
}
var oNear = findMin(obj);
if (oNear) {
oNear.className = "active";
}
}
document.onmouseup = function () {
document.onmousemove = null;//当鼠标弹起时移出移动事件
document.onmouseup = null;//移出up事件,清空内存
//检测是否普碰上,在交换位置
var oNear = findMin(obj);
if (oNear) {
oNear.className = "";
oNear.style.zIndex = minZindex++;
obj.style.zIndex = minZindex++;
startMove(oNear, aPos[obj.index]);
startMove(obj, aPos[oNear.index]);
//交换index
oNear.index += obj.index;
obj.index = oNear.index - obj.index;
oNear.index = oNear.index - obj.index;
} else {

startMove(obj, aPos[obj.index]);
}
}
clearInterval(obj.timer);
return false;//低版本出现禁止符号
}
}
//碰撞检测
function colTest(obj1, obj2) {
var t1 = obj1.offsetTop;
var r1 = obj1.offsetWidth + obj1.offsetLeft;
var b1 = obj1.offsetHeight + obj1.offsetTop;
var l1 = obj1.offsetLeft;

var t2 = obj2.offsetTop;
var r2 = obj2.offsetWidth + obj2.offsetLeft;
var b2 = obj2.offsetHeight + obj2.offsetTop;
var l2 = obj2.offsetLeft;

if (t1 > b2 || r1 < l2 || b1 < t2 || l1 > r2) {
return false;
} else {
return true;
}
}
//勾股定理求距离
function getDis(obj1, obj2) {
var a = obj1.offsetLeft - obj2.offsetLeft;
var b = obj1.offsetTop - obj2.offsetTop;
return Math.sqrt(Math.pow(a, 2) + Math.pow(b, 2));
}
//找到距离最近的
function findMin(obj) {
var minDis = 999999999;
var minIndex = -1;
for (var i = 0; i < aLi.length; i++) {
if (obj == aLi[i]) continue;
if (colTest(obj, aLi[i])) {
var dis = getDis(obj, aLi[i]);
if (dis < minDis) {
minDis = dis;
minIndex = i;
}
}
}
if (minIndex == -1) {
return null;
} else {
return aLi[minIndex];
}
}
}
//图片删除
function deleteElement(Obj) {
Obj.parentNode.parentNode.removeChild(Obj.parentNode);
}
//描述
function divClick(obj) {
layer.prompt({ title: '请填新的描述,并确认', formType: 2 }, function (text, index) {
obj.innerHTML = text;
layer.close(index);
});
}

//图片裁剪
layui.config({
base: "../../static/js/"
}).extend({
"croppers": "croppers"
});
function croppers_pic(obj) {
var src = obj.parentNode.childNodes["0"].src;
layui.use(["croppers"], function () {
var croppers = layui.croppers;
croppers.render({
area: ['900px', '600px'] //弹窗宽度
, imgUrl: src
, url: "/user/upload.asp" //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
//更改图片src
obj.parentNode.childNodes["0"].src = url;
}
});
});
}
展示:


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