解决layui弹出层layer的area过大被遮挡的问题

更新时间：2020-09-14 04:54:01 作者：startmvc

layer弹出窗口在弹出时指定了area，弹出后，如果当前页面（iframe）大小比弹出的窗口小，那

layer弹出窗口在弹出时指定了area，弹出后，如果当前页面（iframe）大小比弹出的窗口小，那么就会出现无法操作弹出窗口的尴尬情况。

如图：

弹出窗口比当前页面大,这时，唯有放大整个页面才能看到完全的弹出窗口，才可以操作。

layui 为我们提供了 layer.style(); 方法来重新跳整窗口的大小 , 然后我们只需要写一个函数,得到当前document的宽度和高度, 判断弹出框是否大于document来调整窗口大小


<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>Title</title>
 <link rel="stylesheet" href="layui/css/layui.css" rel="external nofollow" media="all">
</head>
<body>
<button id="dianji">点击</button>

<form class="layui-form" action="" id="id">
 <div class="layui-form-item">
 <label class="layui-form-label">单行输入框</label>
 <div class="layui-input-block">
 <input type="text" name="title" lay-verify="title" autocomplete="off" placeholder="请输入标题"
 class="layui-input">
 </div>
 </div>
 <div class="layui-form-item">
 <label class="layui-form-label">验证必填项</label>
 <div class="layui-input-block">
 <input type="text" name="username" lay-verify="required" lay-reqtext="用户名是必填项，岂能为空？" placeholder="请输入"
 autocomplete="off" class="layui-input">
 </div>
 </div>

 <div class="layui-form-item">
 <div class="layui-inline">
 <label class="layui-form-label">验证手机</label>
 <div class="layui-input-inline">
 <input type="tel" name="phone" lay-verify="required|phone" autocomplete="off" class="layui-input">
 </div>
 </div>
 <div class="layui-inline">
 <label class="layui-form-label">验证邮箱</label>
 <div class="layui-input-inline">
 <input type="text" name="email" lay-verify="email" autocomplete="off" class="layui-input">
 </div>
 </div>
 </div>
</form>

<script src="layui/layui.all.js"></script>
<script type="text/javascript">
 var layerIndex;
 var layerInitWidth;
 var layerInitHeight;
 var $;
 layui.use(['form', 'jquery'], function () {
 var form = layui.form;
 $ = layui.jquery;
 $("#dianji").click(function () {
 layer.open({
 type: 1,
 area: ['500px', '900px'],
 content: $('#id'), //这里content是一个DOM，注意：最好该元素要存放在body最外层，否则可能被其它的相对元素所影响
 btn: ['按钮一', '按钮二', '按钮三']
 , yes: function (index, layero) {
 //按钮【按钮一】的回调
 }
 , btn2: function (index, layero) {
 //按钮【按钮二】的回调

 //return false 开启该代码可禁止点击该按钮关闭
 }
 , btn3: function (index, layero) {
 //按钮【按钮三】的回调

 //return false 开启该代码可禁止点击该按钮关闭
 }
 , cancel: function () {
 //右上角关闭回调

 //return false 开启该代码可禁止点击该按钮关闭
 },
 success: function (layero, index) {
 //获取当前弹出窗口的索引及初始大小
 layerIndex = index;
 layerInitWidth = $("#layui-layer" + layerIndex).width();
 layerInitHeight = $("#layui-layer" + layerIndex).height();
 resizeLayer(layerIndex, layerInitWidth, layerInitHeight);
 form.render();
 }
 });

 })

 });

 function resizeLayer(layerIndex, layerInitWidth, layerInitHeight) {
 var windowWidth = $(document).width();
 var windowHeight = $(document).height();
 var minWidth = layerInitWidth > windowWidth ? windowWidth : layerInitWidth;
 var minHeight = layerInitHeight > windowHeight ? windowHeight : layerInitHeight;
 console.log("win:", windowWidth, windowHeight);
 console.log("lay:", layerInitWidth, layerInitHeight);
 console.log("min:", minWidth, minHeight);
 layer.style(layerIndex, {
 top: 0,
 width: minWidth,
 height: minHeight
 });
 }
</script>
</body>
</html>

效果图：