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layui弹出层layer的area过大被遮挡

2019-08-26 05:44:24来源：博客园阅读 ()

layui弹出层layer的area过大被遮挡

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" 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>