weui weui-switch 開關取值，設置默認狀態

html

                <div class="weui-cell__ft">
                    <input class="weui-switch" type="checkbox" id="btn-switch">
                </div>

js

var str = $("#btn-switch").is(":checked");

注：選中返回值：true；未選中返回值：false

設置開關狀態

默認開啟

                <div class="weui-cell__ft">
                    <input class="weui-switch" type="checkbox" id="btn-switch" checked="checked">
                </div>

默認關閉

                <div class="weui-cell__ft">
                    <input class="weui-switch" type="checkbox" id="btn-switch"/>
                </div>