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将js代码加入,可以放在footer页脚:
<script type="text/javascript">
//夜间模式
(function(){
if(document.cookie.replace(/(?:(?:^|.*;\s*)night\s*\=\s*([^;]*).*$)|^.*$/, "$1") === ''){
if(new Date().getHours() > 22 || new Date().getHours() < 6){
document.body.classList.add('night');
document.cookie = "night=1;path=/";
console.log('夜间模式开启');
}else{
document.body.classList.remove('night');
document.cookie = "night=0;path=/";
console.log('夜间模式关闭');
}
}else{
var night = document.cookie.replace(/(?:(?:^|.*;\s*)night\s*\=\s*([^;]*).*$)|^.*$/, "$1") || '0';
if(night == '0'){
document.body.classList.remove('night');
}else if(night == '1'){
document.body.classList.add('night');
}
}
})();
//夜间模式切换
function switchNightMode(){
var night = document.cookie.replace(/(?:(?:^|.*;\s*)night\s*\=\s*([^;]*).*$)|^.*$/, "$1") || '0';
if(night == '0'){
document.body.classList.add('night');
document.cookie = "night=1;path=/"
console.log('夜间模式开启');
}else{
document.body.classList.remove('night');
document.cookie = "night=0;path=/"
console.log('夜间模式关闭');
}
}
</script>
其次在header页头的body加入php判断,检测到cookie相关字段直接输出body class为night,防止页面闪烁。
<body class="<?php echo($_COOKIE['night'] == '1' ? 'night' : ''); ?>">
最后,调试CSS,body.night xxx ,xxx是覆盖替换的css样式(比如文字字体夜间模式需要浅灰色,那么找到这个样式,然后修改),body.night img 是把图片降低亮度,有些地方图片如果没有降低亮度,那么也像前面那样加入。
body.night xxx{
background-color: #263238;
color: #aaa;
}
body.night img {
filter: brightness(30%);
}
我的css修改例子(下面),看一下应该就懂了。这里和你的主题不同,复制粘贴也没用,需要自己修改成自己主题需要的。
<style>
body.night, body.night #body, body.night .page_navi a.current {
background-color: #263238!important;
color: #888282!important;
}
body.night #sidebar, body.night .next-page a {
background-color: #263238;
color: #888282;
}
body.night #content .post p a, body.night .floor {
color: #af8f77;
}
body.night .shang {
color: #263238;
}
body.night .shang {
background-color: #ab9a6d;
}
body.night img, body.night .icon_qq, body.night .icon_facebook, body.night .icon_rss, body.night .icon_weixin, body.night .icon_github, body.night .bozhugravatar a, body.night .left-col {
filter: brightness(50%);
}
body.night a, body.night a:link, body.night a:visited {
color: #989292;
}
body.night #comments form textarea, body.night #comments form input {
background-color: #263238;
color: #888282;
}
body.night #content .menufeng {
border-bottom: 1px solid #989292;
}
body.night #footer, body.night #xgwz, body.night #comments {
border-top: 1px solid #989292;
}
body.night #comments form textarea, body.night #comments form input, body.night #shangerweima {
border: 1px solid #989292;
}
body.night #nav .menu ul{
background: #3e4c52;
}
</style>
OK,只要客户端时间是22点到6点之间,就自动切换到夜间模式,你也可以用下面的代码来弄一个按钮在页面上,方便随时切换。
<a href="javascript:switchNightMode()" target="_self">查看效果</a>
注意:添加的按钮优先权高于系统自动切切换,若点击按钮实现了夜间模式切换,则自动切换功能会暂停,直到你清除缓存后才会再次实现自动切换。
[/tip]