如何根据一天中的小时来替换图像

How to replace image based on the hour of the day

本文关键字：小时 替换 图像 何根 一天      更新时间：2023-09-26

我有一个代码，可以根据一天中的时间(小时)更改背景颜色。现在我正试图做同样的替换图像源，但似乎不工作，代码也是基于计算机时区，但我想使其仅基于巴塞罗那市，西班牙。

JAVASCRIPT 

$(document).ready(function(){
var d = new Date();
var n = d.getHours();
//1-2am
if (n > 23 || n < 2) {
 $("img#photo1").attr("src","images/head6.png");
 $('body').css({'background-color':'#2e3348','color':'#FFF'});
 }
//2-3am
else if (n > 24 || n < 3) {
 $("img#photo1").attr("src","images/head6.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//3-4am
else if (n > 1 || n < 4) {
 $("img#photo1").attr("src","images/head6.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//4-5am
else if (n > 2 || n < 5) {
 $("img#photo1").attr("src","images/head6.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//5-6am
else if (n > 3 || n < 6) {
 $("img#photo1").attr("src","images/head6.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//6-7am
else if (n > 4 || n < 7) {
 $("img#photo1").attr("src","images/head6.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//7-8am
else if (n > 5 || n < 8) {
 $("img#photo1").attr("src","images/head6.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//8-9am
else if (n > 6 || n < 9) {
 $("img#photo1").attr("src","images/head4.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//9-10am
else if (n > 7 || n < 10) {
 $("img#photo1").attr("src","images/head4.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//10-11am
else if (n > 8 || n < 11) {
 $("img#photo1").attr("src","images/head4.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//11-12am
else if (n > 9 || n < 12) {
 $("img#photo1").attr("src","images/head4.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//12-1pm
else if (n > 10 || n < 13) {
 $("img#photo1").attr("src","images/head4.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//1-2pm
else if (n > 11 || n < 14) {
 $("img#photo1").attr("src","images/head4.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//2-3pm
else if (n > 12 || n < 15) {
 $("img#photo1").attr("src","images/head4.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//3-4pm
else if (n > 13 || n < 16) {
 $("img#photo1").attr("src","images/head4.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//4-5pm
else if (n > 14 || n < 17) {
 $("img#photo1").attr("src","images/head4.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//5-6pm
else if (n > 15 || n < 18) {
 $("img#photo1").attr("src","images/head4.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//6-7pm 
else if (n > 16 || n < 19) {
 $("img#photo1").attr("src","images/head.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//7-8pm 
else if (n > 17 || n < 20) {
 $("img#photo1").attr("src","images/head1.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//8-9pm 
else if (n > 18 || n < 21) {
 $("img#photo1").attr("src","images/head1.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//9-10pm 
else if (n > 19 || n < 22) {
 $("img#photo1").attr("src","images/head1.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//10-11pm 
else if (n > 20 || n < 23) {
 $("img#photo1").attr("src","images/head1.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
//11-12pm 
else {
 $("img#photo1").attr("src","images/head1.png");
 $('body').css({'background-color':'#5ca0d6','color':'#FFF'});
 }
});

我的HTML是

<img src="" id="photo1" />
有什么建议可以更好地理解它并使其工作吗?提前感谢!

将。attr改为。prop:

 $("img#photo1").prop("src","images/head6.png");

另一个选择是在css类中定义背景图像，然后切换类。

这是一个非常有创意的想法，可以根据时间来改变背景。但是您是否将所有src属性设置为相同的图片?

相关文章：