Question

我有一个代码可以根据一天中的时间每小时更改背景颜色。现在我正在尝试替换图像源，但似乎不起作用，Code也基于计算机时区，但我想仅基于西班牙巴塞罗那市。

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有效吗？提前谢谢！

Answer 1

将.attr更改为.prop：

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

另一种选择是在css类中定义背景图像，然后只需切换类。

Answer 2

根据时间改变背景这是非常有创意的想法。但是，您是否将所有{{1}}属性设置为相同的图片？

如何根据一天中的小时替换图像

2 个答案: