问题描述
我想使用 jquery 检查窗口大小，并根据不同的分辨率更改背景图像.所以我想以某种方式在更多情况下使用switch"语句，但我只是不知道这会是什么样子.这是我想要的基本结构，但有更多选择:
i would like to check for the window size with jquery and based on the different resolutions i would like to change the background image. So i was thinking to somehow use the "switch" statement for more cases, but i just don't know how this would look like. This is the basic structure i want but with more options:
if ((screen.width>=1024) && (screen.height>=768)) {
//do something
}
else {
//do something else
}
感谢您的帮助.
推荐答案
switch 语句不会让你做诸如检查特定值之间的数字之类的事情，它也不会让你检查在多个变量上，要么...
The switch statement won't let you do stuff like checking for numbers between certain values, and it won't let you check on multiple variables, either...
所以对于这个特定的场景，我认为最合适的实际上只是一个 if-elseif 语句的列表，就像你已经在做的那样.
So for this particular scenario, I think the best fit is actually just a list of if-elseif statements, like you're already on your way to do.
在 switch 中进行范围检查"真的很冗长:
To do "range checks" in switch is really verbose:
switch(windowWidth) {
case 1:
case 2:
case 3:
case 4:
case 5:
//Do something if value is less than or equal to 5
break;
case 6:
case 7:
case 8:
case 9:
case 10:
//Do something if value is higher than 5 AND less than or equal to 10
break;
...
...
}
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