关于屏幕尺寸CSS媒体查询(CSS media queries for screen sizes)

我目前正在设计这将是多种屏幕尺寸兼容的布局。 屏幕尺寸我设计为如下：

屏幕尺寸：

1. 640×480
2. 800×600
3. 1024×768
4. 1280×1024（和更大）的

那我在与正在创建CSS3媒体查询，以便当窗口的宽度得到这些宽度的一个我的布局更改的麻烦事。 下面是我目前使用的媒体查询的一个例子，但它不是为我工作，所以我不知道，如果有人可以帮助我解决这个问题。

<link rel="stylesheet" type="text/css" media="screen and (max-width: 700px)" href="css/devices/screen/layout-modify1.css">
<link rel="stylesheet" type="text/css" media="screen and (min-width: 701px) and (max-width: 900px)" href="css/devices/screen/layout-modify2.css">
<link rel="stylesheet" type="text/css" media="screen and (max-width: 901px)" href="css/devices/screen/layout-modify3.css">

我试图用一套新的媒体查询去，但他们仍然没有为我工作。 可能有人请帮忙解释一下，我错了洞。 你们几个已经尝试过解释，但我没有得到它。 新媒体查询显示如下：

<link rel="stylesheet" type="text/css" media="screen and (max-width: 640px)" href="css/devices/screen/layout-modify1.css">

    <link rel="stylesheet" type="text/css" media="screen and (max-width: 800px)" href="css/devices/screen/layout-modify2.css">

    <link rel="stylesheet" type="text/css" media="screen and (max-width: 1024px)" href="css/devices/screen/layout-modify3.css">

    <link rel="stylesheet" type="text/css" media="screen and (max-width: 1280px)" href="css/devices/screen/layout-modify4.css">

Answer 1:

除非你有更多的样式表比，你搞砸了你的破发点：

#1 (max-width: 700px)
#2 (min-width: 701px) and (max-width: 900px)
#3 (max-width: 901px)

第三媒体查询大概意思是min-width: 901px 。 眼下，它重叠＃1和＃2，只有靠自己来控制页面布局的时候，屏幕正好是901px宽。

编辑更新的问题：

(max-width: 640px)
(max-width: 800px)
(max-width: 1024px)
(max-width: 1280px)

媒体查询是不喜欢捕捉或if / else语句。 如果任何一个条件匹配，那么它会将所有的款式可供各媒体查询它匹配。 如果只指定一个min-width为所有媒体的查询，这可能是部分或全部媒体查询的匹配。 在你的情况，这是640轮像素宽的比赛你的媒体查询的所有4个设备，因此所有的样式表被加载。 你最有可能寻找这就是：

(max-width: 640px)
(min-width: 641px) and (max-width: 800px)
(min-width: 801px) and (max-width: 1024px)
(min-width: 1025px)

现在有没有重叠。 如果设备的宽度处于规定的宽度之间的样式将只适用。

Answer 2:

把它全部在一个文档中，并使用此：

/* Smartphones (portrait and landscape) ----------- */
@media only screen 
and (min-device-width : 320px) 
and (max-device-width : 480px) {
  /* Styles */
}

/* Smartphones (landscape) ----------- */
@media only screen 
and (min-width : 321px) {
  /* Styles */
}

/* Smartphones (portrait) ----------- */
@media only screen 
and (max-width : 320px) {
  /* Styles */
}

/* iPads (portrait and landscape) ----------- */
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) {
  /* Styles */
}

/* iPads (landscape) ----------- */
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) 
and (orientation : landscape) {
  /* Styles */
}

/* iPads (portrait) ----------- */
@media only screen 
and (min-device-width : 768px) 
and (max-device-width : 1024px) 
and (orientation : portrait) {
  /* Styles */
}

/* Desktops and laptops ----------- */
@media only screen 
and (min-width : 1224px) {
  /* Styles */
}

/* Large screens ----------- */
@media only screen 
and (min-width : 1824px) {
  /* Styles */
}

/* iPhone 4 - 5s ----------- */
@media
only screen and (-webkit-min-device-pixel-ratio : 1.5),
only screen and (min-device-pixel-ratio : 1.5) {
  /* Styles */
}

/* iPhone 6 ----------- */
@media
only screen and (max-device-width: 667px) 
only screen and (-webkit-device-pixel-ratio: 2) {
  /* Styles */
}

/* iPhone 6+ ----------- */
@media
only screen and (min-device-width : 414px) 
only screen and (-webkit-device-pixel-ratio: 3) {
  /*** You've spent way too much on a phone ***/
}

/* Samsung Galaxy S7 Edge ----------- */
@media only screen
and (-webkit-min-device-pixel-ratio: 3)
and (min-resolution: 192dpi)and max-width:640px) {
  background-image: url('https://i.ytimg.com/vi/zhBxfNm3rJE/maxresdefault.jpg');
}

来源： http://css-tricks.com/snippets/css/media-queries-for-standard-devices/

在这一点上，我肯定会考虑使用em而不是像素值。 欲了解更多信息，请检查这个帖子： https://zellwk.com/blog/media-query-units/ 。

Answer 3:

对于所有的智能手机和大屏幕使用媒体查询的格式

/* Smartphones (portrait and landscape) ----------- */

@media only screen and (min-device-width : 320px) and (max-device-width : 480px) {
/* Styles */
}

/* Smartphones (landscape) ----------- */

@media only screen and (min-width : 321px) {
/* Styles */
}



/* Smartphones (portrait) ----------- */

@media only screen and (max-width : 320px) {
/* Styles */
}

/* iPads (portrait and landscape) ----------- */

@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) {
/* Styles */
}

/* iPads (landscape) ----------- */

@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : landscape) {
/* Styles */
}

/* iPads (portrait) ----------- */

@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : portrait) {
/* Styles */
}

/**********
iPad 3
**********/

@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : landscape) and (-webkit-min-device-pixel-ratio : 2) {
/* Styles */
}

@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : portrait) and (-webkit-min-device-pixel-ratio : 2) {
/* Styles */
}

/* Desktops and laptops ----------- */

@media only screen  and (min-width : 1224px) {
/* Styles */
}

/* Large screens ----------- */
@media only screen  and (min-width : 1824px) {
/* Styles */
}

/* iPhone 4 ----------- */

@media only screen and (min-device-width : 320px) and (max-device-width : 480px) and (orientation : landscape) and (-webkit-min-device-pixel-ratio : 2) {
/* Styles */
}

@media only screen and (min-device-width : 320px) and (max-device-width : 480px) and (orientation : portrait) and (-webkit-min-device-pixel-ratio : 2) {
/* Styles */
}

/* iPhone 5 ----------- */

@media only screen and (min-device-width: 320px) and (max-device-height: 568px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

@media only screen and (min-device-width: 320px) and (max-device-height: 568px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

/* iPhone 6 ----------- */

@media only screen and (min-device-width: 375px) and (max-device-height: 667px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

@media only screen and (min-device-width: 375px) and (max-device-height: 667px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

/* iPhone 6+ ----------- */

@media only screen and (min-device-width: 414px) and (max-device-height: 736px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

@media only screen and (min-device-width: 414px) and (max-device-height: 736px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

/* Samsung Galaxy S3 ----------- */

@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

/* Samsung Galaxy S4 ----------- */
@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 3){
/* Styles */
}

@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 3){
/* Styles */
}

/* Samsung Galaxy S5 ----------- */

@media only screen and (min-device-width: 360px) and (max-device-height: 640px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 3){
/* Styles */
}

@media only screen and (min-device-width: 360px) and (max-device-height: 640px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 3){
/* Styles */
}

文章来源: CSS media queries for screen sizes