我一直在做一些关于媒体查询的研究，但我仍然不太明白如何针对特定尺寸的设备。
我希望能够瞄准台式机、平板电脑和手机。我知道会有一些差异，但如果有一个通用的系统可以用来针对这些设备就好了。
我找到了一些例子:
# Mobile
only screen and (min-width: 480px)
# Tablet
only screen and (min-width: 768px)
# Desktop
only screen and (min-width: 992px)
# Huge
only screen and (min-width: 1280px)
Or:
# Phone
only screen and (max-width:320px)
# Tablet
only screen and (min-width:321px) and (max-width:768px)
# Desktop
only screen and (min-width:769px)
每个设备的断点应该是什么?
当前回答
该行为在桌面上不会改变。但在平板电脑和手机上，我将导航栏展开以覆盖大的logo图像。注意:使用边缘(顶部和底部)尽可能多的你需要你的标志高度。
对于我的例子，60px的顶部和底部工作完美!
@media (max-width:768px) {
.navbar-toggle {
margin: 60px 0;
}
}
检查这里的导航栏。
其他回答
很简单
/* Mobile Devices */
@media (max-width: 480px) {
foo > bar {
}
}
/* Low resolution Tablets and iPads */
@media (min-width: 481px) and (max-width: 767px) {
foo > bar {
}
}
/* Tablets iPads (Portrait) */
@media (min-width: 768px) and (max-width: 1024px){
foo > bar {
}
}
/* Laptops and Desktops */
@media (min-width: 1025px) and (max-width: 1280px){
foo > bar {
}
}
/* Big boi Monitors */
@media (min-width: 1281px) {
foo > bar {
}
}
现在最常见的是视网膜屏幕设备，换句话说:设备具有高分辨率和非常高的像素密度(但通常小于6英寸物理尺寸)。这就是为什么你需要在CSS上使用视网膜显示专门的媒体查询。这是我能找到的最完整的例子:
@media only screen and (min-width: 320px) {
/* Small screen, non-retina */
}
@media
only screen and (-webkit-min-device-pixel-ratio: 2) and (min-width: 320px),
only screen and ( min--moz-device-pixel-ratio: 2) and (min-width: 320px),
only screen and ( -o-min-device-pixel-ratio: 2/1) and (min-width: 320px),
only screen and ( min-device-pixel-ratio: 2) and (min-width: 320px),
only screen and ( min-resolution: 192dpi) and (min-width: 320px),
only screen and ( min-resolution: 2dppx) and (min-width: 320px) {
/* Small screen, retina, stuff to override above media query */
}
@media only screen and (min-width: 700px) {
/* Medium screen, non-retina */
}
@media
only screen and (-webkit-min-device-pixel-ratio: 2) and (min-width: 700px),
only screen and ( min--moz-device-pixel-ratio: 2) and (min-width: 700px),
only screen and ( -o-min-device-pixel-ratio: 2/1) and (min-width: 700px),
only screen and ( min-device-pixel-ratio: 2) and (min-width: 700px),
only screen and ( min-resolution: 192dpi) and (min-width: 700px),
only screen and ( min-resolution: 2dppx) and (min-width: 700px) {
/* Medium screen, retina, stuff to override above media query */
}
@media only screen and (min-width: 1300px) {
/* Large screen, non-retina */
}
@media
only screen and (-webkit-min-device-pixel-ratio: 2) and (min-width: 1300px),
only screen and ( min--moz-device-pixel-ratio: 2) and (min-width: 1300px),
only screen and ( -o-min-device-pixel-ratio: 2/1) and (min-width: 1300px),
only screen and ( min-device-pixel-ratio: 2) and (min-width: 1300px),
only screen and ( min-resolution: 192dpi) and (min-width: 1300px),
only screen and ( min-resolution: 2dppx) and (min-width: 1300px) {
/* Large screen, retina, stuff to override above media query */
}
来源:CSS-Tricks网站
Extra small devices (phones, up to 480px) Small devices (tablets, 768px and up) Medium devices (big landscape tablets, laptops, and desktops, 992px and up) Large devices (large desktops, 1200px and up) portrait e-readers (Nook/Kindle), smaller tablets - min-width:481px portrait tablets, portrait iPad, landscape e-readers - min-width:641px tablet, landscape iPad, lo-res laptops - min-width:961px HTC One device-width: 360px device-height: 640px -webkit-device-pixel-ratio: 3 Samsung Galaxy S2 device-width: 320px device-height: 534px -webkit-device-pixel-ratio: 1.5 (min--moz-device-pixel-ratio: 1.5), (-o-min-device-pixel-ratio: 3/2), (min-device-pixel-ratio: 1.5 Samsung Galaxy S3 device-width: 320px device-height: 640px -webkit-device-pixel-ratio: 2 (min--moz-device-pixel-ratio: 2), - Older Firefox browsers (prior to Firefox 16) - Samsung Galaxy S4 device-width: 320px device-height: 640px -webkit-device-pixel-ratio: 3 LG Nexus 4 device-width: 384px device-height: 592px -webkit-device-pixel-ratio: 2 Asus Nexus 7 device-width: 601px device-height: 906px -webkit-min-device-pixel-ratio: 1.331) and (-webkit-max-device-pixel-ratio: 1.332) iPad 1 and 2, iPad Mini device-width: 768px device-height: 1024px -webkit-device-pixel-ratio: 1 iPad 3 and 4 device-width: 768px device-height: 1024px -webkit-device-pixel-ratio: 2) iPhone 3G device-width: 320px device-height: 480px -webkit-device-pixel-ratio: 1) iPhone 4 device-width: 320px device-height: 480px -webkit-device-pixel-ratio: 2) iPhone 5 device-width: 320px device-height: 568px -webkit-device-pixel-ratio: 2)
$xs : "extra-small";
$s : "small";
$m : "medium";
$l : "large";
$xl : "extra-large";
@mixin respond($breakpoint) {
@if($breakpoint == $xs) {
@media only screen and (min-width: 320px) and (max-width: 479px) { @content; }
}
@if($breakpoint == $s) {
@media only screen and (min-width: 480px) and (max-width: 767px) { @content; }
}
@if($breakpoint == $m) {
@media only screen and (min-width: 768px) and (max-width: 991px) { @content; }
}
@if($breakpoint == $l) {
@media only screen and (min-width: 992px) and (max-width: 1199px) { @content; }
}
@if($breakpoint == $xl) {
@media only screen and (min-width: 1200px) { @content; }
}
}
你也可以为小于320px的场景添加一个，比如Galaxy fold
在我看来，这些是最好的断点:
@media (min-width:320px) { /* smartphones, portrait iPhone, portrait 480x320 phones (Android) */ }
@media (min-width:480px) { /* smartphones, Android phones, landscape iPhone */ }
@media (min-width:600px) { /* portrait tablets, portrait iPad, e-readers (Nook/Kindle), landscape 800x480 phones (Android) */ }
@media (min-width:801px) { /* tablet, landscape iPad, lo-res laptops ands desktops */ }
@media (min-width:1025px) { /* big landscape tablets, laptops, and desktops */ }
@media (min-width:1281px) { /* hi-res laptops and desktops */ }
编辑:改进工作更好的960网格:
@media (min-width:320px) { /* smartphones, iPhone, portrait 480x320 phones */ }
@media (min-width:481px) { /* portrait e-readers (Nook/Kindle), smaller tablets @ 600 or @ 640 wide. */ }
@media (min-width:641px) { /* portrait tablets, portrait iPad, landscape e-readers, landscape 800x480 or 854x480 phones */ }
@media (min-width:961px) { /* tablet, landscape iPad, lo-res laptops ands desktops */ }
@media (min-width:1025px) { /* big landscape tablets, laptops, and desktops */ }
@media (min-width:1281px) { /* hi-res laptops and desktops */ }
在实践中，许多设计师将像素转换为ems，很大程度上是因为ems提供更好的缩放效果。在标准缩放1em == 16px时，将像素乘以1em/16px得到ems。例如，320px === 20em。
对于这条评论的回应，最小宽度是“移动优先”设计的标准，即你从设计最小的屏幕开始，然后添加不断增加的媒体查询，直至越来越大的屏幕。
无论您是喜欢min-、max-还是它们的组合，都要认识到规则的顺序，记住，如果多个规则匹配同一个元素，后面的规则将覆盖前面的规则。
