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
$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
其他回答
如果你想瞄准一个设备，那么只需要写min-device-width。例如:
为iPhone
@media only screen and (min-device-width: 480px){}
为平板电脑
@media only screen and (min-device-width: 768px){}
这里有一些不错的文章:
如何使你的网站适合苹果iPad CSS3媒体查询
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。
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。
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
特别小的设备~手机(< 768px) 小设备~平板电脑(>= 768px) 中型设备~台式机(>= 992px) 大型设备~桌面 (> = 1200 px)
