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

因为有许多不同的屏幕尺寸总是在变化,最有可能总是在变化,最好的方法是根据你的设计来设置断点和媒体查询。

要做到这一点,最简单的方法是抓取你完成的桌面设计,并在浏览器中打开它。慢慢缩小屏幕,使其更窄。观察设计什么时候开始“断裂”,或者看起来可怕和局促。此时需要一个带有媒体查询的断点。

通常为台式机、平板电脑和手机创建三组媒体查询。但是,如果你的设计在这三个方面都很好,为什么要麻烦地添加三个不同的不必要的媒体查询呢?根据需要来做!

这不仅仅是关于分辨率,你还需要找到设备的DPR: whatismyscreenresolution “设备像素比(DPR)是设备制造商提供的一个数字,用于HiDPI(每英寸高点数)或Retina(苹果的商标)显示器。”

媒体查询示例:(最小分辨率:3.0dppx)

用于常见设备断点的媒体查询

/* 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 */
}

这不是像素数的问题,而是屏幕上字符的实际大小(以毫米或英寸为单位)的问题,这取决于像素密度。 因此,“min-width:”和“max-width:”是无用的。 关于这个问题的完整解释如下: 设备像素比到底是什么?

“@media”查询会考虑像素数和设备像素比,从而产生“虚拟分辨率”,这是你在设计页面时必须考虑的问题:如果你的字体固定宽度为10px,“虚拟水平分辨率”为300 px,那么一行就需要30个字符。

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。