使用device.js检测设备并实现不同设备展示不同网页

时间:2021-07-02 17:07:01

现在很多时候会用@media来控制页面在不同分辨率的设备商展示不同效果,但是有些时候想在直接在PC上展示一个做好的页面,在mobile展示另一个页面。这个时候可以借助device.js来检测设备,然后打开不同的页面(device.js 是一个可以用来检测设备,操作系统和方向的js库)。当然这种做法需要一次跳转。

假设有个m.html想用于mobile端展示,pc.html想用于pc端展示。这个时候可以用index.html作为入口,在<head>内引入device.js来检测设备,然后用js来实现跳转。

当设备为Mobile和tablet的时候展示m.html

否则展示pc.html

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>responsive demo</title>
<script src="device.js"></script>
</head> <body style="margin: auto; position: absolute; width:100%; height: 100%"> <script>
var isMobile = device.mobile(),
isTable = device.tablet(); if(isMobile || isTable){
window.open("m.html","_self");
}
else{
window.open("pc.html","_self");
}
</script>
</body>
</html>
其中device.js代码如下 (function() {
var previousDevice, _addClass, _doc_element, _find, _handleOrientation, _hasClass, _orientation_event, _removeClass, _supports_orientation, _user_agent; previousDevice = window.device; window.device = {}; _doc_element = window.document.documentElement; _user_agent = window.navigator.userAgent.toLowerCase(); device.ios = function() {
return device.iphone() || device.ipod() || device.ipad();
}; device.iphone = function() {
return _find('iphone');
}; device.ipod = function() {
return _find('ipod');
}; device.ipad = function() {
return _find('ipad');
}; device.android = function() {
return _find('android');
}; device.androidPhone = function() {
return device.android() && _find('mobile');
}; device.androidTablet = function() {
return device.android() && !_find('mobile');
}; device.blackberry = function() {
return _find('blackberry') || _find('bb10') || _find('rim');
}; device.blackberryPhone = function() {
return device.blackberry() && !_find('tablet');
}; device.blackberryTablet = function() {
return device.blackberry() && _find('tablet');
}; device.windows = function() {
return _find('windows');
}; device.windowsPhone = function() {
return device.windows() && _find('phone');
}; device.windowsTablet = function() {
return device.windows() && _find('touch');
}; device.fxos = function() {
return (_find('(mobile;') || _find('(tablet;')) && _find('; rv:');
}; device.fxosPhone = function() {
return device.fxos() && _find('mobile');
}; device.fxosTablet = function() {
return device.fxos() && _find('tablet');
}; device.meego = function() {
return _find('meego');
}; device.mobile = function() {
return device.androidPhone() || device.iphone() || device.ipod() || device.windowsPhone() || device.blackberryPhone() || device.fxosPhone() || device.meego();
}; device.tablet = function() {
return device.ipad() || device.androidTablet() || device.blackberryTablet() || device.windowsTablet() || device.fxosTablet();
}; device.portrait = function() {
return Math.abs(window.orientation) !== 90;
}; device.landscape = function() {
return Math.abs(window.orientation) === 90;
}; device.noConflict = function() {
window.device = previousDevice;
return this;
}; _find = function(needle) {
return _user_agent.indexOf(needle) !== -1;
}; _hasClass = function(class_name) {
var regex;
regex = new RegExp(class_name, 'i');
return _doc_element.className.match(regex);
}; _addClass = function(class_name) {
if (!_hasClass(class_name)) {
return _doc_element.className += " " + class_name;
}
}; _removeClass = function(class_name) {
if (_hasClass(class_name)) {
return _doc_element.className = _doc_element.className.replace(class_name, "");
}
}; if (device.ios()) {
if (device.ipad()) {
_addClass("ios ipad tablet");
} else if (device.iphone()) {
_addClass("ios iphone mobile");
} else if (device.ipod()) {
_addClass("ios ipod mobile");
}
} else if (device.android()) {
if (device.androidTablet()) {
_addClass("android tablet");
} else {
_addClass("android mobile");
}
} else if (device.blackberry()) {
if (device.blackberryTablet()) {
_addClass("blackberry tablet");
} else {
_addClass("blackberry mobile");
}
} else if (device.windows()) {
if (device.windowsTablet()) {
_addClass("windows tablet");
} else if (device.windowsPhone()) {
_addClass("windows mobile");
} else {
_addClass("desktop");
}
} else if (device.fxos()) {
if (device.fxosTablet()) {
_addClass("fxos tablet");
} else {
_addClass("fxos mobile");
}
} else if (device.meego()) {
_addClass("meego mobile");
} else {
_addClass("desktop");
} _handleOrientation = function() {
if (device.landscape()) {
_removeClass("portrait");
return _addClass("landscape");
} else {
_removeClass("landscape");
return _addClass("portrait");
}
}; _supports_orientation = "onorientationchange" in window; _orientation_event = _supports_orientation ? "orientationchange" : "resize"; if (window.addEventListener) {
window.addEventListener(_orientation_event, _handleOrientation, false);
} else if (window.attachEvent) {
window.attachEvent(_orientation_event, _handleOrientation);
} else {
window[_orientation_event] = _handleOrientation;
} _handleOrientation(); }).call(this);

当然,也可以用device.js来逐个检测设备。

javascript方法如下。

Device JavaScript Method
Mobile device.mobile()
Tablet device.tablet()
iOS device.ios()
iPad device.ipad()
iPhone device.iphone()
iPod device.ipod()
Android device.android()
Android Phone device.androidPhone()
Android Tablet device.androidTablet()
BlackBerry device.blackberry()
BlackBerry Phone device.blackberryPhone()
BlackBerry Tablet device.blackberryTablet()
Windows device.windows()
Windows Phone device.windowsPhone()
Windows Tablet device.windowsTablet()
Firefox OS device.fxos()
Firefox OS Phone device.fxosPhone()
Firefox OS Tablet device.fxosTablet()
MeeGo device.meego()

比如可以用如下代码来检测设备是否为IOS设备

var isIPhone = device.iphone(),
isIPad = device.ipad(); var isIOS = isIPhone || isIPad; if(isIOS){
alert(
"is this iOS?"+isIOS
);
}

或者可以用来控制当为mobile或者tablet的时候加载m.css, PC的时候加载pc.css

if(isMobile | isTable){
document.write( ' <link rel="stylesheet" href="m.css">');
}
else{
document.write('<link rel="stylesheet" href="pc.css">');
}