最近工作重点在基于nodejs前端开发环境中，前端框架挑选不在少数，移动端框架选用了Framework7之后在其中学习了不少先进理念，今天分享一下F7当中的设备监听插件提取及应用在jquery中。本人采用grunt开发环境编译js和css，所以grunt环境的配置编译不作介绍，自行爬教程。
插件主要作用是在html或者body中增加样式选择器，生效之后效果如下：
<body class="pixel-ratio-3 retina ios ios-8 ios-8-0 ios-gt-7 ios-gt-6">
...
</body>
再通过样式去控件各种设备需要的UI
在F7的项目目录中找到/src/js/proto-device.js文件，只需将其$声明改掉即可兼容jquery或者bootstrap。
jQuery插件
移除其中的$符声明，转换成jquery插件方式表现，代码如下：
(function($){
$.fn.useragt = function(options){
return this.each(function(){
var device = {};
var ua = navigator.userAgent;
var android = ua.match(/(Android);?[\s\/]+([\d.]+)?/);
var ipad = ua.match(/(iPad).*OS\s([\d_]+)/);
var ipod = ua.match(/(iPod)(.*OS\s([\d_]+))?/);
var iphone = !ipad && ua.match(/(iPhone\sOS)\s([\d_]+)/);
device.ios = device.android = device.iphone = device.ipad = device.androidChrome = false;
// Android
if (android) {
device.os = 'android';
device.osVersion = android[2];
device.android = true;
device.androidChrome = ua.toLowerCase().indexOf('chrome') >= 0;
}
if (ipad || iphone || ipod) {
device.os = 'ios';
device.ios = true;
}
// iOS
if (iphone && !ipod) {
device.osVersion = iphone[2].replace(/_/g, '.');
device.iphone = true;
}
if (ipad) {
device.osVersion = ipad[2].replace(/_/g, '.');
device.ipad = true;
}
if (ipod) {
device.osVersion = ipod[3] ? ipod[3].replace(/_/g, '.') : null;
device.iphone = true;
}
// iOS 8+ changed UA
if (device.ios && device.osVersion && ua.indexOf('Version/') >= 0) {
if (device.osVersion.split('.')[0] === '10') {
device.osVersion = ua.toLowerCase().split('version/')[1].split(' ')[0];
}
}
// Webview
device.webView = (iphone || ipad || ipod) && ua.match(/.*AppleWebKit(?!.*Safari)/i);
// Minimal UI
if (device.os && device.os === 'ios') {
var osVersionArr = device.osVersion.split('.');
device.minimalUi = !device.webView &&
(ipod || iphone) &&
(osVersionArr[0] * 1 === 7 ? osVersionArr[1] * 1 >= 1 : osVersionArr[0] * 1 > 7) &&
$('meta[name="viewport"]').length > 0 && $('meta[name="viewport"]').attr('content').indexOf('minimal-ui') >= 0;
}
// Classes
var classNames = [];
// Pixel Ratio
device.pixelRatio = window.devicePixelRatio || 1;
classNames.push('pixel-ratio-' + Math.floor(device.pixelRatio));
if (device.pixelRatio >= 2) {
classNames.push('retina');
}
// OS classes
if (device.os) {
classNames.push(device.os, device.os + '-' + device.osVersion.split('.')[0], device.os + '-' + device.osVersion.replace(/\./g, '-'));
if (device.os === 'ios') {
var major = parseInt(device.osVersion.split('.')[0], 10);
for (var i = major - 1; i >= 6; i--) {
classNames.push('ios-gt-' + i);
}
}
}
// Add html classes
if (classNames.length > 0) $(this).addClass(classNames.join(' '));
// Export object
return device;
});
};
})(jQuery);在页面中使用方法，也可以换成$("html")：
$(function(){
$("body").useragt();
});Bootstrap
Bootstrap主要是编译合并，所以修改如下即可（默认是来标识样式选择器）：
+function ($) {
'use strict';
var device = {};
var ua = navigator.userAgent;
var android = ua.match(/(Android);?[\s\/]+([\d.]+)?/);
var ipad = ua.match(/(iPad).*OS\s([\d_]+)/);
var ipod = ua.match(/(iPod)(.*OS\s([\d_]+))?/);
var iphone = !ipad && ua.match(/(iPhone\sOS)\s([\d_]+)/);
device.ios = device.android = device.iphone = device.ipad = device.androidChrome = false;
// Android
if (android) {
device.os = 'android';
device.osVersion = android[2];
device.android = true;
device.androidChrome = ua.toLowerCase().indexOf('chrome') >= 0;
}
if (ipad || iphone || ipod) {
device.os = 'ios';
device.ios = true;
}
// iOS
if (iphone && !ipod) {
device.osVersion = iphone[2].replace(/_/g, '.');
device.iphone = true;
}
if (ipad) {
device.osVersion = ipad[2].replace(/_/g, '.');
device.ipad = true;
}
if (ipod) {
device.osVersion = ipod[3] ? ipod[3].replace(/_/g, '.') : null;
device.iphone = true;
}
// iOS 8+ changed UA
if (device.ios && device.osVersion && ua.indexOf('Version/') >= 0) {
if (device.osVersion.split('.')[0] === '10') {
device.osVersion = ua.toLowerCase().split('version/')[1].split(' ')[0];
}
}
// Webview
device.webView = (iphone || ipad || ipod) && ua.match(/.*AppleWebKit(?!.*Safari)/i);
// Minimal UI
if (device.os && device.os === 'ios') {
var osVersionArr = device.osVersion.split('.');
device.minimalUi = !device.webView &&
(ipod || iphone) &&
(osVersionArr[0] * 1 === 7 ? osVersionArr[1] * 1 >= 1 : osVersionArr[0] * 1 > 7) &&
$('meta[name="viewport"]').length > 0 && $('meta[name="viewport"]').attr('content').indexOf('minimal-ui') >= 0;
}
// Classes
var classNames = [];
// Pixel Ratio
device.pixelRatio = window.devicePixelRatio || 1;
classNames.push('pixel-ratio-' + Math.floor(device.pixelRatio));
if (device.pixelRatio >= 2) {
classNames.push('retina');
}
// OS classes
if (device.os) {
classNames.push(device.os, device.os + '-' + device.osVersion.split('.')[0], device.os + '-' + device.osVersion.replace(/\./g, '-'));
if (device.os === 'ios') {
var major = parseInt(device.osVersion.split('.')[0], 10);
for (var i = major - 1; i >= 6; i--) {
classNames.push('ios-gt-' + i);
}
}
}
// Add html classes
if (classNames.length > 0) $('html').addClass(classNames.join(' ')); //样式选择器可以设置为body
// Export object
return device;
}(jQuery);
