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判断用户当前是什么设备,甚至可以侦测出手机型号乃至系统版本。此代码来自SUI Mobile源码,我只是搬运工,需要借助zepto.js
SUI Mobile官方提供的zepto.js(CDN),懒人必备
1 | <script type='text/javascript' src='//g.alicdn.com/sj/lib/zepto/zepto.min.js' charset='utf-8'></script> |
源码如下:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | $(function(){ (function ($) { "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; }
// Check for status bar and fullscreen app mode var windowWidth = $(window).width(); var windowHeight = $(window).height(); device.statusBar = false; if (device.webView && (windowWidth * windowHeight === screen.width * screen.height)) { device.statusBar = true; } else { device.statusBar = false; }
// 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); } }
} // Status bar classes if (device.statusBar) { classNames.push('with-statusbar-overlay'); } else { $('html').removeClass('with-statusbar-overlay'); }
// Add html classes if (classNames.length > 0) $('html').addClass(classNames.join(' '));
// keng.. device.isWeixin = /MicroMessenger/i.test(ua);
$.device = device; })(Zepto); |
$.device提供了一些基本的设备侦测信息可供使用。举例如下
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | console.log($.device) // -------- { android: true androidChrome: false ios: false ipad: false iphone: false isWeixin: false os: "android" osVersion: "4.4.1" pixelRatio: 3 statusBar: false webView: null } |
同时提供$.compareVersion工具用以方便的进行版本号比较:
1 2 3 4 5 6 7 | // arg1 > arg2, return 1; arg1 == arg2, return 0; arg1 < arg2, return -1 $.compareVersion('8.0', '7.1.1') // return 1 $.compareVersion('4.2', $.device.osVersion) // return -1 $.compareVersion('5.0', '5.0') // return 0 |
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