手機項目經常使用知識小記

1.用pc的思路作mobile，寫死頁面寬度

<meta name="viewport" content="width=640,target-densitydpi=320,user-scalable=no" />

2.改變jquery mobile滑動初始值

$.event.special.swipe.horizontalDistanceThreshold = 10;

3.判斷是否爲微信內置瀏覽器

function is_weixin(){
        var ua = navigator.userAgent.toLowerCase();
        if(ua.match(/MicroMessenger/i)=="micromessenger") {
            return true;
        } else {
            return false;
        }
    }

4.判斷瀏覽器類型

function isBrowser(){
        var Sys={};
        var ua=navigator.userAgent.toLowerCase();
        var s;
        (s=ua.match(/msie ([\d.]+)/))?Sys.ie=s[1]:
        (s=ua.match(/firefox\/([\d.]+)/))?Sys.firefox=s[1]:
        (s=ua.match(/chrome\/([\d.]+)/))?Sys.chrome=s[1]:
        (s=ua.match(/opera.([\d.]+)/))?Sys.opera=s[1]:
        (s=ua.match(/version\/([\d.]+).*safari/))?Sys.safari=s[1]:0;

        if(Sys.safari){
            //
        }
    }

5.ios添加主屏幕圖標

<link rel="apple-touch-icon-precomposed" sizes="144x144" href="http://*/apple-touch-icon-144x144.png">
<link rel="apple-touch-icon-precomposed" sizes="120x120" href="http://*/apple-touch-icon-120x120.png">
<link rel="apple-touch-icon-precomposed" sizes="72x72" href="http://*/apple-touch-icon-72x72.png">
<link rel="apple-touch-icon-precomposed" href="*/apple-touch-icon-57x57.png"><meta name="apple-mobile-web-app-title" content="官網">