本章主要讲解移动端研发用HTML做页面需要做的一些准备，用第二篇文章apicloud默认生产项目做讲解。希望阅读完能够牢记于心，举一反三！
1.4.1 序言
有WEB开发经验的相关技术人员都知道传统的HTML和JS在移动设备上有很多相关的属性在移动端的是不适用的。或者说很多默认属性在移动端看起来更像bug(例如默认允许放大缩小页面)，于是为了使得页面更加接近手机页面我们可以做一下准备。
1.4.2 CSS相关
处理不同平台浏览器的默认样式
下列举出一些常用的例子：
- 清除浏览器默认样式（借鉴CSS Reset，Normalize.css）
- 禁用系统长按菜单（-webkit-touch-callout:none）
- 禁用字体大小自动调整（-webkit-text-size-adjust:none）
- 去掉点击高亮（-webkit-tap-highlight-color:rgba(0, 0, 0, 0)）
- 禁止选择内容（-webkit-user-select:none）
html,body,header,section,footer,div,ul,ol,li,img,a,span,em,del,legend,center,strong,var,fieldset,form,label,dl,dt,dd,cite,input,hr,time,mark,code,figcaption,figure,textarea,h1,h2,h3,h4,h5,h6,p{
margin:0;
border:0;
padding:0;
font-style:normal;
}
html,body {
-webkit-touch-callout:none;
-webkit-text-size-adjust:none;
-webkit-tap-highlight-color:rgba(0, 0, 0, 0);
-webkit-user-select:none;
background-color: #fff;
}
nav,article,aside,details,main,header,footer,section,fieldset,figcaption,figure{
display: block;
}
img,a,button,em,del,strong,var,label,cite,small,time,mark,code,textarea{
display:inline-block;
}
header,section,footer {
position:relative;
}
ol,ul{
list-style:none;
}
input,button,textarea {
border:0;
margin:0;
padding:0;
font-size:1em;
line-height:1em;
/*-webkit-appearance:none;*/
background-color:rgba(0, 0, 0, 0);
}
span{
display:inline-block;
}
a:active, a:hover {
outline: 0;
}
a, a:visited{
text-decoration:none;
}
label, .wordWrap{
word-wrap: break-word;
word-break: break-all;
}
table {
border-collapse: collapse;
border-spacing: 0;
}
td,th {
padding: 0;
}
1.4.3 JS相关
主要介绍的是api.js前端框架 抽离JQ的Zepto.js 如果想提高JS的同学建议通读下面api.js代码 里面有代码规范有很多只得学习的点。已经抽离的非常简单
代码是用来阅读的，偶尔用来执行的。
——不知道谁说的
有几个点是值得思考的：
- JS的主要描述的对象是什么？
- 使用了什么设计模式？
- 命名的规范规则？
- api.js如何实现像JQ一样使用$ (这里是$api)的使用方法?
/*
* APICloud JavaScript Library
* Copyright (c) 2014 apicloud.com
*/
(function(window){
var u = {};
var isAndroid = (/android/gi).test(navigator.appVersion);
var uzStorage = function(){
var ls = window.localStorage;
if(isAndroid){
ls = os.localStorage();
}
return ls;
};
function parseArguments(url, data, fnSuc, dataType) {
if (typeof(data) == 'function') {
dataType = fnSuc;
fnSuc = data;
data = undefined;
}
if (typeof(fnSuc) != 'function') {
dataType = fnSuc;
fnSuc = undefined;
}
return {
url: url,
data: data,
fnSuc: fnSuc,
dataType: dataType
};
}
u.trim = function(str){
if(String.prototype.trim){
return str == null ? "" : String.prototype.trim.call(str);
}else{
return str.replace(/(^\s*)|(\s*$)/g, "");
}
};
u.trimAll = function(str){
return str.replace(/\s*/g,'');
};
u.isElement = function(obj){
return !!(obj && obj.nodeType == 1);
};
u.isArray = function(obj){
if(Array.isArray){
return Array.isArray(obj);
}else{
return obj instanceof Array;
}
};
u.isEmptyObject = function(obj){
if(JSON.stringify(obj) === '{}'){
return true;
}
return false;
};
u.addEvt = function(el, name, fn, useCapture){
if(!u.isElement(el)){
console.warn('$api.addEvt Function need el param, el param must be DOM Element');
return;
}
useCapture = useCapture || false;
if(el.addEventListener) {
el.addEventListener(name, fn, useCapture);
}
};
u.rmEvt = function(el, name, fn, useCapture){
if(!u.isElement(el)){
console.warn('$api.rmEvt Function need el param, el param must be DOM Element');
return;
}
useCapture = useCapture || false;
if (el.removeEventListener) {
el.removeEventListener(name, fn, useCapture);
}
};
u.one = function(el, name, fn, useCapture){
if(!u.isElement(el)){
console.warn('$api.one Function need el param, el param must be DOM Element');
return;
}
useCapture = useCapture || false;
var that = this;
var cb = function(){
fn && fn();
that.rmEvt(el, name, cb, useCapture);
};
that.addEvt(el, name, cb, useCapture);
};
u.dom = function(el, selector){
if(arguments.length === 1 && typeof arguments[0] == 'string'){
if(document.querySelector){
return document.querySelector(arguments[0]);
}
}else if(arguments.length === 2){
if(el.querySelector){
return el.querySelector(selector);
}
}
};
u.domAll = function(el, selector){
if(arguments.length === 1 && typeof arguments[0] == 'string'){
if(document.querySelectorAll){
return document.querySelectorAll(arguments[0]);
}
}else if(arguments.length === 2){
if(el.querySelectorAll){
return el.querySelectorAll(selector);
}
}
};
u.byId = function(id){
return document.getElementById(id);
};
u.first = function(el, selector){
if(arguments.length === 1){
if(!u.isElement(el)){
console.warn('$api.first Function need el param, el param must be DOM Element');
return;
}
return el.children[0];
}
if(arguments.length === 2){
return this.dom(el, selector+':first-child');
}
};
u.last = function(el, selector){
if(arguments.length === 1){
if(!u.isElement(el)){
console.warn('$api.last Function need el param, el param must be DOM Element');
return;
}
var children = el.children;
return children[children.length - 1];
}
if(arguments.length === 2){
return this.dom(el, selector+':last-child');
}
};
u.eq = function(el, index){
return this.dom(el, ':nth-child('+ index +')');
};
u.not = function(el, selector){
return this.domAll(el, ':not('+ selector +')');
};
u.prev = function(el){
if(!u.isElement(el)){
console.warn('$api.prev Function need el param, el param must be DOM Element');
return;
}
var node = el.previousSibling;
if(node.nodeType && node.nodeType === 3){
node = node.previousSibling;
return node;
}
};
u.next = function(el){
if(!u.isElement(el)){
console.warn('$api.next Function need el param, el param must be DOM Element');
return;
}
var node = el.nextSibling;
if(node.nodeType && node.nodeType === 3){
node = node.nextSibling;
return node;
}
};
u.closest = function(el, selector){
if(!u.isElement(el)){
console.warn('$api.closest Function need el param, el param must be DOM Element');
return;
}
var doms, targetDom;
var isSame = function(doms, el){
var i = 0, len = doms.length;
for(i; i<len; i++){
if(doms[i].isEqualNode(el)){
return doms[i];
}
}
return false;
};
var traversal = function(el, selector){
doms = u.domAll(el.parentNode, selector);
targetDom = isSame(doms, el);
while(!targetDom){
el = el.parentNode;
if(el != null && el.nodeType == el.DOCUMENT_NODE){
return false;
}
traversal(el, selector);
}
return targetDom;
};
return traversal(el, selector);
};
u.contains = function(parent,el){
var mark = false;
if(el === parent){
mark = true;
return mark;
}else{
do{
el = el.parentNode;
if(el === parent){
mark = true;
return mark;
}
}while(el === document.body || el === document.documentElement);
return mark;
}
};
u.remove = function(el){
if(el && el.parentNode){
el.parentNode.removeChild(el);
}
};
u.attr = function(el, name, value){
if(!u.isElement(el)){
console.warn('$api.attr Function need el param, el param must be DOM Element');
return;
}
if(arguments.length == 2){
return el.getAttribute(name);
}else if(arguments.length == 3){
el.setAttribute(name, value);
return el;
}
};
u.removeAttr = function(el, name){
if(!u.isElement(el)){
console.warn('$api.removeAttr Function need el param, el param must be DOM Element');
return;
}
if(arguments.length === 2){
el.removeAttribute(name);
}
};
u.hasCls = function(el, cls){
if(!u.isElement(el)){
console.warn('$api.hasCls Function need el param, el param must be DOM Element');
return;
}
if(el.className.indexOf(cls) > -1){
return true;
}else{
return false;
}
};
u.addCls = function(el, cls){
if(!u.isElement(el)){
console.warn('$api.addCls Function need el param, el param must be DOM Element');
return;
}
if('classList' in el){
el.classList.add(cls);
}else{
var preCls = el.className;
var newCls = preCls +' '+ cls;
el.className = newCls;
}
return el;
};
u.removeCls = function(el, cls){
if(!u.isElement(el)){
console.warn('$api.removeCls Function need el param, el param must be DOM Element');
return;
}
if('classList' in el){
el.classList.remove(cls);
}else{
var preCls = el.className;
var newCls = preCls.replace(cls, '');
el.className = newCls;
}
return el;
};
u.toggleCls = function(el, cls){
if(!u.isElement(el)){
console.warn('$api.toggleCls Function need el param, el param must be DOM Element');
return;
}
if('classList' in el){
el.classList.toggle(cls);
}else{
if(u.hasCls(el, cls)){
u.removeCls(el, cls);
}else{
u.addCls(el, cls);
}
}
return el;
};
u.val = function(el, val){
if(!u.isElement(el)){
console.warn('$api.val Function need el param, el param must be DOM Element');
return;
}
if(arguments.length === 1){
switch(el.tagName){
case 'SELECT':
var value = el.options[el.selectedIndex].value;
return value;
break;
case 'INPUT':
return el.value;
break;
case 'TEXTAREA':
return el.value;
break;
}
}
if(arguments.length === 2){
switch(el.tagName){
case 'SELECT':
el.options[el.selectedIndex].value = val;
return el;
break;
case 'INPUT':
el.value = val;
return el;
break;
case 'TEXTAREA':
el.value = val;
return el;
break;
}
}
};
u.prepend = function(el, html){
if(!u.isElement(el)){
console.warn('$api.prepend Function need el param, el param must be DOM Element');
return;
}
el.insertAdjacentHTML('afterbegin', html);
return el;
};
u.append = function(el, html){
if(!u.isElement(el)){
console.warn('$api.append Function need el param, el param must be DOM Element');
return;
}
el.insertAdjacentHTML('beforeend', html);
return el;
};
u.before = function(el, html){
if(!u.isElement(el)){
console.warn('$api.before Function need el param, el param must be DOM Element');
return;
}
el.insertAdjacentHTML('beforebegin', html);
return el;
};
u.after = function(el, html){
if(!u.isElement(el)){
console.warn('$api.after Function need el param, el param must be DOM Element');
return;
}
el.insertAdjacentHTML('afterend', html);
return el;
};
u.html = function(el, html){
if(!u.isElement(el)){
console.warn('$api.html Function need el param, el param must be DOM Element');
return;
}
if(arguments.length === 1){
return el.innerHTML;
}else if(arguments.length === 2){
el.innerHTML = html;
return el;
}
};
u.text = function(el, txt){
if(!u.isElement(el)){
console.warn('$api.text Function need el param, el param must be DOM Element');
return;
}
if(arguments.length === 1){
return el.textContent;
}else if(arguments.length === 2){
el.textContent = txt;
return el;
}
};
u.offset = function(el){
if(!u.isElement(el)){
console.warn('$api.offset Function need el param, el param must be DOM Element');
return;
}
var sl = Math.max(document.documentElement.scrollLeft, document.body.scrollLeft);
var st = Math.max(document.documentElement.scrollTop, document.body.scrollTop);
var rect = el.getBoundingClientRect();
return {
l: rect.left + sl,
t: rect.top + st,
w: el.offsetWidth,
h: el.offsetHeight
};
};
u.css = function(el, css){
if(!u.isElement(el)){
console.warn('$api.css Function need el param, el param must be DOM Element');
return;
}
if(typeof css == 'string' && css.indexOf(':') > 0){
el.style && (el.style.cssText += ';' + css);
}
};
u.cssVal = function(el, prop){
if(!u.isElement(el)){
console.warn('$api.cssVal Function need el param, el param must be DOM Element');
return;
}
if(arguments.length === 2){
var computedStyle = window.getComputedStyle(el, null);
return computedStyle.getPropertyValue(prop);
}
};
u.jsonToStr = function(json){
if(typeof json === 'object'){
return JSON && JSON.stringify(json);
}
};
u.strToJson = function(str){
if(typeof str === 'string'){
return JSON && JSON.parse(str);
}
};
u.setStorage = function(key, value){
if(arguments.length === 2){
var v = value;
if(typeof v == 'object'){
v = JSON.stringify(v);
v = 'obj-'+ v;
}else{
v = 'str-'+ v;
}
var ls = uzStorage();
if(ls){
ls.setItem(key, v);
}
}
};
u.getStorage = function(key){
var ls = uzStorage();
if(ls){
var v = ls.getItem(key);
if(!v){return;}
if(v.indexOf('obj-') === 0){
v = v.slice(4);
return JSON.parse(v);
}else if(v.indexOf('str-') === 0){
return v.slice(4);
}
}
};
u.rmStorage = function(key){
var ls = uzStorage();
if(ls && key){
ls.removeItem(key);
}
};
u.clearStorage = function(){
var ls = uzStorage();
if(ls){
ls.clear();
}
};
/*by king*/
u.fixIos7Bar = function(el){
if(!u.isElement(el)){
console.warn('$api.fixIos7Bar Function need el param, el param must be DOM Element');
return;
}
var strDM = api.systemType;
if (strDM == 'ios') {
var strSV = api.systemVersion;
var numSV = parseInt(strSV,10);
var fullScreen = api.fullScreen;
var iOS7StatusBarAppearance = api.iOS7StatusBarAppearance;
if (numSV >= 7 && !fullScreen && iOS7StatusBarAppearance) {
el.style.paddingTop = '20px';
}
}
};
u.fixStatusBar = function(el){
if(!u.isElement(el)){
console.warn('$api.fixStatusBar Function need el param, el param must be DOM Element');
return;
}
var sysType = api.systemType;
if(sysType == 'ios'){
u.fixIos7Bar(el);
}else if(sysType == 'android'){
var ver = api.systemVersion;
ver = parseFloat(ver);
if(ver >= 4.4){
el.style.paddingTop = '25px';
}
}
};
u.toast = function(title, text, time){
var opts = {};
var show = function(opts, time){
api.showProgress(opts);
setTimeout(function(){
api.hideProgress();
},time);
};
if(arguments.length === 1){
var time = time || 500;
if(typeof title === 'number'){
time = title;
}else{
opts.title = title+'';
}
show(opts, time);
}else if(arguments.length === 2){
var time = time || 500;
var text = text;
if(typeof text === "number"){
var tmp = text;
time = tmp;
text = null;
}
if(title){
opts.title = title;
}
if(text){
opts.text = text;
}
show(opts, time);
}
if(title){
opts.title = title;
}
if(text){
opts.text = text;
}
time = time || 500;
show(opts, time);
};
u.post = function(/*url,data,fnSuc,dataType*/){
var argsToJson = parseArguments.apply(null, arguments);
var json = {};
var fnSuc = argsToJson.fnSuc;
argsToJson.url && (json.url = argsToJson.url);
argsToJson.data && (json.data = argsToJson.data);
if(argsToJson.dataType){
var type = argsToJson.dataType.toLowerCase();
if (type == 'text'||type == 'json') {
json.dataType = type;
}
}else{
json.dataType = 'json';
}
json.method = 'post';
api.ajax(json,
function(ret,err){
if (ret) {
fnSuc && fnSuc(ret);
}
}
);
};
u.get = function(/*url,fnSuc,dataType*/){
var argsToJson = parseArguments.apply(null, arguments);
var json = {};
var fnSuc = argsToJson.fnSuc;
argsToJson.url && (json.url = argsToJson.url);
//argsToJson.data && (json.data = argsToJson.data);
if(argsToJson.dataType){
var type = argsToJson.dataType.toLowerCase();
if (type == 'text'||type == 'json') {
json.dataType = type;
}
}else{
json.dataType = 'text';
}
json.method = 'get';
api.ajax(json,
function(ret,err){
if (ret) {
fnSuc && fnSuc(ret);
}
}
);
};
/*end*/
window.$api = u;
})(window);
1.4.4 使用方法：
//引入api.js
<script type="text/javascript" src="api.js"></script>
$api.byId('sys-info').innerHTML = str
本篇主要描述的是$api对象。 通篇使用发布者订阅模式 而且很多方法确实是开发中很实用且经常用到的方法
如果有想法的同学可以封装起来做一个自己的自定义库以后开发的时候使用一定事半功倍
初步的搭建就算完成了！(⁎⁍̴̛ᴗ⁍̴̛⁎)本节就将这么多啦！
当然了 还有几个需要克服比较复杂的问题
例如关于移动端单位适配问题 关于click事件的200毫秒延迟移除问题等等。。。