一、起因
最近支付的同事说，数字键盘有些问题；在移动设备上有时候比较难出现点（.） 和数字在一起的格局；因此，考虑到这种情况，就建议手写个模拟键盘了。花了一晚上的时间，写了个简单的键盘，基本能用。考虑到有的开发者没有使用juqery,就使用原生的js了。
Github地址：https://github.com/vczero/keyboard
二、截图如下
三、体验地址（需要点击input才能弹出数字键盘的哦）
URL: http://vczero.github.io/num_key/index.html
四、代码比较简单，直接贴了
;(function(exports){
var KeyBoard = function(input, options){
var body = document.getElementsByTagName('body')[0];
var DIV_ID = options && options.divId || '__w_l_h_v_c_z_e_r_o_divid';
if(document.getElementById(DIV_ID)){
body.removeChild(document.getElementById(DIV_ID));
}
this.input = input;
this.el = document.createElement('div');
var self = this;
var zIndex = options && options.zIndex || 1000;
var width = options && options.width || '100%';
var height = options && options.height || '193px';
var fontSize = options && options.fontSize || '15px';
var backgroundColor = options && options.backgroundColor || '#fff';
var TABLE_ID = options && options.table_id || 'table_0909099';
var mobile = typeof orientation !== 'undefined';
this.el.id = DIV_ID;
this.el.style.position = 'absolute';
this.el.style.left = 0;
this.el.style.right = 0;
this.el.style.bottom = 0;
this.el.style.zIndex = zIndex;
this.el.style.width = width;
this.el.style.height = height;
this.el.style.backgroundColor = backgroundColor;
//样式
var cssStr = '<style type="text/css">';
cssStr += '#' + TABLE_ID + '{text-align:center;width:100%;height:160px;border-top:1px solid #CECDCE;background-color:#FFF;}';
cssStr += '#' + TABLE_ID + ' td{width:33%;border:1px solid #ddd;border-right:0;border-top:0;}';
if(!mobile){
cssStr += '#' + TABLE_ID + ' td:hover{background-color:#1FB9FF;color:#FFF;}';
}
cssStr += '</style>';
//Button
var btnStr = '<div style="width:60px;height:28px;background-color:#1FB9FF;';
btnStr += 'float:right;margin-right:5px;text-align:center;color:#fff;';
btnStr += 'line-height:28px;border-radius:3px;margin-bottom:5px;cursor:pointer;">完成</div>';
//table
var tableStr = '<table id="' + TABLE_ID + '" border="0" cellspacing="0" cellpadding="0">';
tableStr += '<tr><td>1</td><td>2</td><td>3</td></tr>';
tableStr += '<tr><td>4</td><td>5</td><td>6</td></tr>';
tableStr += '<tr><td>7</td><td>8</td><td>9</td></tr>';
tableStr += '<tr><td style="background-color:#D3D9DF;">.</td><td>0</td>';
tableStr += '<td style="background-color:#D3D9DF;">删除</td></tr>';
tableStr += '</table>';
this.el.innerHTML = cssStr + btnStr + tableStr;
function addEvent(e){
var ev = e || window.event;
var clickEl = ev.element || ev.target;
var value = clickEl.textContent || clickEl.innerText;
if(clickEl.tagName.toLocaleLowerCase() === 'td' && value !== "删除"){
if(self.input){
self.input.value += value;
}
}else if(clickEl.tagName.toLocaleLowerCase() === 'div' && value === "完成"){
body.removeChild(self.el);
}else if(clickEl.tagName.toLocaleLowerCase() === 'td' && value === "删除"){
var num = self.input.value;
if(num){
var newNum = num.substr(0, num.length - 1);
self.input.value = newNum;
}
}
}
if(mobile){
this.el.ontouchstart = addEvent;
}else{
this.el.onclick = addEvent;
}
body.appendChild(this.el);
}
exports.KeyBoard = KeyBoard;
})(window);
五、简单demo
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>模拟数字键盘</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, minimal-ui" />
</head>
<body>
<div>
<input id="text1" readonly="readonly" type="number" style="height:28px;width:98%;outline:none;border:1px solid #1AB6FF;padding-left:3px;"/>
<br />
<br />
<input id="text2" readonly="readonly" type="number" style="height:28px;width:98%;outline:none;border:1px solid #1AB6FF;padding-left:3px;"/>
</div>
<script type="text/javascript" src="keyboard.js"></script>
<script type="text/javascript">
(function(){
var input1 = document.getElementById('text1');
var input2 = document.getElementById('text2');
input1.onclick = function(){
new KeyBoard(input1);
};
input2.onclick = function(){
new KeyBoard(input2);
};
})();
</script>
</body>
</html>
以上所述就是本文的全部内容了，希望大家能够喜欢。
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