本文实例为大家分享了JS实现苹果计算器的具体代码,供大家参考,具体内容如下
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<!DOCTYPE html> < html > < head > < meta charset = "utf-8" > < title >手机</ title > < style type = "text/css" > #phone{ position: relative; width: 380px; height: 700px; box-shadow: 1px 1px 10px #808080; margin: auto; border-radius: 30px; } .kj{ position: absolute; width: 8px; height: 60px; background-color: black; right: -8px ; top:100px; } .yl{ position: absolute; width: 8px; height: 80px; background-color: black; left: -8px; top: 85px; } .top{ width: 120px; height: 50px; /* box-shadow: 1px 1px 10px #808080; */ margin: auto; } .mkf{ float: left; width: 100px; height: 10px; border-radius: 5px; background-color: black; margin-right: 10px; margin-top: 20px; } .sxj{ float: left; width: 10px; height: 10px; border-radius: 5px; background-color: black; margin-top: 20px; } .screen{ width: 370px ; height: 600px; background-color: black; margin: auto; } .result-num{ height: 120px; /* padding-top: 30px; */ } .sp{ float: right; color: white; font-size: 50px; margin-top: 50px; } .num{ height: 480px; } .key{ width: 82.5px; height: 82.5px; border-radius: 50px; background-color: #808080; float: left; margin: 5px; text-align: center; line-height: 80px; font-size: 20px; color: white; } .first{ background-color: #B0B0B0; color: black; } .second{ background-color: orange; } .third{ width: 175px; } .home{ width: 45px; height: 45px; border-radius: 25px; background-color: #B0B0B0; margin: 3px auto 0px auto; } </ style > </ head > < body > < div id = "phone" > <!--开机键--> < div class = "kj" ></ div > <!--音量--> < div class = "yl" ></ div > <!-- 手机顶部 --> < div class = "top" > <!-- 麦克风 --> < div class = "mkf" ></ div > <!-- 摄像头 --> < div class = "sxj" ></ div > </ div > <!-- 屏幕 --> < div class = "screen" > < div class = "result-num" > < span class = "sp" >0</ span > </ div > < div class = "num" > < div class = "key first" onclick = "clearCompute()" >AC</ div > < div class = "key first" onclick = "deleteLastNum()" >←</ div > < div class = "key first" >%</ div > < div class = "key second" onclick = "fun('/')" >/</ div > < div class = "key keynum" onclick = "fun(7)" >7</ div > < div class = "key keynum" onclick = "fun(8)" >8</ div > < div class = "key keynum" onclick = "fun(9)" >9</ div > < div class = "key second" onclick = "fun('*')" >*</ div > < div class = "key keynum" onclick = "fun(4)" >4</ div > < div class = "key keynum" onclick = "fun(5)" >5</ div > < div class = "key keynum" onclick = "fun(6)" >6</ div > < div class = "key second" onclick = "fun('-')" >-</ div > < div class = "key keynum" onclick = "fun(1)" >1</ div > < div class = "key keynum" onclick = "fun(2)" >2</ div > < div class = "key keynum" onclick = "fun(3)" >3</ div > < div class = "key second" onclick = "fun('+')" >+</ div > < div class = "key third keynum" onclick = "fun(0)" >0</ div > < div class = "key" onclick = "fun('.')" >.</ div > < div class = "key second" onclick = "compute()" >=</ div > </ div > </ div > <!-- home键 --> < div class = "home" > </ div > </ div > < script type = "text/javascript" > var span = document.querySelector(".sp"); /** * @param {Object} num * 点击数字键盘 将数字替换到我们的span标签内部 */ function fun(num){ var value = span.innerText; if(value == 0){ span.innerText = num; }else{ span.innerText = span.innerText.concat(num); } } /** * 计算结果的 */ function compute(){ var value = span.innerText; var result= eval(value); span.innerText = result; } /** * 清空计算区域 重置为0 */ function clearCompute(){ span.innerText="0"; } /** * 删除计算区域的最后一个字符 */ function deleteLastNum(){ var value = span.innerText; console.log(typeof(value)) if(value == 0){ } else{ /** * value是一个字符串 * zs123 * 字节:文本在计算器底层存储的时候都是字节存储的 编码集 将字符转成特定的字节在计算机上存储的 * 字符:人类能看懂的一个字母 或者一个中文汉字 * a b 中 国 aj * * 字符串就是一个一个字符组成的一个集合体 字符串String提供了很多常用的方法 以便我们对这个字符数组进行相关操作 */ if(value.length!=1){ span.innerText = value.substring(0,value.length-1) }else{ span.innerText="0"; } } } </ script > </ body > </ html > |
效果图:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/weixin_45177027/article/details/115481766