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今天小編給大家分享一下微信小程序如何實現(xiàn)簡單的計算器的相關(guān)知識點,內(nèi)容詳細(xì),邏輯清晰,相信大部分人都還太了解這方面的知識,所以分享這篇文章給大家參考一下,希望大家閱讀完這篇文章后有所收獲,下面我們一起來了解一下吧。
運行截圖
計算器對于界面美觀的要求并不高,只是一些view以及button控件的組合,所以并不需要在界面上費很多功夫。重要的是邏輯層,之所以選擇計算器作為上手的第一個項目,因為計算器的邏輯可簡可繁,完全可以適應(yīng)新手對小程序的掌握程度。
js:
Page({ data: { result:"0", id1:"clear", id2:"back", id3:"time", id4:"div", id5:"mul", id6:"sub", id7:"add", id8:"dot", id9:"eql", id10:"num_0", id11:"num_1", id12:"num_2", id13:"num_3", id14:"num_4", id15:"num_5", id16:"num_6", id17:"num_7", id18:"num_8", id19:"num_9", buttonDot:false, is_time:false }, clickButton: function (e) { console.log(e); var buttonVal = e.target.id; var res = this.data.result; if(this.data.is_time==true){ res=0 } var newbuttonDot=this.data.buttonDot; var sign; if (buttonVal >= "num_0" && buttonVal <= "num_9") { var num=buttonVal.split("_")[1]; if (res == "0" || ((res.length-0) -(length-1)) == "=") { res = num; } else { res = res + num; } } else{ if(buttonVal=="dot") { if(!newbuttonDot) { res = res + "."; } } else if(buttonVal=="clear") { res="0"; } else if(buttonVal=="back") { var length=res.length; if(length>1) { res=res.substr(0,length-1); } else{ res="0"; } } else if (buttonVal == "div" || buttonVal == "mul" || buttonVal == "sub" || buttonVal == "add") { if(res.length){} else{ res=JSON.stringify(res) } var is_sign=res.substr(res.length-1,res.length) if(is_sign=="+"||is_sign=="-"||is_sign=="×"||is_sign=="÷"){ res=res.substr(0,res.length-1); } switch(buttonVal){ case "div": sign ="÷"; break; case "mul": sign ="×"; break; case "sub": sign="-"; break; case "add": sign="+"; break; } if(!isNaN(res.length)) { res.length-1; res=res+sign; } } } this.setData({ is_time:false, result: res, buttonDot:newbuttonDot, }); }, equal: function(e){ var str=this.data.result; var item= ""; var strArray = []; var temp=0; for(var i=0;i<=str.length;i++){ var s=str.charAt(i); if((s!="" && s>="0" && s<="9") || s=="."){ item=item+s; } else{ strArray[temp]=item; temp++; strArray[temp]=s; temp++; item=""; } } if(isNaN(strArray[strArray.length-1])) { strArray.pop(); } var num; var res=strArray[0]*1; for(var i=1;i<=strArray.length;i=i+2){ num=strArray[i+1]; switch(strArray[i]){ case "-": res = (res-0)- (num-0); break; case "+": res = (res-0) + (num-0); break; case "×": res = (res-0)* (num-0); break; case "÷": if(num!="0") { res = (res-0)/ (num-0); } else { res ="∞"; break; } break; } } this.setData({ result:res, }); }, time:function(e){ var util=require("../../utils/util.js"); var time=util.formatTime(new Date()); this.setData({ result:time, is_time:true }); }})
wxml
<!--index.wxml--> <view class="project_name">簡單計算器</view> <view class="screen_content"> <view class="screen">{{result}}</view> </view> <view class="content"> <view class="buttonGroup"> <button id="{{id1}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">C</button> <button id="{{id2}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">BS</button> <button id="{{id3}}" bindtap="time" class="buttonitem color" hover-class="shadow"> <icon type="waiting" color="#66CC33"></icon> </button> <button id="{{id4}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">÷</button> </view> <view class="buttonGroup"> <button id="{{id17}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">7</button> <button id="{{id18}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">8</button> <button id="{{id19}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">9</button> <button id="{{id5}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">×</button> </view> <view class="buttonGroup"> <button id="{{id14}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">4</button> <button id="{{id15}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">5</button> <button id="{{id16}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">6</button> <button id="{{id6}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">-</button> </view> <view class="buttonGroup"> <button id="{{id11}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">1</button> <button id="{{id12}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">2</button> <button id="{{id13}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">3</button> <button id="{{id7}}" bindtap="clickButton" class="buttonitem color" hover-class="shadow">+</button> </view> <view class="buttonGroup"> <button id="{{id10}}" bindtap="clickButton" class="buttonitem1 color" hover-class="shadow">0</button> <button id="{{id8}}" bindtap="clickButton" class="buttonitem1 color" hover-class="shadow">.</button> <button id="{{id9}}" bindtap="equal" class="equal" hover-class="shadow">=</button> </view> </view>
wxss:
/**index.wxss**/ page{ background: #f5f5f5; } .project_name{ position:absolute; top:25px; width:100%; text-align: center; font-size: 30px; } .screen_content{ position: fixed; color: #1b1717; background: #fff; font-size: 40px; bottom: 390px; text-align: right; height:100px; width: 100%; word-wrap: break-word; border-top:1px solid #a8a8a8; border-bottom:1px solid #a8a8a8; } .screen{ position: absolute; font-size: 40px; text-align: right; bottom:0px; width: 96%; left:2%; word-wrap: break-word; } .content{ position: fixed; bottom: 0; } .buttonGroup{ display: flex; flex-direction: row; } .buttonitem{ text-align: center; line-height: 120rpx; width: 25%; border-radius: 0; } .buttonitem1{ width: 192rpx; text-align: center; line-height: 120rpx; border-radius: 0; } icon{ position: absolute; top: 20%; left: 67rpx; } .color{ background: #fff; } .equal{ width: 380rpx; text-align: center; line-height: 120rpx; border-radius: 0; background: #fff; } .shadow{ background: #e9ebe9; }
以上就是“微信小程序如何實現(xiàn)簡單的計算器”這篇文章的所有內(nèi)容,感謝各位的閱讀!相信大家閱讀完這篇文章都有很大的收獲,小編每天都會為大家更新不同的知識,如果還想學(xué)習(xí)更多的知識,請關(guān)注億速云行業(yè)資訊頻道。
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