微信小程式實現簡單的計算器功能
阿新 • • 發佈:2021-07-21
本文例項為大家分享了微信小程式實現計算器功能的具體程式碼,供大家參考,具體內容如下
wxml
<view class='content'> <input value='{{calculation}}'></input> <view class='box'> <button class='yellow-color'>退格</button> <button class='yellow-color' bindtap='empty'>清屏</button> <button class='yellow-color'>❤</button> http://www.cppcns.com<button bindtap='add' data-text='+' class='yellow-color'>+</button> </view> <view class='box'> <button bindtap='add' data-twww.cppcns.comext='9'>9</button> <button bindtap='add' data-text='8'>8</button> <button bindtap='add' data-text='7'>7</button> <button bindtap='add' class='yellow-color' data-text='-'>-</button> </view> <view class='box'> <button bindtap='add' data-text='6'>6</button> <button bindtap='add' data-text='5'>5</button> <button bindtap='add' data-text='4'>4</button> <button bindtap='add' class='yellow-color' data-text='*'>*</button> </view> <view class='box'> <button bindtap='add' data-text='3'>3</button> <button bindtap='add' data-text='2'>2</button> <button bindtap='add' data-text='1'>1</button> <button bindtap='add' data-text='/' class='yellow-color'></button> </view> <view class='box'> <button bindtap='add' data-text='0'>0</button> <button bindtap='add' data-text='.'>.</button> <button>歷史</button> <button class='yellow-color' bindtap='res'>=</button> </view> </view>
wxss
input { width: 95%; height: 250rpx; margin: 0 auto; margin-bottom: 20rpx; border-bottom: 1rpx solid #ccc; } .box { display: flex; } button { width: 20%; height: 150rpx; margin-bottom: 20rpx; line-height: 150rpx; background-color:rgb(0,150,250); color: white; } .yellow-color { background-color: rgb(247,142,24) }
//index.js
//獲取應用例項
const app = getApp()
Page({
data: {
calculation:"",result:0,character:[],// 運算子號
operand: [],// 數字
temp:false
},// 輸入框輸入資料
add:function(e) {
let input = e.currentTarget.dataset.text;
var that = this;
if (input == '+' || input == '-' || input == '*' || input == '/') {
this.data.temp = false; // 用於記錄上一次是否是操作符
var item = 'character[' + this.data.character.length+ ']';
this.setData({
[item] :input
})
} else {
var item = 'operand['+this.data.operand.length+']';
if(that.data.temp) {
// 拿到前一個的值
var res = 'operand[' + (this.data.operand.length-1) + ']'
var ress= that.data.operand.length-1;
var xyz = that.data.operand[ress] * 10 + parseInt(input);
that.setData({
[res]:xyz
})
} else {
input = parseInt(input);
that.data.temp = true;
that.setData({
[item]: input
})
}
}
// 將所有的內容放到顯示框中
this.setData({
calculation:this.data.calculation+input
})
},// 計算答案
res:function() {
console.log(this.data.character.length);
console.log(this.data.operand.length)
var character_len = this.data.character.length ;
var operand_len = this.data.operand.length;
console.log(operand_len - character_len)
if(operand_len - character_len == 1) {
this.data.result = this.data.operand[0];
console.log("初始值"+this.data.result);
for(var i=0;i<character_len;i++) {
if(this.data.character[i] == '+') {
this.data.result = this.data.result + this.data.operand[i + 1];
}
if (this.data.character[i] == '-') {
this.data.result = this.data.result - this.data.operand[i + 1];
}
if (this.data.character[i] == '*') {
this.data.result = this.data.result * this.data.operand[i + 1];
qPICWQ }
if (this.data.character[i] == '/') {
this.data.result = this.data.result / this.data.operand[i + 1];
}
}
} else {
this.setData({
result:'輸入有誤,清空資料,重新輸入'
})
}
this.setData({
calculation:this.data.result
})
},// 清空螢幕
empty:function() {
this.setData({
calculation: "",result: 0,character: [],// 運算子號
operand: [],// 數字
temp: false
}
}
})
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。