微信小程序计算器实例详解

微信小程序计算器实例，供大家参考，具体内容如下

index.wxml

<view class=\"content\">
    <view class=\"num\">{{num}}</view>
    <view class=\"operotor\">{{op}}</view>
</view>
<view class=\"entry\">
    <view>
        <view class=\"item\" bindtap=\"resetBtn\">c</view>
        <view class=\"item\" bindtap=\"delBtn\">DEL</view>
        <view class=\"item\" bindtap=\"opBtn\" data-val=\"%\">%</view>
        <view class=\"item\" bindtap=\"opBtn\" data-val=\"/\">÷</view>
    </view>
    <view>
        <view class=\"item\" bindtap=\"numBtn\" data-val=\"7\">7</view>
        <view class=\"item\" bindtap=\"numBtn\" data-val=\"8\">8</view>
        <view class=\"item\" bindtap=\"numBtn\" data-val=\"9\">9</view>
        <view class=\"item\" bindtap=\"opBtn\" data-val=\"*\">x</view>
    </view>
    <view>
        <view class=\"item\" bindtap=\"numBtn\" data-val=\"4\">4</view>
        <view class=\"item\" bindtap=\"numBtn\" data-val=\"5\">5</view>
        <view class=\"item\" bindtap=\"numBtn\" data-val=\"6\">6</view>
        <view class=\"item\" bindtap=\"opBtn\" data-val=\"-\">-</view>
    </view>
    <view>
        <view class=\"item\" bindtap=\"numBtn\" data-val=\"1\">1</view>
        <view class=\"item\" bindtap=\"numBtn\" data-val=\"2\">2</view>
        <view class=\"item\" bindtap=\"numBtn\" data-val=\"3\">3</view>
        <view class=\"item\" bindtap=\"opBtn\" data-val=\"+\">+</view>
    </view>
    <view>
        <view class=\"item tow\" bindtap=\"numBtn\" data-val=\"0\">0</view>
        <view class=\"item one\" bindtap=\"dotBtn\" data-val=\".\">.</view>
        <view class=\"item one\" bindtap=\"opBtn\" data-val=\"=\">=</view>
    </view>
</view>

index.css

page {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.content {
  flex: 1;
  background-color: #f3f6fe;
  position: relative;
}
.content .num {
  position: absolute;
  font-size: 27pt;
  bottom: 5vh;
  right: 3vw;
}
.content .operotor {
  font-size: 15pt;
  position: absolute;
  bottom: 1vh;
  right: 3vw;
}
.entry {
  flex: 1;
  font-size: 17pt;
  border-top: 1rpx solid #ccc;
}
.entry .item {
  flex: 1;
  padding: 30rpx 0;
  text-align: center;
  flex-basis: 25%;
  border-left: 1rpx solid #ccc;
  border-bottom: 1rpx solid #ccc;
}
.entry > view {
  display: flex;
}
.entry > view .tow {
  flex: 2;
}
.entry > view .one {
  flex: 1;
}

index.js

Page({
    data: {
        num: \"\",  // 存储数字
        op: \"\"    //存储运算符
    },
    result: null,  
    isClear: false,

    numBtn: function(e) {
        var num = e.target.dataset.val
            //console.log(num) 得到data-val的值
        console.log(this.isClear)
        if (this.data.num === \"0\" || this.isClear) {
            this.setData({ num: num })
            this.isClear = false
        } else {
            this.setData({ num: this.data.num + num })
        }
    },

    opBtn: function(e) {
        var op = this.data.op
        var num = Number(this.data.num)
        this.setData({ op: e.target.dataset.val })
        if (this.isClear) {
            return
        }
        this.isClear = true
        if (this.result === null) {
            this.result = num
            return
        }
        if (op === \"+\") {
            this.result = this.result + num
        } else if (op === \"-\") {
            this.result = this.result - num
        } else if (op === \"*\") {
            this.result = this.result * num
        } else if (op === \"/\") {
            this.result = this.result / num
        } else if (op === \"%\") {
            this.result = this.result % num
        }
        this.setData({ num: this.result })
    },

    dotBtn: function() {
        if (this.isClear) {
            this.setData({ num: \"0.\" })
            this.isClear = false
            return
        }
        if (this.data.num.indexOf(\".\") >= 0) {
            return
        }
        this.setData({ num: this.data.num + \".\" })
    },
    delBtn: function() {

        var num = this.data.num.substr(0, this.data.num.length - 1)
        this.setData({ num: num === \"\" ? \"0\" : num })
    },
    resetBtn: function() {
        this.result = null
        this.isClear = false
        this.setData({ num: \"0\", op: \"\" })
    }
})

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。