微信小程序开发-科学计算器案例源码.zip

//index.js var app = getApp() var util = require('../../utils/util.js'); var calc = require('../../utils/calc.js'); var core = require('../../utils/core.js'); Page({ data: { layout:[ [{ opt:"bindViewTapOpt", type:"default", id:"!", value:"!", }, { opt:"bindViewTapOpt", type:"default", id:"^", value:"^", }, { opt:"bindViewTapOpt", type:"default", id:"√", value:"√", }, { opt:"bindViewTapOpt", type:"default", id:"π", value:"π", }, { opt:"bindViewTapOpt", type:"warn", id:"c", value:"C", }], [{ opt:"bindViewTapOpt", type:"default", id:"sin", value:"sin", }, { opt:"bindViewTapOpt", type:"default", id:"(", value:"(", }, { opt:"bindViewTapOpt", type:"default", id:")", value:")", }, { opt:"bindViewTapOpt", type:"default", id:"e", value:"e", }, { opt:"bindViewTapOpt", type:"warn", id:"ac", value:"AC", }], [{ opt:"bindViewTapOpt", type:"default", id:"cos", value:"cos", }, { opt:"bindViewTapInput", type:"default", id:"7", value:"7", }, { opt:"bindViewTapInput", type:"default", id:"8", value:"8", }, { opt:"bindViewTapInput", type:"default", id:"9", value:"9", }, { opt:"bindViewTapOpt", type:"primary", id:"÷", value:"÷", }], [{ opt:"bindViewTapOpt", type:"default", id:"tan", value:"tan", }, { opt:"bindViewTapInput", type:"default", id:"4", value:"4", }, { opt:"bindViewTapInput", type:"default", id:"5", value:"5", }, { opt:"bindViewTapInput", type:"default", id:"6", value:"6", }, { opt:"bindViewTapOpt", type:"primary", id:"×", value:"×", }], [{ opt:"bindViewTapOpt", type:"default", id:"ln", value:"ln", }, { opt:"bindViewTapInput", type:"default", id:"1", value:"1", }, { opt:"bindViewTapInput", type:"default", id:"2", value:"2", }, { opt:"bindViewTapInput", type:"default", id:"3", value:"3", }, { opt:"bindViewTapOpt", type:"primary", id:"-", value:"-", }], [{ opt:"bindViewTapOpt", type:"default", id:"lg", value:"lg", }, { opt:"bindViewTapInput", type:"default", id:"0", value:"0", }, { opt:"bindViewTapInput", type:"default", id:".", value:".", }, { opt:"bindViewTapOpt", type:"warn", id:"=", value:"=", }, { opt:"bindViewTapOpt", type:"primary", id:"+", value:"+", }]], lines: [ "", "", "", "", 0 ], power:1, line:"------------------------------------------------", infix:"0" }, onLoad: function () { wx.setNavigationBarTitle({ title: '科学计算器' }) //core.showToast(); //core.showModal(); //core.showActionSheet(); this.clear(); }, onReady: function() { wx.showNavigationBarLoading(); wx.hideNavigationBarLoading(); wx.setNavigationBarTitle({ title: '科学计算器' }) }, onShow: function() { }, clear:function(){ this.output([0]); }, clearAll:function(){ this.output(["","","","",0],true); this.setData({ infix: "", }); }, calculator:function(){ var infix = this.data.infix; var res = calc.calculate(infix); this.makeInfix("0",true); return res; }, bindViewTapInput:function (e){ var content = e.currentTarget.id; this.getNumber(content); }, bindViewTapOpt:function (e){ var content = e.currentTarget.id; //console.log(content); switch(content){ case 'c': this.clear(); break; case 't': this.clearAll(); console.log(util.formatTime(new Date())); this.output([util.formatTime(new Date())]); break; case 'of': this.setData({ power:0-this.data.power }); this.clearAll(); break; case 'ac': this.clearAll(); break; case '=': this.makeInfix(); var res = this.calculator(); this.output([this.data.line,res],true); break; default: this.makeInfix(content); this.output([content],true); break; } }, makeInfix:function(content,flash){ //生成中缀表达式 content = content ? content : ""; var oldInfix = this.data.infix.toString(); var lastNum = this.data.lines[(this.data.lines.length-1)].toString(); if(oldInfix == "0"){ oldInfix = ""; } if(!flash){ content = oldInfix+lastNum+content; } console.log(content); this.setData({ infix:content }); }, getNumber:function(content){ var lines = this.data.lines; var move = false; var old = lines[(lines.length-1)].toString(); var newNum; if(content=="." && old.indexOf(".")!=-1){ //当原字符串有小数点时再输入小数点无反应 return false; } if(content=="0" && old=="0"){ //当原字符串等于0再输入0无反应 return false; } if(isNaN(old) && old != "0."){ //当原字符串是非数字即操作符(+-×÷)时新字符串另起一行为新数字 //需要排除 0. 这个不是字符,但是需要继续拼接 if(content=="."){ content = "0."; } newNum = content; //另起一行的标志 move = true; }else{ if(old == "0" && content != "."){ //当原字符串是0的时候又不是小数,需要把0去掉 old = ""; } newNum = old+content; } this.output([newNum],move); }, output:function(content,move){ var lines = this.data.lines; if(move){ for(var index in content){ lines.shift(); lines.push(content[index]); } }else{ lines[(lines.length-1)] = content[0]; } if(this.data.power <= 0){ lines = ["","","","",""]; } this.setData({ lines:lines }); //console.log(this.data); } })