unity 实现计算器代码

本文为大家分享了unity实现简单计算器的具体代码，供大家参考，具体内容如下：

using System.Text;
using UnityEngine;
using UnityEngine.UI;
using DG.Tweening;
using System;

public class Calculator : MonoBehaviour
{
  public Text SpendText;
  private StringBuilder spendPrice;//初始金额
  private string rmbSymbol;
  private float totalPrice, spendPrices;//总和,初始金额
  private bool isFirstDecrease;//避免减为零后的第二次起不能为负
  private bool? isPlusOrDecrease, countType;//点击加减符号，点击等号
  public Button PointButton; 
  private int count;//限制最大输入数
  private void Start()
  {
      spendPrice = new StringBuilder();
      totalPrice = 0;
      spendPrices = 0;
      rmbSymbol = "<size='50'></size> ";
      isPlusOrDecrease = null;//true为加，false为减
      countType = null;//true为加，false为减
      isFirstDecrease = true;
      count = 0;
  }

  public void PointButtonController(bool type)
  {
      PointButton.interactable = type;
  }

  public void InputNumber(int num)
  {
      //按钮
      switch (num)
      {
          case 0:
              if (count < 11)
              {
                  count++;
                  spendPrice.Append("0");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 1:
              if (count < 11)
              {
                  count++;
                  spendPrice.Append("1");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 2:
              if (count < 11)
              {
                  count++;
                  spendPrice.Append("2");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 3:
              if (count < 11)
              {
                  count++;
                  spendPrice.Append("3");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 4:
              if (count < 11)
              {
                  count++;
                  spendPrice.Append("4");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 5:
              if (count < 11)
              {
                  count++;
                  spendPrice.Append("5");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 6:
              if (count < 11)
              {
                  count++;
                  spendPrice.Append("6");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 7:
              if (count < 11)
              {
                  count++;
                  spendPrice.Append("7");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 8:
              if (count < 11)
              {
                  count++;
                  spendPrice.Append("8");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 9:
              if (count < 11)
              {
                  count++;
                  spendPrice.Append("9");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 10:
              if (count < 11)
              {
                  count += 2;
                  spendPrice.Append("00");
                  SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              }
              break;
          case 11://加
              isPlusOrDecrease = true;
              countType = true;
              count = 0;
              if (!spendPrice.ToString().Equals(""))
              {
                  if ((totalPrice + float.Parse(spendPrice.ToString()) < 99999999999) && !totalPrice.ToString().Contains("E"))
                  {
                      
                      PointButtonController(true);
                      if (totalPrice != 0)//避免第一次点击加号时没反应
                      {
                          TotalCount();
                      }
                      CountNum();
                  }
                  else
                  {
                      count = 0;
                      PointButtonController(true);
                      totalPrice = 0;
                      spendPrice.Clear();
                      SpendText.DOText(rmbSymbol, 0);
                      isFirstDecrease = true;
                  }
              }
              break;
          case 12://减
              isPlusOrDecrease = false;
              countType = false;
              count = 0;
              if (!spendPrice.ToString().Equals(""))
              {
                  if ((totalPrice + float.Parse(spendPrice.ToString()) < 99999999999) && !totalPrice.ToString().Contains("E"))
                  {
                      PointButtonController(true);
                      if (totalPrice != 0)//避免第一次点击减号时没反应
                      {
                          TotalCount();
                      }
                      CountNum();
                  }
                  else
                  {
                      count = 0;
                      PointButtonController(true);
                      totalPrice = 0;
                      spendPrice.Clear();
                      SpendText.DOText(rmbSymbol, 0);
                      isFirstDecrease = true;
                  }
              }
              break;
          case 13://点
              PointButtonController(false);
              spendPrice.Append(".");
              SpendText.DOText(rmbSymbol + spendPrice.ToString(), 0.1f);
              break;
          case 14://等号
              count = 0;
              if (!spendPrice.ToString().Equals(""))
              {
                  if ((totalPrice + float.Parse(spendPrice.ToString()) < 9999999999) && !totalPrice.ToString().Contains("E"))
                  {
                      PointButtonController(true);
                      TotalCount();
                  }
                  else
                  {
                      count = 0;
                      PointButtonController(true);
                      totalPrice = 0;
                      spendPrice.Clear();
                      SpendText.DOText(rmbSymbol, 0);
                      isFirstDecrease = true;
                  }
              }
              break;
          case 15://清零
              count = 0;
              PointButtonController(true);
              totalPrice = 0;
              spendPrice.Clear();
              SpendText.DOText(rmbSymbol, 0);
              isFirstDecrease = true;
              break;
          default:
              break;
      }
  }
  public void CountNum()
  {
      if (spendPrice.ToString().StartsWith("0") || spendPrice.ToString().Equals(""))//去除开始的无效零
      {
          if (spendPrice.ToString().TrimStart('0') == "" || spendPrice.ToString().TrimStart('0').TrimEnd('0') == ".")//0000，00.00，0.，.0
          {
              spendPrices = 0;
          }
          else
          {
              spendPrices = float.Parse((float.Parse(spendPrice.ToString().TrimStart('0'))).ToString("f2"));
          }
      }
      else
      {
          spendPrices = float.Parse((float.Parse(spendPrice.ToString())).ToString("f2"));
      }
      if (isPlusOrDecrease == true && totalPrice != 0 && spendPrices != 0)
      {
          totalPrice += spendPrices;
          spendPrice.Clear();
          SpendText.DOText(rmbSymbol + totalPrice.ToString(), 0.1f);
          isPlusOrDecrease = null;
      }
      else if (isPlusOrDecrease == true && totalPrice == 0 && spendPrices != 0 && spendPrices != 0)
      {
          totalPrice = spendPrices;
          spendPrice.Clear();
      }
      
      if (isPlusOrDecrease == false && totalPrice == 0 && spendPrices != 0 && isFirstDecrease)
      {
          totalPrice = spendPrices;
          spendPrice.Clear();
          isFirstDecrease = false;
      }
      else if (isPlusOrDecrease == false && spendPrices != 0)
      {
          totalPrice -= spendPrices;
          spendPrice.Clear();
          SpendText.DOText(rmbSymbol + totalPrice.ToString(), 0.1f);
          isPlusOrDecrease = null;
      }
  }

  public void TotalCount()
  {
      if (spendPrice.ToString().StartsWith("0") || spendPrice.ToString().Equals(""))
      {
          if (spendPrice.ToString().TrimStart('0') == "" || spendPrice.ToString().TrimStart('0').TrimEnd('0') == ".")
          {
              spendPrices = 0;
          }
          else
          {
              spendPrices = float.Parse((float.Parse(spendPrice.ToString().TrimStart('0'))).ToString("f2"));
          }
      }
      else
      {
          spendPrices = float.Parse((float.Parse(spendPrice.ToString())).ToString("f2"));
      }
      if (spendPrices != 0)
      {
          if (countType == true)
          {
              totalPrice += spendPrices;
          }
          else if (countType == false)
          {
              totalPrice -= spendPrices;
          }
          spendPrice.Clear();
          SpendText.DOText(rmbSymbol + totalPrice.ToString(), 0.1f);
          countType = null;
      }
  }
  //将科学计数法转化为普通数字
  private Decimal ChangeDataToD(string strData)
  {
      Decimal dData = 0.0M;
      if (strData.Contains("E"))
      {
          dData = Decimal.Parse(strData, System.Globalization.NumberStyles.Float);
      }
      return dData;
  }
}

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