IOS做一个简单计算器

//声明非原创

步骤：

1.打开Xcode，单机Creat a new Xcode project

2.左边选择ios下Application,右边选择single view Application

3.填写项目名称单机Next

4.ViewController.h中定义成员和方法

//// ViewController.m// TestCalculator4//// Created by heyonggang on 13-11-28.// Copyright (c) 2013年 MiracleHe. All rights reserved.//#import "ViewController.h"#import <QuartzCore/QuartzCore.h>@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad{  [super viewDidLoad];    //创建标签  self.label=[[UILabel alloc]initWithFrame:CGRectMake(90, 40, 200, 50)];  [self.view addSubview:_label];  self.label.backgroundColor=[UIColor greenColor];  //设置背景颜色  self.label.textColor=[UIColor blackColor];     //字体颜色  //self.label.textAlignment = UITextAlignmentRight; //字体居右  self.label.textAlignment = NSTextAlignmentCenter;  self.label.font=[UIFont systemFontOfSize:32.4];  //设置字体      //添加1-9数字  NSArray *array=[NSArray arrayWithObjects:@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9", nil];  int n=0;  for (int i=0; i<3; i++)  {    for (int j=0; j<3; j++)    {      self.button=[UIButton buttonWithType:UIButtonTypeRoundedRect];      self.button.frame=CGRectMake(30+65*j, 150+65*i, 60, 60);      [self.button setTitle:[array objectAtIndex:n++] forState:UIControlStateNormal];  //注意：[array objectAtIndex:n++]      [self.view addSubview:_button];      [self.button addTarget:self action:@selector(shuzi:) forControlEvents:UIControlEventTouchUpInside]; //addTarget:self 的意思是说，这个方法在本类中也可以传入其他类的指针    }  }      //单独添加0  UIButton *button0=[UIButton buttonWithType:UIButtonTypeCustom]; //创建一个圆角矩形的按钮/*  CALayer *layer = button0.layer;  [layer setMasksToBounds:YES];  [layer setCornerRadius:5.0];  button0.layer.borderColor = [UIColor lightGrayColor].CGColor;  button0.layer.borderWidth = 1.0f; */  [button0 setFrame:CGRectMake(30, 345, 60, 60)];            //设置button在view上的位置  //也可以这样用：button0.frame:CGRectMake(30, 345, 60, 60);  [button0 setTitle:@"0" forState:UIControlStateNormal];        //设置button主题  button0.titleLabel.textColor = [UIColor blackColor];    //设置0键的颜色  [button0 addTarget:self action:@selector(shuzi:) forControlEvents:UIControlEventTouchUpInside]; //按下按钮，并且当手指离开离开屏幕的时候触发这个事件                                        //触发了这个事件后，执行shuzi方法，action:@selector(shuzi:)  [self.view addSubview:button0];  //显示控件      //添加运算符  NSArray *array1=[NSArray arrayWithObjects:@"+",@"-",@"*",@"/",nil];  for (int i=0; i<4; i++)  {    UIButton *button1=[UIButton buttonWithType:UIButtonTypeRoundedRect];    [button1 setFrame:CGRectMake(225, 150+65*i, 60, 60)];    [button1 setTitle:[array1 objectAtIndex:i] forState:UIControlStateNormal];    //[array1 objectAtIndex:i]为获取按钮的属性值    [self.view addSubview:button1];    [button1 addTarget:self action:@selector(go:) forControlEvents:UIControlEventTouchUpInside];  }    //添加=  UIButton *button2=[UIButton buttonWithType:UIButtonTypeRoundedRect];  [button2 setFrame:CGRectMake(160, 410, 125, 35)];  [button2 setTitle:@"=" forState:UIControlStateNormal];  [button2 addTarget:self action:@selector(go:) forControlEvents:UIControlEventTouchUpInside];  [self.view addSubview:button2];      //添加清除键  UIButton *button3=[UIButton buttonWithType:UIButtonTypeRoundedRect];  [button3 setFrame:CGRectMake(30, 410, 125, 35)];  [button3 setTitle:@"AC" forState:UIControlStateNormal];  [button3 addTarget:self action:@selector(clean:) forControlEvents:UIControlEventTouchUpInside];  [self.view addSubview:button3];      //添加.  UIButton *button4=[UIButton buttonWithType:UIButtonTypeRoundedRect];  [button4 setFrame:CGRectMake(95, 345, 60, 60)];  [button4 setTitle:@"." forState:UIControlStateNormal];  [button4 addTarget:self action:@selector(shuzi:) forControlEvents:UIControlEventTouchUpInside];  [self.view addSubview:button4];      //后退  UIButton *button5=[UIButton buttonWithType:UIButtonTypeRoundedRect];  [button5 setFrame:CGRectMake(160, 345, 60, 60)];  [button5 setTitle:@"back" forState:UIControlStateNormal];  [button5 addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside];  [self.view addSubview:button5];    self.string=[[NSMutableString alloc]init];//初始化可变字符串，分配内存  self.str = [[NSString alloc]init];  // Do any additional setup after loading the view, typically from a nib.}//0-9方法- (void)shuzi:(id)sender{    [self.string appendString:[sender currentTitle]];   //数字连续输入  self.label.text=[NSString stringWithString:_string];  //显示数值  self.num1=[self.label.text doubleValue];        //保存输入的数值  NSLog(@"self.num1 is %f",self.num1);  }//计算方法-(void)go:(id)sender{  if ([self.str isEqualToString:@""])//当str里为空  {    self.num2=self.num1;    NSLog(@"self.num2 is %f",self.num2);    self.label.text=[NSString stringWithString:_string];   //只要是符号就显示数值    [self.string setString:@""];               //字符串清零    self.str=[sender currentTitle];             //保存运算符为了作判断作何种运算    NSLog(@"%@",_str);    [self.string appendString:self.str];    self.label.text=[NSString stringWithString:_string];   //显示数值    [self.string setString:@""];     //字符串清零  }  else  {    //输出上次计算结果    if ([self.str isEqualToString:@"+"])//之前的符号是+    {      [self.string setString:@""];//字符串清零      self.num2+=self.num1;//num2是运算符号左边的数值，还是计算结果            //输出上次结果后判断这次输入的是何符号      if ([[sender currentTitle]isEqualToString:@"="])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        self.str=@"";      }      else if ([[sender currentTitle]isEqualToString:@"+"]||[[sender currentTitle]isEqualToString:@"-"]||[[sender currentTitle]isEqualToString:@"*"]||[[sender currentTitle]isEqualToString:@"/"])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        [self.string setString:@""];  //字符串清零        self.str=[sender currentTitle];//保存运算符为了作判断作何种运算        NSLog(@"%@",_str);        [self.string appendString:self.str];        [self.string setString:@""];//字符串清零      }    }        else if ([self.str isEqualToString:@"-"])//之前的符号是-    {      [self.string setString:@""];//字符串清零      self.num2-=self.num1;      //输出上次结果后判断这次输入的是何符号      if ([[sender currentTitle]isEqualToString:@"="])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        self.str=@"";      }      else if ([[sender currentTitle]isEqualToString:@"+"]||[[sender currentTitle]isEqualToString:@"-"]||[[sender currentTitle]isEqualToString:@"*"]||[[sender currentTitle]isEqualToString:@"/"])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        [self.string setString:@""];//字符串清零        self.str=[sender currentTitle];//保存运算符为了作判断作何种运算        NSLog(@"%@",_str);        [self.string appendString:self.str];        [self.string setString:@""];//字符串清零      }    }        else if([self.str hasPrefix:@"*"])//之前的符号是*  hasPrefix:方法的功能是判断创建的字符串内容是否以某个字符开始    {      [self.string setString:@""];//字符串清零      self.num2*=self.num1;      //输出上次结果后判断这次输入的是何符号      if ([[sender currentTitle] isEqualToString:@"="])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        self.str=@"";      }      else if ([[sender currentTitle]isEqualToString:@"+"]||[[sender currentTitle]isEqualToString:@"-"]||[[sender currentTitle]isEqualToString:@"*"]||[[sender currentTitle]isEqualToString:@"/"])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        [self.string setString:@""];     //字符串清零        self.str=[sender currentTitle];    //保存运算符为了作判断作何种运算        NSLog(@"%@",_str);        [self.string appendString:self.str]; //在字符串后增加新的东西，［a appendString:]        [self.string setString:@""];     //字符串清零      }    }        else if ([self.str isEqualToString:@"/"])//之前的符号是/    {      [self.string setString:@""];//字符串清零      self.num2/=self.num1;      //判断输出上次结果后判断这次输入的是何符号      if ([[sender currentTitle]isEqualToString:@"="])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        self.str=@"";      }      else if ([[sender currentTitle]isEqualToString:@"+"]||[[sender currentTitle]isEqualToString:@"-"]||[[sender currentTitle]isEqualToString:@"*"]||[[sender currentTitle]isEqualToString:@"/"])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        [self.string setString:@""];//字符串清零        self.str=[sender currentTitle];//保存运算符为了作判断作何种运算        NSLog(@"%@",_str);        [self.string appendString:self.str];        [self.string setString:@""];//字符串清零      }          }  }}//当按下清除建时，所有数据清零-(void)clean:(id)sender{  [self.string setString:@""];//清空字符  self.num1=0;  self.num2=0;  self.label.text=@"0";//保证下次输入时清零  }//返回键-(void)back:(id)sender{  if (![self.label.text isEqualToString:@""])//判断不是空  {    [self.string deleteCharactersInRange:NSMakeRange     ([self.string length]-1,1)];//删除最后一个字符    self.label.text=[NSString stringWithString:_string];//显示结果  }}- (void)viewDidUnload{  [super viewDidUnload];  // Release any retained subviews of the main view.}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{  return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);}- (void)didReceiveMemoryWarning{  [super didReceiveMemoryWarning];  // Dispose of any resources that can be recreated.}@end

---恢复内容结束---

步骤：

1.打开Xcode，单机Creat a new Xcode project

2.左边选择ios下Application,右边选择single view Application

3.填写项目名称单机Next

4.ViewController.h中定义成员和方法

//// ViewController.m// TestCalculator4//// Created by heyonggang on 13-11-28.// Copyright (c) 2013年 MiracleHe. All rights reserved.//#import "ViewController.h"#import <QuartzCore/QuartzCore.h>@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad{  [super viewDidLoad];    //创建标签  self.label=[[UILabel alloc]initWithFrame:CGRectMake(90, 40, 200, 50)];  [self.view addSubview:_label];  self.label.backgroundColor=[UIColor greenColor];  //设置背景颜色  self.label.textColor=[UIColor blackColor];     //字体颜色  //self.label.textAlignment = UITextAlignmentRight; //字体居右  self.label.textAlignment = NSTextAlignmentCenter;  self.label.font=[UIFont systemFontOfSize:32.4];  //设置字体      //添加1-9数字  NSArray *array=[NSArray arrayWithObjects:@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9", nil];  int n=0;  for (int i=0; i<3; i++)  {    for (int j=0; j<3; j++)    {      self.button=[UIButton buttonWithType:UIButtonTypeRoundedRect];      self.button.frame=CGRectMake(30+65*j, 150+65*i, 60, 60);      [self.button setTitle:[array objectAtIndex:n++] forState:UIControlStateNormal];  //注意：[array objectAtIndex:n++]      [self.view addSubview:_button];      [self.button addTarget:self action:@selector(shuzi:) forControlEvents:UIControlEventTouchUpInside]; //addTarget:self 的意思是说，这个方法在本类中也可以传入其他类的指针    }  }      //单独添加0  UIButton *button0=[UIButton buttonWithType:UIButtonTypeCustom]; //创建一个圆角矩形的按钮/*  CALayer *layer = button0.layer;  [layer setMasksToBounds:YES];  [layer setCornerRadius:5.0];  button0.layer.borderColor = [UIColor lightGrayColor].CGColor;  button0.layer.borderWidth = 1.0f; */  [button0 setFrame:CGRectMake(30, 345, 60, 60)];            //设置button在view上的位置  //也可以这样用：button0.frame:CGRectMake(30, 345, 60, 60);  [button0 setTitle:@"0" forState:UIControlStateNormal];        //设置button主题  button0.titleLabel.textColor = [UIColor blackColor];    //设置0键的颜色  [button0 addTarget:self action:@selector(shuzi:) forControlEvents:UIControlEventTouchUpInside]; //按下按钮，并且当手指离开离开屏幕的时候触发这个事件                                        //触发了这个事件后，执行shuzi方法，action:@selector(shuzi:)  [self.view addSubview:button0];  //显示控件      //添加运算符  NSArray *array1=[NSArray arrayWithObjects:@"+",@"-",@"*",@"/",nil];  for (int i=0; i<4; i++)  {    UIButton *button1=[UIButton buttonWithType:UIButtonTypeRoundedRect];    [button1 setFrame:CGRectMake(225, 150+65*i, 60, 60)];    [button1 setTitle:[array1 objectAtIndex:i] forState:UIControlStateNormal];    //[array1 objectAtIndex:i]为获取按钮的属性值    [self.view addSubview:button1];    [button1 addTarget:self action:@selector(go:) forControlEvents:UIControlEventTouchUpInside];  }    //添加=  UIButton *button2=[UIButton buttonWithType:UIButtonTypeRoundedRect];  [button2 setFrame:CGRectMake(160, 410, 125, 35)];  [button2 setTitle:@"=" forState:UIControlStateNormal];  [button2 addTarget:self action:@selector(go:) forControlEvents:UIControlEventTouchUpInside];  [self.view addSubview:button2];      //添加清除键  UIButton *button3=[UIButton buttonWithType:UIButtonTypeRoundedRect];  [button3 setFrame:CGRectMake(30, 410, 125, 35)];  [button3 setTitle:@"AC" forState:UIControlStateNormal];  [button3 addTarget:self action:@selector(clean:) forControlEvents:UIControlEventTouchUpInside];  [self.view addSubview:button3];      //添加.  UIButton *button4=[UIButton buttonWithType:UIButtonTypeRoundedRect];  [button4 setFrame:CGRectMake(95, 345, 60, 60)];  [button4 setTitle:@"." forState:UIControlStateNormal];  [button4 addTarget:self action:@selector(shuzi:) forControlEvents:UIControlEventTouchUpInside];  [self.view addSubview:button4];      //后退  UIButton *button5=[UIButton buttonWithType:UIButtonTypeRoundedRect];  [button5 setFrame:CGRectMake(160, 345, 60, 60)];  [button5 setTitle:@"back" forState:UIControlStateNormal];  [button5 addTarget:self action:@selector(back:) forControlEvents:UIControlEventTouchUpInside];  [self.view addSubview:button5];    self.string=[[NSMutableString alloc]init];//初始化可变字符串，分配内存  self.str = [[NSString alloc]init];  // Do any additional setup after loading the view, typically from a nib.}//0-9方法- (void)shuzi:(id)sender{    [self.string appendString:[sender currentTitle]];   //数字连续输入  self.label.text=[NSString stringWithString:_string];  //显示数值  self.num1=[self.label.text doubleValue];        //保存输入的数值  NSLog(@"self.num1 is %f",self.num1);  }//计算方法-(void)go:(id)sender{  if ([self.str isEqualToString:@""])//当str里为空  {    self.num2=self.num1;    NSLog(@"self.num2 is %f",self.num2);    self.label.text=[NSString stringWithString:_string];   //只要是符号就显示数值    [self.string setString:@""];               //字符串清零    self.str=[sender currentTitle];             //保存运算符为了作判断作何种运算    NSLog(@"%@",_str);    [self.string appendString:self.str];    self.label.text=[NSString stringWithString:_string];   //显示数值    [self.string setString:@""];     //字符串清零  }  else  {    //输出上次计算结果    if ([self.str isEqualToString:@"+"])//之前的符号是+    {      [self.string setString:@""];//字符串清零      self.num2+=self.num1;//num2是运算符号左边的数值，还是计算结果            //输出上次结果后判断这次输入的是何符号      if ([[sender currentTitle]isEqualToString:@"="])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        self.str=@"";      }      else if ([[sender currentTitle]isEqualToString:@"+"]||[[sender currentTitle]isEqualToString:@"-"]||[[sender currentTitle]isEqualToString:@"*"]||[[sender currentTitle]isEqualToString:@"/"])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        [self.string setString:@""];  //字符串清零        self.str=[sender currentTitle];//保存运算符为了作判断作何种运算        NSLog(@"%@",_str);        [self.string appendString:self.str];        [self.string setString:@""];//字符串清零      }    }        else if ([self.str isEqualToString:@"-"])//之前的符号是-    {      [self.string setString:@""];//字符串清零      self.num2-=self.num1;      //输出上次结果后判断这次输入的是何符号      if ([[sender currentTitle]isEqualToString:@"="])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        self.str=@"";      }      else if ([[sender currentTitle]isEqualToString:@"+"]||[[sender currentTitle]isEqualToString:@"-"]||[[sender currentTitle]isEqualToString:@"*"]||[[sender currentTitle]isEqualToString:@"/"])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        [self.string setString:@""];//字符串清零        self.str=[sender currentTitle];//保存运算符为了作判断作何种运算        NSLog(@"%@",_str);        [self.string appendString:self.str];        [self.string setString:@""];//字符串清零      }    }        else if([self.str hasPrefix:@"*"])//之前的符号是*  hasPrefix:方法的功能是判断创建的字符串内容是否以某个字符开始    {      [self.string setString:@""];//字符串清零      self.num2*=self.num1;      //输出上次结果后判断这次输入的是何符号      if ([[sender currentTitle] isEqualToString:@"="])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        self.str=@"";      }      else if ([[sender currentTitle]isEqualToString:@"+"]||[[sender currentTitle]isEqualToString:@"-"]||[[sender currentTitle]isEqualToString:@"*"]||[[sender currentTitle]isEqualToString:@"/"])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        [self.string setString:@""];     //字符串清零        self.str=[sender currentTitle];    //保存运算符为了作判断作何种运算        NSLog(@"%@",_str);        [self.string appendString:self.str]; //在字符串后增加新的东西，［a appendString:]        [self.string setString:@""];     //字符串清零      }    }        else if ([self.str isEqualToString:@"/"])//之前的符号是/    {      [self.string setString:@""];//字符串清零      self.num2/=self.num1;      //判断输出上次结果后判断这次输入的是何符号      if ([[sender currentTitle]isEqualToString:@"="])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        self.str=@"";      }      else if ([[sender currentTitle]isEqualToString:@"+"]||[[sender currentTitle]isEqualToString:@"-"]||[[sender currentTitle]isEqualToString:@"*"]||[[sender currentTitle]isEqualToString:@"/"])      {        NSLog(@"self.num2 is %f",self.num2);        self.label.text=[NSString stringWithFormat:@"%f",self.num2];        [self.string setString:@""];//字符串清零        self.str=[sender currentTitle];//保存运算符为了作判断作何种运算        NSLog(@"%@",_str);        [self.string appendString:self.str];        [self.string setString:@""];//字符串清零      }          }  }}//当按下清除建时，所有数据清零-(void)clean:(id)sender{  [self.string setString:@""];//清空字符  self.num1=0;  self.num2=0;  self.label.text=@"0";//保证下次输入时清零  }//返回键-(void)back:(id)sender{  if (![self.label.text isEqualToString:@""])//判断不是空  {    [self.string deleteCharactersInRange:NSMakeRange     ([self.string length]-1,1)];//删除最后一个字符    self.label.text=[NSString stringWithString:_string];//显示结果  }}- (void)viewDidUnload{  [super viewDidUnload];  // Release any retained subviews of the main view.}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{  return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);}- (void)didReceiveMemoryWarning{  [super didReceiveMemoryWarning];  // Dispose of any resources that can be recreated.}@end

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原标题：IOS做一个简单计算器

关键词：IOS