ios开发简单计算器

此篇博客为ios开发的基础篇：ios开发简单计算器

1.基本功能：

（1）、可进行普通的加减乘除；

（2）、可进行连加、连减、连乘、连除；

（3）、可进行“退后”和“清除”处理；

2.代码：

.h文件中：

//

// ViewController.h

// SimpleCalculator

//

// Created by 郑俊杭的MacBook Air on 16/4/20.

// Copyright © 2016年郑俊杭的MacBook Air. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface ViewController :
UIViewController

@property (retain,nonatomic)UILabel *label;

@property (retain,nonatomic)UIButton *button1,*button2,*button3,*button4,*button5,*button6;

@property (retain,nonatomic)NSMutableString *mutableString;

@property (assign,nonatomic)double num1,num2,num3;

@property (assign,nonatomic)int n,m;

@property (retain,nonatomic)NSString *fuhao,*point;

@end

.m文件中：

//

// ViewController.m

// SimpleCalculator

//

// Created by 郑俊杭的MacBook Air on 16/4/20.

// Copyright © 2016年郑俊杭的MacBook Air. All rights reserved.

//

#import "ViewController.h"

@interface
ViewController ()

@end

@implementation ViewController

- (void)shuzi:(id)sender{

// self.mutableString=[sender titleForState:UIControlStateNormal];将点击的button储存起来用NSString来接

// [self.mutableString appendString:i];将字符串加到可变字符串中

self.n++;

NSLog(@"n:%d",self.n);

if(self.n==0){

[self.mutableStringsetString:@""];//将取到的值清空

[self.mutableStringappendString:[sendercurrentTitle]];

self.label.text=self.mutableString;

NSLog(@"%@",self.mutableString);

}

else{

[self.mutableStringappendString:[sendercurrentTitle]];

self.point=[sendertitleForState:UIControlStateNormal];

self.label.text=self.mutableString;

NSLog(@"%@",self.mutableString);

}

}

- (void)yunsuan:(id)sender{

self.m++;

NSLog(@"m:%d",self.m);

if(self.m==1){

self.num1=[self.label.textdoubleValue];//将第一次文本框的值转换成int型，并赋值给self.num1

[self.mutableStringsetString:@""];//将取到的值清空

self.fuhao=[sendertitleForState:UIControlStateNormal];//接受到符号

// self.label.text=self.fuhao;//将符号赋值给文本框

}

else{

NSLog(@"num1:%f",self.num1);

self.num3=[self.label.textdoubleValue];

NSLog(@"num3:%f",self.num3);

if([self.fuhaoisEqualToString:@"+"])

{

// NSLog(@"进行的运算为“+”：");

self.label.text=[NSStringstringWithFormat:@"%f",self.num1+self.num3];

self.num1=self.num1+self.num3;

[self.mutableStringsetString:@""];

self.fuhao=[sendertitleForState:UIControlStateNormal];

}

else if([self.fuhaoisEqualToString:@"-"])

{

// NSLog(@"进行的运算为“-”：");

self.label.text=[NSStringstringWithFormat:@"%f",self.num1-self.num3];

self.num1=self.num1-self.num3;

[self.mutableStringsetString:@""];

self.fuhao=[sendertitleForState:UIControlStateNormal];

}

else if([self.fuhaoisEqualToString:@"×"])

{

// NSLog(@"进行的运算为“×”：");

self.label.text=[NSStringstringWithFormat:@"%f",self.num1*self.num3];

self.num1=self.num1*self.num3;

[self.mutableStringsetString:@""];

self.fuhao=[sendertitleForState:UIControlStateNormal];

}

else if([self.fuhaoisEqualToString:@"÷"])

{

// NSLog(@"进行的运算为“÷”：");

self.label.text=[NSStringstringWithFormat:@"%f",self.num1/self.num3];

self.num1=self.num1/self.num3;

[self.mutableStringsetString:@""];

self.fuhao=[sendertitleForState:UIControlStateNormal];

}

}

}

- (void)tuihou:(id)sender{

[self.mutableStringdeleteCharactersInRange:NSMakeRange([self.mutableStringlength]-1,1)];

self.label.text=self.mutableString;

self.n--;

NSLog(@"n:%d",self.n);

}

- (void)equal:(id)sender{

self.num2=[self.label.textdoubleValue];

NSLog(@"self.num1:%f",self.num1);

NSLog(@"self.num2:%f",self.num2);

self.label.text=[NSStringstringWithFormat:@"%f",self.num2];

if([self.fuhaoisEqualToString:@"+"])

{

// NSLog(@"进行的运算为“+”：");

self.label.text=[NSStringstringWithFormat:@"%f",self.num1+self.num2];

NSLog(@"结果：%f",self.num1+self.num2);

self.n=-1;

self.m=0;

}

elseif([self.fuhaoisEqualToString:@"-"])

{

// NSLog(@"进行的运算为“-”：");

self.label.text=[NSStringstringWithFormat:@"%f",self.num1-self.num2];

NSLog(@"结果：%f",self.num1-self.num2);

self.n=-1;

self.m=0;

}

elseif([self.fuhaoisEqualToString:@"×"])

{

// NSLog(@"进行的运算为“×”：");

self.label.text=[NSStringstringWithFormat:@"%f",self.num1*self.num2];

NSLog(@"结果：%f",self.num1*self.num2);

self.n=-1;

self.m=0;

}

elseif([self.fuhaoisEqualToString:@"÷"])

{

// NSLog(@"进行的运算为“÷”：");

self.label.text=[NSStringstringWithFormat:@"%f",self.num1/self.num2];

NSLog(@"结果：%f",self.num1/self.num2);

self.n=-1;

self.m=0;

}

}

- (void)qingchu:(id)sender{

self.n=0;

NSLog(@"n:%d",self.n);

self.m=0;

NSLog(@"m:%d",self.m);

[self.mutableStringsetString:@""];//将取到的值清空

NSLog(@"self.mutableString为:（“%@”）",self.mutableString);

self.num1=0;

self.num2=0;

self.label.text=@"0";//将第二次取到的值赋值给文本框

self.fuhao=@"";

NSLog(@"清除完毕！");

UIAlertController *alert=[UIAlertControlleralertControllerWithTitle:@"提示"message:@"清除完毕!"preferredStyle:UIAlertControllerStyleAlert];

[alert addAction:[UIAlertActionactionWithTitle:@"确定"style:UIAlertActionStyleDefaulthandler:nil]];

[selfpresentViewController:alertanimated:truecompletion:nil];

}

- (void)viewDidLoad {

[superviewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

self.mutableString=[[NSMutableStringalloc]init];

self.label=[[UILabelalloc]initWithFrame:CGRectMake(45,60,320,
100)];

self.label.backgroundColor=[UIColorgrayColor];

self.label.layer.masksToBounds
= YES ;//给label的边框设置圆角

self.label.layer.cornerRadius
= 20 ;
// 设置圆角大小

self.label.text=@"0";

self.label.font=[UIFontsystemFontOfSize:30];

self.label.textColor=[UIColorwhiteColor];

[self.viewaddSubview:self.label];

for(int i=0;i<3;i++)

{

for(int j=0;j<4;j++)

{

if(j+i*4>9)

{

break;

}

else

{

self.button1=[[UIButtonalloc]initWithFrame:CGRectMake(45+j*80,200+i*100,80,
50)];

// self.button1=[UIButton buttonWithType:UIButtonTypeRoundedRect];

self.button1.layer.masksToBounds =YES ;//给button1的边框设置圆角

self.button1.layer.cornerRadius =20 ;

[self.button1setTitle:[NSStringstringWithFormat:@"%d",j+i*4]forState:UIControlStateNormal];

self.button1.titleLabel.font=[UIFontsystemFontOfSize:40];

[self.button1setBackgroundColor:[UIColorblueColor]];

[self.button1setTitleColor:[UIColorwhiteColor]forState:UIControlStateHighlighted];

self.button1.showsTouchWhenHighlighted=YES;

[self.viewaddSubview:self.button1];

[self.button1addTarget:selfaction:@selector(shuzi:)forControlEvents:UIControlEventTouchUpInside];

}

}

}

for(int i=0;i<4;i++){

self.button2=[[UIButtonalloc]initWithFrame:CGRectMake(45+i*80,500,80,
50)];

// self.button2=[UIButton buttonWithType:UIButtonTypeRoundedRect];

self.button2.layer.masksToBounds
= YES ;//给button2的边框设置圆角

self.button2.layer.cornerRadius
= 20 ;

if(i==0)

{

[self.button2setTitle:@"+"forState:UIControlStateNormal];

}

else if(i==1)

{

[self.button2setTitle:@"-"forState:UIControlStateNormal];

}

else if(i==2)

{

[self.button2setTitle:@"×"forState:UIControlStateNormal];

}

else if(i==3)

{

[self.button2setTitle:@"÷"forState:UIControlStateNormal];

}

self.button2.titleLabel.font=[UIFontsystemFontOfSize:40];

[self.button2setBackgroundColor:[UIColorblueColor]];

[self.button2setTitleColor:[UIColorwhiteColor]forState:UIControlStateHighlighted];

self.button2.showsTouchWhenHighlighted=YES;

[self.viewaddSubview:self.button2];

[self.button2addTarget:selfaction:@selector(yunsuan:)forControlEvents:UIControlEventTouchUpInside];

}

self.button3=[[UIButtonalloc]initWithFrame:CGRectMake(205,400,80,
50)];

// self.button3=[UIButton buttonWithType:UIButtonTypeRoundedRect];

self.button3.layer.masksToBounds
= YES ;//给button3的边框设置圆角

self.button3.layer.cornerRadius
= 20 ;

[self.button3setBackgroundColor:[UIColorblueColor]];

[self.button3setTitle:@"."forState:UIControlStateNormal];

self.button3.titleLabel.font=[UIFontsystemFontOfSize:40];

[self.button3setTitleColor:[UIColorwhiteColor]forState:UIControlStateHighlighted];

self.button3.showsTouchWhenHighlighted=YES;

[self.viewaddSubview:self.button3];

[self.button3addTarget:selfaction:@selector(shuzi:)forControlEvents:UIControlEventTouchUpInside];

self.button4=[[UIButtonalloc]initWithFrame:CGRectMake(285,400,80,
50)];

// self.button4=[UIButton buttonWithType:UIButtonTypeRoundedRect];

self.button4.layer.masksToBounds
= YES ;//给button4的边框设置圆角

self.button4.layer.cornerRadius
= 20 ;

[self.button4setBackgroundColor:[UIColorblueColor]];

[self.button4setTitle:@"="forState:UIControlStateNormal];

self.button4.titleLabel.font=[UIFontsystemFontOfSize:40];

[self.button4setTitleColor:[UIColorwhiteColor]forState:UIControlStateHighlighted];

self.button4.showsTouchWhenHighlighted=YES;

[self.viewaddSubview:self.button4];

[self.button4addTarget:selfaction:@selector(equal:)forControlEvents:UIControlEventTouchUpInside];

self.button5=[[UIButtonalloc]initWithFrame:CGRectMake(45,600,160,
50)];

// self.button5=[UIButton buttonWithType:UIButtonTypeRoundedRect];

self.button5.layer.masksToBounds
= YES ;//给button5的边框设置圆角

self.button5.layer.cornerRadius
= 20 ;

[self.button5setBackgroundColor:[UIColorblueColor]];

[self.button5setTitle:@"退后"forState:UIControlStateNormal];

self.button5.titleLabel.font=[UIFontsystemFontOfSize:40];

[self.button5setTitleColor:[UIColorwhiteColor]forState:UIControlStateHighlighted];

self.button5.showsTouchWhenHighlighted=YES;

[self.viewaddSubview:self.button5];

[self.button5addTarget:selfaction:@selector(tuihou:)forControlEvents:UIControlEventTouchUpInside];

self.button6=[[UIButtonalloc]initWithFrame:CGRectMake(205,600,160,
50)];

// self.button6=[UIButton buttonWithType:UIButtonTypeRoundedRect];

self.button6.layer.masksToBounds
= YES ;//给button6的边框设置圆角

self.button6.layer.cornerRadius
= 20 ;

[self.button6setBackgroundColor:[UIColorblueColor]];

[self.button6setTitle:@"清除"forState:UIControlStateNormal];

self.button6.titleLabel.font=[UIFontsystemFontOfSize:40];

[self.button6setTitleColor:[UIColorwhiteColor]forState:UIControlStateHighlighted];

self.button6.showsTouchWhenHighlighted=YES;

[self.viewaddSubview:self.button6];

[self.button6addTarget:selfaction:@selector(qingchu:)forControlEvents:UIControlEventTouchUpInside];

}

- (void)didReceiveMemoryWarning {

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end

本人申明：

本文为本人的原创文章，未经本人允许不得转载；

本人也是刚开始学ios开发，属于初学者，望各位大神能多给点建议，提出一些程序的不足或需要改进、完善的地方，欢迎发俺的邮箱：854306566@qq.com（非诚勿扰哦O.o)。