iOS入门开发计算器小程序，包括button、label、image的使用

来源：互联网发布：hakko编程软件编辑：程序博客网时间：2024/06/14 05:02

大家可以查看下自己X-code的版本号：先点击一次X-code，然后按如下操作

点开之后选择最后一栏locations：（例如我的是X-code 5.1.1是比较高的版本了，可以自动release之类的）

接下来就是计算器小程序的编写：

首先给大家看看完成后的界面吧：

代理里面的文件不动：如我的MJAppDalegate.h 和MJAppDalegate.m还是用系统自带的代码函数，我改变的是控制器函数里面的内容；

选中Main.storyboard可以看到如下，该控制器是连接着view的：（View Controller选中右击）

MJViewController.h文件中：

#import <UIKit/UIKit.h>

@interface MJViewController :UIViewController

@property(retain,nonatomic)UIButton *button;

@property(retain,nonatomic)UILabel *label;

@property(retain,nonatomic)NSMutableString *str;

@property(assign,nonatomic)double inputNum,saveNum,outputNum,jumpNum;

@end

MJViewController.m文件中：

// MJViewController.m

// calculator

// Created by admin on 14-7-28.

#import "MJViewController.h"

@interface MJViewController ()

@end

@implementation MJViewController

@synthesize button,label,str,inputNum,saveNum,outputNum,jumpNum;

- (void)viewDidLoad

{

[superviewDidLoad];

self.str = [[NSMutableStringalloc]init];

//设置背景图片

// NSBundle *bundle = [NSBundle mainBundle];

// NSData *data = [[NSData alloc] initWithContentsOfFile:[bundle pathForResource:@"background" ofType:@"jpg"]];

// UIImage *img = [UIImage imageWithData:data];

UIImage *img = [UIImageimageNamed:@"backgroud.jpg"];

[self.viewsetBackgroundColor:[UIColorcolorWithPatternImage:img]];//将背景图片设置为background.jpg

//添加提示性文字

UIAlertView *alex = [[UIAlertViewalloc]initWithTitle:@"使用说明" message:@"不支持点击运算符连算" delegate:nilcancelButtonTitle:@"OK"otherButtonTitles:nil];

[alexshow];

//创建标签

self.label = [[UILabelalloc]initWithFrame:CGRectMake(90,40,200,50)];

[self.viewaddSubview:label];

self.label.backgroundColor = [UIColor clearColor];//清除背景颜色

self.label.textColor = [UIColor blueColor];//设置字体颜色

self.label.textAlignment = NSTextAlignmentRight;//字体居右;

self.label.font = [UIFont systemFontOfSize:32.4];

//添加数字1-9

NSArray *array = [NSArrayarrayWithObjects:@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",nil];//nil代表指针结束

int n =0;

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

for (int j =0;j <3; j++) {

self.button = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];//设置圆角

self.button.frame =CGRectMake(30 +65*j, 150 +65*i,60,60);

[self.buttonsetBackgroundColor:[UIColorwhiteColor]];

[self.buttonsetTitle:[arrayobjectAtIndex:n++]forState:UIControlStateNormal];

[self.buttonaddTarget:selfaction:@selector(one:)forControlEvents:UIControlEventTouchUpInside];

[self.viewaddSubview:self.button];

}

//添加0按钮

UIButton *button0 = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

[button0setFrame:CGRectMake(30 ,345,60,60)];

[button0 setTitle:@"0"forState:UIControlStateNormal];

[button0 setBackgroundColor:[UIColorwhiteColor]];

[button0 addTarget:selfaction:@selector(one:)forControlEvents:UIControlEventTouchUpInside];

[self.viewaddSubview:button0];

//添加运算符

NSArray *array1 = [NSArrayarrayWithObjects:@"+",@"-",@"*",@"/",nil];

int n1 =0;

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

self.button = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];//设置圆角

self.button.frame =CGRectMake(225,150 +65*i, 60,60);

[self.buttonsetTitle:[array1objectAtIndex:n1++]forState:UIControlStateNormal];

[self.buttonaddTarget:selfaction:@selector(two:)forControlEvents:UIControlEventTouchUpInside];

[self.buttonsetBackgroundColor:[UIColorwhiteColor]];

[self.viewaddSubview:self.button];

}

UIButton *buttonPoint = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

[buttonPointsetFrame:CGRectMake(95,345,60,60)];

[buttonPoint setTitle:@"."forState:UIControlStateNormal];

[buttonPoint addTarget:selfaction:@selector(one:)forControlEvents:UIControlEventTouchUpInside];

[buttonPoint setBackgroundColor:[UIColorwhiteColor]];

[self.viewaddSubview:buttonPoint];

UIButton *button1 = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

[button1setFrame:CGRectMake(160,345,60,60)];

[button1 setTitle:@"back"forState:UIControlStateNormal];

[button1 addTarget:selfaction:@selector(back:)forControlEvents:UIControlEventTouchUpInside];

[button1 setBackgroundColor:[UIColorwhiteColor]];

[self.viewaddSubview:button1];

//清除按钮

UIButton *buttonBack=[UIButtonbuttonWithType:UIButtonTypeRoundedRect];

[buttonBacksetFrame:CGRectMake(30,410,125,40)];

[buttonBack setTitle:@"AC"forState:UIControlStateNormal];

[buttonBack addTarget:selfaction:@selector(clean:)forControlEvents:UIControlEventTouchUpInside];

[buttonBack setBackgroundColor:[UIColorwhiteColor]];

[self.viewaddSubview:buttonBack];

UIButton *button2=[UIButtonbuttonWithType:UIButtonTypeRoundedRect];

[button2setFrame:CGRectMake(160,410,125,40)];

[button2 setTitle:@"="forState:UIControlStateNormal];

[button2 addTarget:selfaction:@selector(go:)forControlEvents:UIControlEventTouchUpInside];

[button2 setBackgroundColor:[UIColorwhiteColor]];

[self.viewaddSubview:button2];

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

}

-(void) one:(UIButton *)sender//按下数字键时调用的函数

{

if ([self.strhasPrefix:@"+"]||[self.strhasPrefix:@"-"]||[self.strhasPrefix:@"*"]||[self.strhasPrefix:@"/"]) {

[self.strsetString:@""];

}

[self.strappendString:[sendercurrentTitle]];

self.label.text =self.str;

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

}

//inputNum,saveNum,outputNum,jumpNum;

- (void)two:(id)sender//按下符号键时调用的函数

{

[self.strsetString:@""];

[self.strappendString:[sendercurrentTitle]];

self.label.text = [NSStringstringWithString:str];

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

{

self.saveNum =self.inputNum;

self.jumpNum =1;

}

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

{

self.saveNum =self.inputNum;

self.jumpNum =2;

}

elseif([self.strhasPrefix:@"*"])

{

self.saveNum =self.inputNum;

self.jumpNum =3;

}

elseif([self.strhasPrefix:@"/"])

{

self.saveNum =self.inputNum;

self.jumpNum =4;

}

-(void) go:(id)sender

{

if (self.jumpNum ==1) {

self.outputNum =self.saveNum + [self.label.textdoubleValue];

self.label.text = [NSStringstringWithFormat:@"%f",self.outputNum];//现实计算结果

self.inputNum = [self.label.textdoubleValue];//保证连加

self.outputNum =0;

[self.strsetString:@""];//保证每次结果输出后继续计算，不需要清除，str存数字、运算符的

}

elseif (self.jumpNum ==2) {

self.outputNum =self.saveNum - [self.label.textdoubleValue];

self.label.text = [NSStringstringWithFormat:@"%f",self.outputNum];//现实计算结果

self.inputNum = [self.label.textdoubleValue];//

self.outputNum =0;

[self.strsetString:@""];//保证每次结果输出后继续计算，不需要清除，str存数字、运算符的

}

elseif (self.jumpNum ==3) {

self.outputNum =self.saveNum * [self.label.textdoubleValue];

self.label.text = [NSStringstringWithFormat:@"%f",self.outputNum];//现实计算结果

self.inputNum = [self.label.textdoubleValue];//

self.outputNum =0;

[self.strsetString:@""];//保证每次结果输出后继续计算，不需要清除，str存数字、运算符的

}

elseif (self.jumpNum ==4) {

self.outputNum =self.saveNum / [self.label.textdoubleValue];

self.label.text = [NSStringstringWithFormat:@"%f",self.outputNum];//现实计算结果

self.inputNum = [self.label.textdoubleValue];//

self.outputNum =0;

[self.strsetString:@""];//保证每次结果输出后继续计算，不需要清除，str存数字、运算符的

}

-(void) clean:(id)sender

{

[self.strsetString:@""];

self.inputNum =0;

self.saveNum =0;

self.outputNum =0;

self.label.text =@"0";

}

-(void)back:(id)sender//回退一位

{

if (![self.label.textisEqualToString:@""] && ![self.strisEqualToString:@""]) {

[self.strdeleteCharactersInRange:NSMakeRange(self.str.length-1,1)];

self.label.text = [NSStringstringWithString:self.str];

}

- (void)didReceiveMemoryWarning//系统自带，当机器内存不够时释放内存，正常情况不会调用

{

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end

文件到此结束，

运行程序出现如下界面：

0 0