源代码(.m文件)

#import "ZKJAppDelegate.h"

@interface ZKJAppDelegate ()

@property (retain,nonatomic)UIView *containView;

@property (retain,nonatomic) UIButton *button;

@property (retain,nonatomic) UILabel *label;

@property (retain,nonatomic) NSMutableString *string;//保存字符

@property (assign,nonatomic)double num1,num2,num3,num4;

//num1保存输入数值,2,保存运算前数值,3是运算结果,4判断进行何种运算

@end

@implementation ZKJAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    self.window = [[UIWindowalloc] initWithFrame:[[UIScreenmainScreen] bounds]];

    // Override point for customization after application launch.

    self.containView = [[UIViewalloc] initWithFrame:CGRectMake(0,0, 320,568)];

    self.containView.backgroundColor = [UIColorclearColor];

    [self.windowaddSubview:self.containView];

    [self.containViewrelease];

    self.label = [[UILabelalloc] initWithFrame:CGRectMake(30,40, 190, 50)];

    self.label.backgroundColor = [UIColorlightGrayColor];

    self.label.textAlignment = UITextAlignmentLeft;

    self.label.font = [UIFont systemFontOfSize:32];

    [self.containViewaddSubview:self.label];

    [self.labelrelease ];

    UIButton *backButton = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

    backButton.backgroundColor = [UIColorlightGrayColor];

    [backButton setFrame:CGRectMake(225,40, 60, 50)];

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

    [backButton addTarget:selfaction:@selector(backClick:)forControlEvents:UIControlEventTouchUpInside];

    [self.containViewaddSubview:backButton];

    //添加1 - 9 的按钮

    NSArray *array = [NSArrayarrayWithObjects:@"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 = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

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

            self.button.backgroundColor = [UIColorlightGrayColor];

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

            [self.containViewaddSubview:self.button];

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

        }

    }

    //添加零

    UIButton *button0 = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

    [button0 setFrame:CGRectMake(30,345, 60, 60)];

    button0.backgroundColor = [UIColorlightGrayColor];

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

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

    [self.containViewaddSubview:button0];

    //添加点

    UIButton *point = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

    [point setFrame:CGRectMake(95,345, 60, 60)];

    point.backgroundColor = [UIColorlightGrayColor];

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

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

    [self.containViewaddSubview:point];

//    [point release];

    //添加删除

    UIButton *deleteButton = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

    [deleteButton setFrame:CGRectMake(160,345, 60, 60)];

    deleteButton.backgroundColor = [UIColorlightGrayColor];

    [deleteButton setTitle:@"delete"forState:UIControlStateNormal];

    [deleteButton addTarget:selfaction:@selector(deleteClick:)forControlEvents:UIControlEventTouchUpInside];

    [self.containViewaddSubview:deleteButton];

//    [backButton release];

    //添加运算符

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

    for (int i =0 ; i < 4; i++ ) {

        UIButton *button = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

        [button setFrame:CGRectMake(225,150 + 65 * i,60 , 60)];

        button.backgroundColor = [UIColorlightGrayColor];

        [button setTitle:array1[i]forState:UIControlStateNormal];

        [self.containViewaddSubview:button];

        [button addTarget:selfaction:@selector(two:)forControlEvents:UIControlEventTouchUpInside];

//        [button release];

    }

    //添加等号

    UIButton *istoButton = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

    [istoButton setFrame:CGRectMake(30,100, 255, 40)];

    istoButton.backgroundColor = [UIColorlightGrayColor];

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

    [istoButton addTarget:selfaction:@selector(isto: )forControlEvents:UIControlEventTouchUpInside];

    [self.containViewaddSubview:istoButton];

    self.string = [[NSMutableStringalloc] init];

    self.window.backgroundColor = [UIColorwhiteColor];

    [self.windowmakeKeyAndVisible];

    return YES;

}

//键盘输入 数字事件

- (void)one:(id)sender {

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

        [self.stringsetString:@""];

    }

    //*********

    [self.stringappendString:[sender currentTitle]];//数字连续输入;;;

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

    self.num1 = [self.label.textdoubleValue];//将字符串转化为基本数据类型并赋给num1;

    NSLog(@"%f",self.num1);

}

//运算符事件

- (void)two:(id)sender{

    [self.stringsetString:@""];

    //*********

    [self.stringappendString:[sender currentTitle]];

    self.label.text =self.string;

    if ([self.stringhasPrefix:@"+"]) {

        self.num2 =self.num1;

        self.num4 =1;

    } else if ([self.stringhasPrefix:@"-"]){

        self.num2 =self.num1;

        self.num4 =2;

    } else if ([self.stringhasPrefix:@"*"]) {

        self.num2 =self.num1;

        self.num4 =3;

    } else if ([self.stringhasPrefix:@"/"]) {

        self.num2 =self.num1;

        self.num4 =4;

    }

}

//等号事件

- (void)isto:(id)sender{

    if (self.num4 ==1) {

        self.num3 =self.num2 + [self.label.textdoubleValue];

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

//        self.num3 = 0;

        [self.stringsetString:@""];

    } else if (self.num4 ==2){

        self.num3 =self.num2 - [self.label.textdoubleValue];

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

//        self.num3 = 0;

    } else if (self.num4 ==3){

        self.num3 =self.num2 * [self.label.textdoubleValue];

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

//        self.num3 = 0;

    } else if (self.num4 ==4) {

        self.num3 =self.num2 / [self.label.textdoubleValue];

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

//        self.num3 = 0;

    }

}

//全部删除的响应事件

- (void)deleteClick:(id)sender{

    [self.stringsetString:@"" ];

//    [self.string appendString:[sender currentTitle]];

    self.label.text =self.string;

}

//消除一个数的响应事件

- (void)backClick:(id)sender{

//    NSMutableString

    if ([self.stringlength] > 0) {

        NSInteger n = [self.stringlength];

        [self.stringdeleteCharactersInRange:NSMakeRange(n -1, 1)];

        self.label.text =self.string;

    }

}

- (void)applicationWillResignActive:(UIApplication *)application

{

    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.

    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.

}

- (void)applicationDidEnterBackground:(UIApplication *)application

{

    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 

    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.

}

- (void)applicationWillEnterForeground:(UIApplication *)application

{

    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.

}

- (void)applicationDidBecomeActive:(UIApplication *)application

{

    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.

}

- (void)applicationWillTerminate:(UIApplication *)application

{

    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.

}

- (void)dealloc{

    [self.windowrelease];

    [super dealloc];

}

@end