UI 纯代码实现计算器

//  MHTAppDelegate.h

//  TestCa

//  Copyright (c) 2014年 Summer. All rights reserved.

#import <UIKit/UIKit.h>

@interface MHTAppDelegate : UIResponder <UIApplicationDelegate,UITextFieldDelegate>

@property (retain, nonatomic) UIWindow *window;

@end

//  MHTAppDelegate.m

//  TestCal

//  Copyright (c) 2014年 Summer. All rights reserved.

#import "MHTAppDelegate.h"

@interface MHTAppDelegate()

{

    UIView *_containerView;

    UIButton *_desBut1;

    UIButton *_desBut2;

    UIButton *_desBut3;

    UIButton *_desBut4;

    UILabel *_hintLine;

    UITextField *_textField;

    BOOL  _isHave;

    BOOL _isResult;

}

@property (retain, nonatomic) NSString *_str;

@property (retain, nonatomic) NSString *_number;

@end

@implementation MHTAppDelegate

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

{

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    // Override point for customization after application launch.

    //创建底层的背景视图

    _containerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 568)];

    _containerView.backgroundColor = [UIColor whiteColor];

    [self.window addSubview:_containerView];

    [_containerView release];

    //baseCalculate

    [self baseCalculate];

    //Line

    [self line];

    _isHave = NO;

    _isResult = NO;

    self.window.backgroundColor = [UIColor whiteColor];

    [self.window makeKeyAndVisible];

    return YES;

}

- (void)baseCalculate

{int j = 0;

    NSArray *calArr =@[@"C", @"+/-", @"%", @"÷", @"7", @"8", @"9", @"x", @"4", @"5", @"6", @"-", @"1", @"2", @"3", @"+", @"0", @".", @"="];

    NSInteger n = 0;

    for (int i = 0; i < 5; i++) {

        for ( j = 0; j < 4; j++) {

            if (i == 4 && j == 0) {

                _desBut1 = [UIButton buttonWithType:UIButtonTypeSystem];

                _desBut1.frame = CGRectMake(0, 488, 160, 80);

                [_desBut1 setTitle:calArr[n] forState:UIControlStateNormal];

                [_desBut1 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

                [_desBut1 addTarget:self action:@selector(numberClick:) forControlEvents:UIControlEventTouchUpInside];

                _desBut1.titleLabel.font = [UIFont fontWithName:@"AppleSDGothicNeo-Thin" size:30];

                _desBut1.backgroundColor = [UIColor whiteColor];

                [_containerView addSubview:_desBut1];

                j = 2;

                n++;

            }

            _desBut1 = [UIButton buttonWithType:UIButtonTypeSystem];

            _desBut1.frame = CGRectMake(0 + j * 80, 168 + 80 * i, 80, 80);

            [_desBut1 setTitle:calArr[n] forState:UIControlStateNormal];

            [_desBut1 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

            if (j == 3) {

                _desBut1.backgroundColor = [UIColor orangeColor];

                _desBut1.titleLabel.font = [UIFont fontWithName:@"AppleSDGothicNeo-Thin" size:30];

            }else if (i == 0){

                _desBut1.backgroundColor = [UIColor lightGrayColor];

            } else

            {

                _desBut1.backgroundColor = [UIColor whiteColor];

            }

            _desBut1.titleLabel.font = [UIFont fontWithName:@"AppleSDGothicNeo-Thin" size:30];

            [_containerView addSubview:_desBut1];

            if (n == 4 || n == 5 || n == 6 || n == 8 || n == 9 || n == 10 || n == 12 || n == 13 || n == 14 || n == 17 || n == 16) {

                [_desBut1 addTarget:self action:@selector(numberClick:) forControlEvents:UIControlEventTouchUpInside];

            }

            if (n == 0) {

                [_desBut1 addTarget:self action:@selector(clearClick:) forControlEvents:UIControlEventTouchUpInside];

            }

            if (n == 1) {

                [_desBut1 addTarget:self action:@selector(oppositeClick:) forControlEvents:UIControlEventTouchUpInside];

            }

            if (n == 2) {

                [_desBut1 addTarget:self action:@selector(percentClick:) forControlEvents:UIControlEventTouchUpInside];

            }

            if (n == 3 || n == 7 || n == 11 || n == 15 || n == 14) {

                [_desBut1 addTarget:self action:@selector(operationClick:) forControlEvents:UIControlEventTouchUpInside];

            }

            if (n == 18) {

                [_desBut1 addTarget:self action:@selector(resultClick:) forControlEvents:UIControlEventTouchUpInside];

            }

            n++;

        }

        j = 0;

    }

    NSLog(@"test:%d", n);

    [self displayTextField];

}

- (void)displayTextField

{

    _textField = [[UITextField alloc] initWithFrame:CGRectMake(0, 40, 320, 128)];

    _textField.backgroundColor = [UIColor blackColor];

    _textField.text = @"0";

    //不可写

    _textField.enabled = NO;

    _textField.delegate = self;

    _textField.textColor = [UIColor whiteColor];

    _textField.font = [UIFont fontWithName:@"AppleSDGothicNeo-Thin" size:40];

    _textField.textAlignment = NSTextAlignmentRight;

    [_containerView addSubview:_textField];

    [_textField release];

}

- (void)oppositeClick:(UIButton *)oppositeBut

{

    CGFloat num = [_textField.text floatValue];

    _textField.text = [NSString stringWithFormat:@"%g", (-num)];

}

- (void)percentClick:(UIButton *)percentBut

{

    CGFloat num = [_textField.text floatValue];

    _textField.text = [NSString stringWithFormat:@"%g", (num / 100)];

}

- (void)clearClick:(UIButton *)clearBut

{

    _textField.text = nil;

}

- (void)numberClick:(UIButton *)numBut

{

    if ( _isHave || [_textField.text isEqualToString:@"0"] || _isResult ) {

        _textField.text = @"";

        _textField.text =  [_textField.text stringByAppendingString:numBut.currentTitle];

    }else{

        _textField.text =  [_textField.text stringByAppendingString:numBut.currentTitle];

    }

    _isHave = NO;

    _isResult = NO;

      }

- (void)operationClick:(UIButton *)operationBut

{

    if ([operationBut.currentTitle isEqualToString:@"+"]) {

        self._str = [_textField.text stringByAppendingString:@"+"];

        _isHave = YES;

    } else if  ([operationBut.currentTitle isEqualToString:@"-"]) {

        self._str = [_textField.text stringByAppendingString:@"-"];

        _isHave = YES;

    } else if ([operationBut.currentTitle isEqualToString:@"x"]) {

        self._str = [_textField.text stringByAppendingString:@"x"];

        _isHave = YES;

    }else if ([operationBut.currentTitle isEqualToString:@"÷"]) {

        self._str = [_textField.text stringByAppendingString:@"÷"];

        _isHave = YES;

    }

}

- (void)resultClick:(UIButton *)resultBut

{

    NSLog(@"aa");

    if ([self._str hasSuffix:@"+"]) {

        CGFloat value1 = [self._str floatValue];

        CGFloat value2 =  [_textField.text floatValue];

        _textField.text = [NSString stringWithFormat:@"%g",(value1 + value2)];

        self._str = @"";

        _isResult = YES;

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

        CGFloat value1 = [self._str floatValue];

        CGFloat value2 =  [_textField.text floatValue];

        _textField.text = [NSString stringWithFormat:@"%g",(value1 - value2)];

        self._str = @"";

        _isResult = YES;

    }else if([self._str hasSuffix:@"x"]){

        CGFloat value1 = [self._str floatValue];

        CGFloat value2 =  [_textField.text floatValue];

        _textField.text = [NSString stringWithFormat:@"%g",(value1 * value2)];

        self._str = @"";

        _isResult = YES;

    } else if([self._str hasSuffix:@"÷"]){

        CGFloat value1 = [self._str floatValue];

        CGFloat value2 =  [_textField.text floatValue];

        _textField.text = [NSString stringWithFormat:@"%g",(value1 / value2)];

        self._str = @"";

        _isResult = YES;

    }else{

        self._str = @"";

        _isResult = YES;

    }

}

//收回键盘

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

    return YES;

}

// Line

- (void)line

{

    //Line

    for (int i = 0; i < 4; i++) {

        UILabel *hintLine = [[UILabel alloc] initWithFrame:CGRectMake(0, 248 + 80 * i, 320, 0.5)];

        hintLine.backgroundColor = [UIColor blackColor];

        [_containerView addSubview:hintLine];

        [hintLine release];

    }

    //Line

    for (int i = 0; i < 3; i++) {

        if (i == 0) {

            _hintLine = [[UILabel alloc] initWithFrame:CGRectMake(80, 168, 0.5, 320)];

            _hintLine.backgroundColor = [UIColor blackColor];

            [_containerView addSubview:_hintLine];

            [_hintLine release];

        }else{

            _hintLine = [[UILabel alloc] initWithFrame:CGRectMake(80 + i  * 80, 168, 0.5, 400)];

            _hintLine.backgroundColor = [UIColor blackColor];

            [_containerView addSubview:_hintLine];

            [_hintLine release];

        }

    }

}

- (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

{

    [_window release];

    [super dealloc];

}

@end