iOS 简易计算器纯代码

把计算器里的方法封装一个类

#import <Foundation/Foundation.h>

@interface CaculatorBrain : NSObject

- (void)pushOperation:(NSString *)operation;

- (double)result:(BOOL)secondEq;

- (void)zero;

- (void)pushNumberInStack:(double)aDouble andBool:(BOOL)aBool;

@end

#import "CaculatorBrain.h"

@class MxlJisuanqiViewController;

@interface CaculatorBrain()

@property (strong,nonatomic)NSMutableArray *operandStack;

@property (assign,nonatomic)unichar symbol;

@property (weak,nonatomic)MxlJisuanqiViewController *controller;

@property (assign,nonatomic)double secondNumber;

@end

@implementation CaculatorBrain

- (NSMutableArray *)operandStack

{

if (!_operandStack) {

_operandStack = [NSMutableArray arrayWithCapacity:3];

}

return _operandStack;

}

- (double)outANumber

{

double number = [[self.operandStack lastObject]doubleValue];

if ([self.operandStack lastObject]){

[self.operandStack removeLastObject];

}

return number;

}

- (double)result:(BOOL)secondEq

{

NSString *opera = [NSString stringWithFormat:@"%c",self.symbol];

if (!secondEq){

if ([self.operandStack count] >1 ){

double number2 = [self outANumber];

double number1 = [self outANumber];

double result = 0;

if ([opera isEqualToString:@"+"]) result = number1 + number2;

else if ([@"-" isEqualToString:opera]) result = number1 - number2;

else if ([opera isEqualToString:@"×"]) result = number1 * number2;

else if ([opera isEqualToString:@"÷"])

{

if (number2 == 0) {

}else

{

result = number1 / number2;

}

}else if ([opera isEqualToString:@""])

{

return result = number1;

}

return result;

}

else

{

[self zero];

return 0;

}

}else {

double number = [self outANumber];

double result = 0;

if ([opera isEqualToString:@"+"]) result = number + self.secondNumber;

else if ([@"-" isEqualToString:opera]) result = number - self.secondNumber;

else if ([opera isEqualToString:@"×"]) result = number * self.secondNumber;

else if ([opera isEqualToString:@"÷"])

{

if (self.secondNumber == 0) {

}else

{

result = number / self.secondNumber;

}

return result;

}

- (void)zero {

[self.operandStack removeAllObjects];

}

- (void)pushNumberInStack:(double)aDouble andBool:(BOOL)aBool {

double number = aDouble;

NSNumber *operand = [NSNumber numberWithDouble:number];

[self.operandStack addObject:operand];

if(!aBool) {

self.secondNumber = [[self.operandStack lastObject]doubleValue];}

}

- (void)pushOperation:(NSString *)operati

{

self.symbol = [operati characterAtIndex:0];

}

@end

在计算器界面里

在.h 文件里

#import <UIKit/UIKit.h>

@interface MxlJisuanqiViewController : UIViewController

@property (nonatomic,retain)NSString *disStr;

@end

在.m 文件里

#import "MxlJisuanqiViewController.h"

#import "CaculatorBrain.h"

@interface MxlJisuanqiViewController ()

@property (nonatomic, retain) UILabel *display;

@property BOOL isUseInEnteringANumber;

@property (nonatomic)CaculatorBrain *brain;

@property BOOL isContinue;

@property BOOL secondEqual;

@property BOOL firstEqual;

@property (nonatomic,retain)NSUserDefaults*userDefaults;

@end

@implementation MxlJisuanqiViewController

@synthesize userDefaults;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

{

self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

if (self) {

userDefaults = [NSUserDefaults standardUserDefaults];

}

return self;

}

- (CaculatorBrain *)brain

{

if (!_brain) {

_brain = [CaculatorBrain new];

}

return _brain;

}

- (void)viewDidLoad

{

[super viewDidLoad];

NSArray *familyNames =[[NSArray alloc]initWithArray:[UIFont familyNames]];

NSArray *fontNames;

NSInteger indFamily, indFont;

NSLog(@"[familyNames count]===%d",[familyNames count]);

for(indFamily=0;indFamily<[familyNames count];++indFamily)

{

NSLog(@"Family name: %@", [familyNames objectAtIndex:indFamily]);

fontNames =[[NSArray alloc]initWithArray:[UIFont fontNamesForFamilyName:[familyNames objectAtIndex:indFamily]]];

for(indFont=0; indFont<[fontNames count]; ++indFont)

{

NSLog(@"Font name: %@",[fontNames objectAtIndex:indFont]);

}

// titleView的label

UILabel *titleLab = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 30)];

titleLab.text = @"计算器";

titleLab.font = [UIFont fontWithName:@"Helvetica-Bold" size:18];

titleLab.textColor = [UIColor whiteColor];

titleLab.textAlignment = NSTextAlignmentCenter;

self.navigationItem.titleView = titleLab;

self.display = [[UILabel alloc]initWithFrame:CGRectMake(0, 64, 320, 92)];

self.display.font = [UIFont systemFontOfSize:40.0f];

self.display.textAlignment = NSTextAlignmentRight;

self.display.text = self.disStr;

// self.display.text = [userDefaults objectForKey:@"tf2"];

NSLog(@"%@",self.display.text);

self.display.backgroundColor = [UIColor colorWithRed:236/255. green:236/255. blue:236/255. alpha:1];

[self.view addSubview:self.display];

NSArray *shuziArr = @[@"AC",@"-",@"+",@"7",@"8",@"9",@"4",@"5",@"6",@"1",@"2",@"3",@"0",@".",@"00"];

for(int i=0; i<5; i++) {

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

UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];

if (isPhone5) {

btn.frame = CGRectMake(80*j, 156+83*i, 80, 83);

}else

{

btn.frame = CGRectMake(80*j, 156+65*i, 80, 65);

}

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

if (i ==0 ) {

if (j ==0) {

[btn addTarget:self action:@selector(zeroPressed:) forControlEvents:UIControlEventTouchUpInside];

}else

{

[btn addTarget:self action:@selector(operationPressed:) forControlEvents:UIControlEventTouchUpInside];

}

btn.backgroundColor = [UIColor colorWithRed:120/255. green:193/255. blue:42/255. alpha:0.76];

// btn.backgroundColor = [UIColor lightGrayColor];

}else

{

btn.backgroundColor = [UIColor colorWithRed:236/255. green:236/255. blue:236/255. alpha:1];

[btn addTarget:self action:@selector(digitPressed:) forControlEvents:UIControlEventTouchUpInside];

}

btn.titleLabel.font= [UIFont fontWithName:@"HelveticaNeue-Thin" size:25.0];

// btn.titleLabel.font = [UIFont systemFontOfSize:25.0f];

[btn setTitle:[shuziArr objectAtIndex:3*i+j] forState:UIControlStateNormal];

// [btn setTitleShadowColor:[UIColor redColor] forState:UIControlStateSelected];

btn.tag = 3*i+j;

[self.view addSubview:btn];

}

NSArray *yunsuanArr =@[@"÷",@"×",@"=",@"OK"];

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

UIButton *buttons = [UIButton buttonWithType:UIButtonTypeRoundedRect];

if (i ==3) {

if (isPhone5) {

buttons.frame = CGRectMake(240, 156+83*i, 80, 166);

}else

{

buttons.frame = CGRectMake(240, 156+65*i, 80, 130);

}

[buttons addTarget:self action:@selector(okBtn:) forControlEvents:UIControlEventTouchUpInside];

buttons.backgroundColor = [UIColor colorWithRed:120/255. green:193/255. blue:42/255. alpha:0.76];

// buttons.backgroundColor = [UIColor lightGrayColor];

}else if(i ==2)

{

if (isPhone5) {

buttons.frame = CGRectMake(240, 156+83*i, 80, 83);

}else

{

buttons.frame = CGRectMake(240, 156+65*i, 80, 65);

}

[buttons addTarget:self action:@selector(equalR) forControlEvents:UIControlEventTouchUpInside];

buttons.backgroundColor =[UIColor colorWithRed:120/255. green:193/255. blue:42/255. alpha:0.76];

// buttons.backgroundColor = [UIColor lightGrayColor];

// [buttons setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

// buttons.titleLabel.font = [UIFont fontWithName:@"Copperplate" size:25];

// [buttons setTitle:[yunsuanArr objectAtIndex:i] forState:UIControlStateNormal];

}

else

{

if (isPhone5) {

buttons.frame = CGRectMake(240, 156+83*i, 80, 83);

}else

{

buttons.frame = CGRectMake(240, 156+65*i, 80, 65);

}

buttons.backgroundColor = [UIColor colorWithRed:120/255. green:193/255. blue:42/255. alpha:0.76];

// buttons.backgroundColor = [UIColor lightGrayColor];

[buttons addTarget:self action:@selector(operationPressed:) forControlEvents:UIControlEventTouchUpInside];

}

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

buttons.titleLabel.font = [UIFont fontWithName:@"HelveticaNeue-Thin" size:25.0];

// buttons.titleLabel.font = [UIFont systemFontOfSize:25.0f];

[buttons setTitle:[yunsuanArr objectAtIndex:i] forState:UIControlStateNormal];

[self.view addSubview:buttons];

}

for (int i = 0; i<5; i++) {

UIImageView *imageview = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"divider1.png"]];

if (i ==4) {

if (isPhone5) {

imageview.frame = CGRectMake(0, 155.6+83*i, 240, 1.1);

}else

{

imageview.frame = CGRectMake(0, 155.6+65*i, 240, 1.1);

}

}else

{

if (isPhone5) {

imageview.frame = CGRectMake(0, 155.6+83*i, 320, 1.1);

}else

{

imageview.frame = CGRectMake(0, 155.6+65*i, 320, 1.1);

}

[self.view addSubview:imageview];

}

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

UIView *lineView = [[UIView alloc] init ];

if (i ==1) {

if (isPhone5) {

lineView.frame =CGRectMake(80*i+80, 156.0f, 0.60f, 415.0f);

}else

{

lineView.frame =CGRectMake(80*i+80, 156.0f, 0.60f, 330.0f);

}

}else

if (isPhone5) {

lineView.frame =CGRectMake(80*i+80, 156.0f, 0.60f, 415.0f);

}else

{

lineView.frame =CGRectMake(80*i+80, 156.0f, 0.60f, 330.0f);

} [lineView setBackgroundColor:[UIColor lightGrayColor]];

[self.view addSubview:lineView];

}

-(void)viewWillAppear:(BOOL)animated

{

[super viewWillAppear:YES];

self.navigationItem.hidesBackButton = YES;

}

-(void)viewWillDisappear:(BOOL)animated

{

self.display.text = @"";

}

／／点击操作符号

-(void)operationPressed:(UIButton*)sender

{

self.firstEqual = YES;

_secondEqual = NO;

if(_isContinue) [self equalR];

[self.brain pushOperation:sender.currentTitle];

[self numberInBrain];

_isContinue = YES;

}

- (void)numberInBrain

{

_isUseInEnteringANumber = NO;

[self.brain pushNumberInStack:[self.display.text doubleValue] andBool:self.secondEqual];

}

／／清空

-(void)zeroPressed:(id)sender

{

self.display.text = @"0";

[self.brain zero];

_isContinue = NO;

_isUseInEnteringANumber = NO;

[self.brain pushNumberInStack:0.0 andBool:NO];

self.secondEqual = NO;

self.firstEqual = NO;

}

／／点击数字按钮

-(void)digitPressed:(UIButton*)sender

{

_secondEqual = NO;

NSString *digit = sender.currentTitle;

if (_isUseInEnteringANumber == YES)

{

self.display.text = [self.display.text stringByAppendingString:digit];

}

else {

if ([digit isEqualToString:@"0"]) {

self.display.text = @"0";

_isUseInEnteringANumber = NO;

}else if ([digit isEqualToString:@"."])

{

self.display.text = @"0.";

_isUseInEnteringANumber = YES;

}

else

{

self.display.text = digit;

_isUseInEnteringANumber = YES;

}

NSLog(@"%@",digit);

}

／／点击等号

-(void)equalR

{

if (self.firstEqual) {

_isContinue = NO;

[self numberInBrain];

double resultNumber = [self.brain result:_secondEqual];

NSLog(@"%e",resultNumber);

NSMutableString *resultStr = [NSMutableString stringWithFormat:@"%lg",resultNumber];

NSLog(@"%@",resultStr);

// NSMutableString *resultStr = [NSMutableString stringWithFormat:@"%lf",resultNumber];

if(resultNumber>1000000000){

int count = 0;

while (resultNumber >=10) {

resultNumber/= 10;

count++;

}

[resultStr deleteCharactersInRange:NSMakeRange(0, [resultStr length])];

[resultStr appendFormat:@"%lg",resultNumber];

[resultStr appendFormat:@" E%d",count];

}

self.display.text = resultStr;

_secondEqual = YES;

}else {

NSLog(@"right!");

double resultNumber = [self.display.text doubleValue];

NSMutableString *resultStr = [NSMutableString stringWithFormat:@"%lg",resultNumber];

if(resultNumber>1000000000){

double count = 0.0;

while (resultNumber >=10) {

resultNumber /= 10.0;

count += 1.0;

}

[resultStr deleteCharactersInRange:NSMakeRange(0, [resultStr length])];

[resultStr appendFormat:@"%lg",resultNumber];

[resultStr appendFormat:@"e%g",count];

}

self.display.text = resultStr;

// [resultStr deleteCharactersInRange:NSMakeRange(0, [resultStr length])];

}

self.firstEqual = YES;

}

-(void)okBtn:(id)sender

{

[userDefaults setObject:self.display.text forKey:@"value"];

[self.navigationController popViewControllerAnimated:YES];

}

- (void)didReceiveMemoryWarning

{

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end

这个计算器没有实现优先级的比较。有做出来的求教。。。谢谢

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