标签：c style class blog code http
代码
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//// CalculatorViewController.m// Calculator//// Created by sskset on 5/28/14.// Copyright (c) 2014 shanke. All rights reserved.//#import "CalculatorViewController.h"@interface
CalculatorViewController ()@property
(weak, nonatomic) IBOutlet
UITextField *resultText;@property
(nonatomic) BOOL
isProcessing;@property
(nonatomic) NSMutableArray
*numberStack;@property
(nonatomic) NSMutableArray
*operandStack;@end@implementation
CalculatorViewController-(NSMutableArray
*)operandStack{ if(!_operandStack) _operandStack = [[NSMutableArray
alloc] init]; return
_operandStack;}-(NSMutableArray
*)numberStack{ if(!_numberStack) _numberStack = [[NSMutableArray
alloc] init]; return
_numberStack;}- (IBAction)operandPressed:(UIButton *)sender { if([self
isAvailableToCalculate]) { [self
doCalculate]; } else { [self.numberStack addObject:self.resultText.text]; } [self.operandStack addObject:sender.titleLabel.text]; self.isProcessing = NO;}- (IBAction)numberPressed:(UIButton *)sender { if
(self.isProcessing) { self.resultText.text = [self.resultText.text stringByAppendingString:sender.titleLabel.text]; } else{ self.resultText.text = sender.titleLabel.text; self.isProcessing = YES; }}- (IBAction)resetPressed:(id)sender { self.isProcessing = NO; [self.numberStack removeAllObjects]; [self.operandStack removeAllObjects]; self.resultText.text = @"0";}-(void)doCalculate{ NSString
*operand = [self.operandStack lastObject]; if(operand) { NSString
*outObject = [self.numberStack lastObject]; int
outputInteger = outObject ? [outObject intValue] : 0; [self.numberStack removeLastObject]; int
resultInteger = 0; if
([operand isEqualToString:@"+"]) { resultInteger = [self.resultText.text intValue] + outputInteger; } else
if ([operand isEqualToString:@"-"]) { resultInteger = outputInteger - [self.resultText.text intValue]; } else
if ([operand isEqualToString:@"*"]) { resultInteger = outputInteger * [self.resultText.text intValue]; } else { resultInteger = [self.resultText.text intValue] == 0 ? 0 : outputInteger / [self.resultText.text intValue]; } [self.operandStack removeLastObject]; NSString
*resultString = [NSString
stringWithFormat:@"%d", resultInteger]; self.resultText.text = resultString; [self.numberStack addObject:resultString]; }}-(BOOL)isAvailableToCalculate{ return
[self.operandStack lastObject] != nil;}- (IBAction)enterPressed:(id)sender{ [self
doCalculate];}@end |
界面
Objective C - 3 - 实现一个计算器,布布扣,bubuko.com
标签：c style class blog code http
原文地址：http://www.cnblogs.com/sskset/p/3758236.html
