本文实例为大家分享了iOS实现简易的计算器的具体代码，供大家参考，具体内容如下
初步接触视图，制作了一个简易的计算器，基本上简单的计算是没有问题的，不是很完美，可能还有一些bug，再接再厉。
//
// ViewController.m
// 计算器
//
// Created by ma c on 15/8/25.
// Copyright (c) 2015年 bjsxt. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UITextField *ResultField;
@property(nonatomic,assign)CGFloat temp;
@property(nonatomic,assign)CGFloat num1;
@property(nonatomic,assign)CGFloat num2;
@property(nonatomic,strong)NSMutableString *string;
@property(nonatomic,strong)NSArray *arr;
@end
@implementation ViewController
- (IBAction)buttonClear:(UIButton *)sender
{
[_string setString:@""]; //重新开始计算,文本框置空
self.ResultField.text = _string;
}
- (IBAction)button7:(UIButton *)sender
{
[_string appendString:@"7"];
self.ResultField.text = _string;
}
- (IBAction)button8:(UIButton *)sender
{
[_string appendString:@"8"];
self.ResultField.text = _string;
}
- (IBAction)button9:(UIButton *)sender
{
[_string appendString:@"9"];
self.ResultField.text = _string;
}
- (IBAction)button4:(UIButton *)sender
{
[_string appendString:@"4"];
self.ResultField.text = _string;
}
- (IBAction)button5:(UIButton *)sender
{
[_string appendString:@"5"];
self.ResultField.text = _string;
}
- (IBAction)button6:(UIButton *)sender
{
[_string appendString:@"6"];
self.ResultField.text = _string;
}
- (IBAction)button1:(UIButton *)sender
{
[_string appendString:@"1"];
self.ResultField.text = _string;
}
- (IBAction)button3:(UIButton *)sender
{
[_string appendString:@"3"];
self.ResultField.text = _string;
}
- (IBAction)button2:(UIButton *)sender
{
[_string appendString:@"2"];
self.ResultField.text = _string;
}
- (IBAction)button0:(UIButton *)sender
{
[_string appendString:@"0"];
self.ResultField.text = _string;
}
- (IBAction)buttonPoint:(UIButton *)sender
{
[_string appendString:@"."];
self.ResultField.text = _string;
}
//触发算数运算事件
- (IBAction)buttonDiv:(UIButton *)sender
{
[_string appendString:@"/"];
self.ResultField.text = _string;
}
- (IBAction)buttonMul:(UIButton *)sender
{
[_string appendString:@"*"];
self.ResultField.text = _string;
}
- (IBAction)buttonSub:(UIButton *)sender
{
[_string appendString:@"-"];
self.ResultField.text = _string;
}
- (IBAction)buttonAdd:(UIButton *)sender
{
[_string appendString:@" "];
self.ResultField.text = _string;
}
//做结果运算操作
- (IBAction)buttonEqual:(UIButton *)sender
{
for(int i=0; i<[_string length]; i )
{
self.arr = [[NSArray alloc]init];
//只输入一个数,不做运算
if([_string length] == 1)
{
self.temp = [_string doubleValue];
break;
}
//做加法运算
if([_string characterAtIndex:i] == ' ')
{
self.arr = [_string componentsSeparatedByString:@" "];
self.num1 = [self.arr[0] doubleValue];
self.num2 = [self.arr[1] doubleValue];
self.temp = self.num1 self.num2;
break;
}
//做减法运算
if([_string characterAtIndex:(i 1)] == '-')
{
self.arr = [_string componentsSeparatedByString:@"-"];
if([self.arr count] == 2)
{
self.num1 = [self.arr[0] doubleValue];
self.num2 = [self.arr[1] doubleValue];
self.temp = self.num1 - self.num2;
}
else
{
self.num1 = [self.arr[1] doubleValue];
self.num2 = [self.arr[2] doubleValue];
self.temp = -(self.num1 self.num2);
}
break;
}
//做除法运算
if([_string characterAtIndex:i] == '/')
{
self.arr = [_string componentsSeparatedByString:@"/"];
self.num1 = [self.arr[0] doubleValue];
self.num2 = [self.arr[1] doubleValue];
self.temp = self.num1 / self.num2;
break;
}
//做乘法运算
if([_string characterAtIndex:i] == '*')
{
self.arr = [_string componentsSeparatedByString:@"*"];
self.num1 = [self.arr[0] doubleValue];
self.num2 = [self.arr[1] doubleValue];
self.temp = self.num1 * self.num2;
break;
}
}
//输出结果
[_string setString:[NSString stringWithFormat:@"%.2f",self.temp]];
self.ResultField.text = _string;
}
- (void)viewDidLoad {
[super viewDidLoad];
//创建一个可变的字符串
_string = [NSMutableString stringWithCapacity:20];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持Devmax。