iOS实现简单计算器小功能
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本文实例为大家分享了iOS实现简单计算器小功能的具体代码，供大家参考，具体内容如下
SimpleCaculatorViewController.h
//
// SimpleCaculatorViewController.h
// SimpleCaculator
//
// Created by LI Junui on 14-2-12.
// Copyright (c) 2014年 LEE JUNHUI. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface SimpleCaculatorViewController : UIViewController
@property (weak, nonatomic) IBOutlet UILabel *displayScreen;
- (IBAction)numberBtnClick:(UIButton *)sender;
- (IBAction)clearDS:(UIButton *)sender;
- (IBAction)caculate:(UIButton *)sender;
- (IBAction)hint:(UIButton *)sender;
- (IBAction)act:(UIButton *)sender;
- (IBAction)clearBack:(UIButton *)sender;
@property(assign, nonatomic) BOOL isUserInputingNumber;
@property(assign, nonatomic) int num1;
@property(assign, nonatomic) int num2;
@property(assign, nonatomic) int tagForAct;
@endSimpleCaculatorViewController.m
//
// SimpleCaculatorViewController.m
// SimpleCaculator
//
// Created by LI Junui on 14-2-12.
// Copyright (c) 2014年 LEE JUNHUI. All rights reserved.
//
#import "SimpleCaculatorViewController.h"
@interface SimpleCaculatorViewController ()
@end
@implementation SimpleCaculatorViewController
//记录数字按钮点击事件
- (IBAction)numberBtnClick:(UIButton *)sender {
if(self.isUserInputingNumber){
int re = [_displayScreen.text intValue] * 10 + [sender.currentTitle intValue];
_displayScreen.text = [NSString stringWithFormat:@"%d",re];
} else{
[_displayScreen setText:sender.currentTitle];
_isUserInputingNumber = YES;//因为第一次进入程序会输入数字，因此为YES
}
}
//清零操作
- (IBAction)clearDS:(UIButton *)sender {
_displayScreen.text = @"0";
_isUserInputingNumber = NO;//表示没有再输入了
}
//得到结果
- (IBAction)caculate:(UIButton *)sender {
int re = 0;
_num2 = [_displayScreen.text intValue];
switch (_tagForAct) {
case 1: //加法
re = _num1 + _num2;
break;
case 2: //减法
re = _num1 - _num2;
break;
case 3: //乘法
re = _num1 * _num2;
break;
case 4: //除法
re = _num1 / _num2;
break;
}
_displayScreen.text = [NSString stringWithFormat:@"=%d", re];
_num1 = 0;
_num2 = 0;
}
//弹出提示对话框
- (IBAction)hint:(UIButton *)sender {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"温馨提示" message:@"本计算器由LJH出品" delegate:self cancelButtonTitle:@"返回" otherButtonTitles: nil];
[alert show];
}
//进行四则运算
- (IBAction)act:(UIButton *)sender {
//1.得到_displayScreen上的数字
_num1 = [_displayScreen.text intValue];
_displayScreen.text = sender.currentTitle;
_isUserInputingNumber =YES;
switch (sender.tag) {
case 1: //加法
_tagForAct = 1;
break;
case 2: //减法
_tagForAct = 2;
break;
case 3: //乘法
_tagForAct = 3;
break;
case 4: //除法
_tagForAct = 4;
break;
}
}
//进行回删操作
- (IBAction)clearBack:(UIButton *)sender {
int length = [_displayScreen.text length];
int temp = [_displayScreen.text intValue];
temp = temp/length;
}
@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编程网。
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