objective-c制作加法计算器

#import "ViewController.h"

@interface ViewController ()
@property (nonatomic, strong)UITextField *num1TextField;
@property (nonatomic, strong)UITextField *num2TextField;
@property (nonatomic, strong)UILabel *resultLabel;
@property (nonatomic, strong)UILabel *addLabel;
@property (nonatomic, strong)UILabel *equalLabel;
@property (nonatomic, strong)UIButton *caculate;
@end

@implementation ViewController
#define kTextHeght 30
#define kTextWidth 100
#define kStartX    20
#define kStartY    50
#define kLabelWidth 30
#define kLabelHeight 30
- (void)viewDidLoad {
    [super viewDidLoad];
    
    //设置第一个文本输入框（第一
    self.num1TextField = [[UITextField alloc] initWithFrame:CGRectMake(kStartX, kStartY, kTextWidth, kTextHeght)];
    //self.num1TextField.backgroundColor = [UIColor redColor];
    self.num1TextField.borderStyle = UITextBorderStyleRoundedRect;
    self.num1TextField.keyboardType = UIKeyboardTypeNumberPad;
    [self.view addSubview:_num1TextField];
    
    //设置第二个文本输入框
    self.num2TextField = [[UITextField alloc] initWithFrame:CGRectMake(kStartX + kTextWidth + 30, kStartY, kTextWidth, kTextHeght)];
    //self.num1TextField.backgroundColor = [UIColor redColor];
    self.num2TextField.borderStyle = UITextBorderStyleRoundedRect;
    self.num2TextField.keyboardType = UIKeyboardTypeNumberPad;
    [self.view addSubview:_num2TextField];

    //设置第一个本文标签（加号）
    self.addLabel = [[UILabel alloc] initWithFrame:CGRectMake(kStartX + kTextWidth, kStartY,kLabelWidth, kLabelHeight)];
    self.addLabel.text = @"+";
    self.addLabel.textAlignment = NSTextAlignmentCenter;
    [self.view addSubview: _addLabel];
    
    //设置第二个文本标签（等号）
    self.equalLabel = [[UILabel alloc] initWithFrame:CGRectMake(kStartX + kTextWidth * 2 + kLabelWidth, kStartY,kLabelWidth, kLabelHeight)];
    self.equalLabel.text = @"=";
    self.equalLabel.textAlignment = NSTextAlignmentCenter;
    [self.view addSubview: _equalLabel];
    
    //设置第三个文本标签（现实结果）
    self.resultLabel = [[UILabel alloc] initWithFrame:CGRectMake(kStartX + kTextWidth * 2 + kLabelWidth * 2, kStartY,kLabelWidth + 20, kLabelHeight)];
     [self.view addSubview: _resultLabel];
    
    //设置计算按钮
    self.caculate = [[UIButton alloc] initWithFrame:CGRectMake(0, kStartY + kLabelHeight + 10, self.view.frame.size.width, kLabelHeight + 10)];
    [self.caculate setTitle:@"计算" forState:UIControlStateNormal];
    //设置按钮字体大小
    _caculate.titleLabel.font = [UIFont systemFontOfSize: 14.0];
    //设置按钮字体颜色
    [self.caculate setTitleColor:[UIColor blackColor]forState:UIControlStateNormal];
    [self.caculate setTitleColor:[UIColor blueColor] forState:UIControlStateHighlighted];
    [self.view addSubview:_caculate];
    [self.caculate addTarget:self action:@selector(Caculate) forControlEvents:UIControlEventTouchUpInside];
    
    
    
}

- (void) Caculate
{
    NSString *num1 = self.num1TextField.text;
    NSString *num2 = self.num2TextField.text;
    int result = [num1 intValue] + [num2 intValue];
    self.resultLabel.text = [NSString stringWithFormat:@"%d", result];
   
    [self.view endEditing:YES];
}
@end