Xcode 简易计算器 （修改版）

主要代码：

#import "ViewController.h"
#import "jsq.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UILabel *label;            

@end
float n = 10;
float resurt;

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    jsqq = [[jsq alloc] init];  //初始化对象jsqq
   
    UIImage *image1 = [UIImage imageNamed:@"1.png"];
    UIImage *image2 = [UIImage imageNamed:@"2.png"];
    UIImage *image3 = [UIImage imageNamed:@"3.png"];
    UIImage *image4 = [UIImage imageNamed:@"4.png"];
    UIImageView *imageView1 = [[UIImageView alloc] initWithFrame:CGRectMake(135, 370, 180, 110)];
    NSArray *array = [NSArray arrayWithObjects:image1,image2,image3,image4, nil];
    //创建一个OC的数组，并且设置它里面的元素
    imageView1.animationDuration = 1;  //动画执行的时长，单位为秒
    imageView1.animationImages = array;  //动画图片数组
    //imageView1.animationRepeatCount = 2;//重复次数，默认为无限循环
    [imageView1 startAnimating];  //开始执行动画
    [self.view addSubview:imageView1];
}
- (IBAction)v:(UIButton *)sender {
    if(jsqq.op==0) //判断是否已经按了运算符
    {
        if (jsqq.dot == '.'){
            jsqq.op1 = sender.tag/n + jsqq.op1;
            n = n *10;
        }
        else{
        jsqq.op1 = jsqq.op1*10 + sender.tag;
        }
    self.label.text = [NSString stringWithFormat:@"%.4f",jsqq.op1];
        //将浮点数转化为字符串，并显示在label上
    }
    else {
        if (jsqq.dot == '.'){
            jsqq.op2 = sender.tag /n + jsqq.op2;
            n = n *10;
        }
        else{
            jsqq.op2 = jsqq.op2*10 + sender.tag;
        }
    self.label.text = [NSString stringWithFormat:@"%.4f",jsqq.op2];
    }
    
}
- (IBAction)c:(UIButton *)sender {
    jsqq.dot=0;
    n = 10;
    switch (sender.tag) {
        case 11:
            jsqq.op = '+';
            break;
        case 12:
            jsqq.op = '-';
            break;
        case 13:
            jsqq.op = '*';
            break;
        case 14:
            jsqq.op = '/';
            break;
        case 16:
            jsqq.op = 0;
            jsqq.op1 = 0;
            jsqq.op2 = 0;
            jsqq.dot = 0;
            n = 10;
            self.label.text =@"0";
            break;
        default:
            break;
       }
}

- (IBAction)d:(id)sender {    
    resurt = [jsqq work];
    self.label.text = [NSString stringWithFormat:@"%.4f",resurt];
    jsqq.op1 = resurt;
    jsqq.op2 = 0;
    jsqq.dot = 0;
}

- (IBAction)dot:(id)sender {
       jsqq.dot = '.';
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

实现的效果如下：