@interface ViewController : UIViewController{//声明步进器对象UIStepper *_stepper;
}//声明属性
@property (nonatomic, strong) UIStepper *stepper;@end

#import "ViewController.h"@interface ViewController ()@property (nonatomic, strong) UILabel *label;@end@implementation ViewController//同步属性和成员变量
@synthesize stepper = _stepper;- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view, typically from a nib.
   self.view.backgroundColor = [UIColor whiteColor];//创建步进器对象UIStepper *sterper = [[UIStepper alloc]init];//设置Frame(大小为系统内设定);sterper.frame = CGRectMake(100, 100, 0, 0);//设置每次增加的数量sterper.stepValue = 1;//设置最小值(默认为0)sterper.minimumValue = 0;//设置最大值(默认为100)sterper.maximumValue = 10;//从小到大(默认为NO)sterper.wraps = YES;//设置是否重复(默认为YES)sterper.autorepeat = YES;//是否连续(默认为YES)sterper.continuous = YES;//添加到当前视图上
    [self.view addSubview:sterper];self.stepper = sterper;/**创建Label,将值显示在Label上;*/UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(50, 40, 100, 30)];label.backgroundColor = [UIColor lightGrayColor];label.textColor = [UIColor purpleColor];label.textAlignment = 1;[self.view addSubview:label];self.label = label;//添加步进器点击事件
    [sterper addTarget:self action:@selector(addCount:) forControlEvents:UIControlEventValueChanged];}
//实现步进器事件
- (void)addCount:(UIStepper *)steper{self.label.text = [NSString stringWithFormat:@"%.0f", steper.value];}- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}@end