UI基础--UIStepper步进器

直接上代码喽:

.h

@interface ViewController : UIViewController

{
    //声明步进器对象
    UIStepper *_stepper;
}

//声明属性
@property (nonatomic, strong) UIStepper *stepper;

@end

.m

#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