iOS开篇——UI之UIStepper （计步器）

   UIStepper * stepper = [[UIStepper alloc]initWithFrame:CGRectMake(50, 100, 150, 40)];
    
    //********最小值和最大值
    stepper.maximumValue = 100;
    stepper.minimumValue = 0;
    //设置跃迁值 ***
    stepper.stepValue = 0.1;
   
    //设置镂空颜色
    stepper.tintColor = [UIColor redColor];
    //添加点击事件
    [stepper addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventValueChanged];

- (void)onClick:(UIStepper *)stepper{
    NSLog(@"%.02lf",stepper.value);
    UILabel * label = [self.view viewWithTag:1];
    label.text = [NSString stringWithFormat:@"%0.2f",stepper.value];
    
}