iOS中步进控件的简单使用
初始化控件
UIStepper * step = [[UIStepper alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
设置控制器值是否连续触发变化
@property(nonatomic,getter=isContinuous) BOOL continuous;
若设置为YES，则长按会连续触发变化，若设置为NO，只有在按击结束后，才会触发。
设置长按是否一直触发变化
@property(nonatomic) BOOL autorepeat;
若设置为YES，则长按值会一直改变，若设置为NO，则一次点击只会改变一次值
设置控制器的值是否循环(到达边界后，重头开始，默认为NO)
@property(nonatomic) BOOL wraps;
设置控制器的值
@property(nonatomic) double value;
设置控制器的最大值和最小值
@property(nonatomic) double minimumValue;//默认为0
@property(nonatomic) double maximumValue; //默认为100
设置控制器的步长
@property(nonatomic) double stepValue;
设置控制器风格颜色
@property(nonatomic,retain) UIColor *tintColor;
设置控制器背景图片
- (void)setBackgroundImage:(UIImage*)image forState:(UIControlState)state;
获取背景图片
- (UIImage*)backgroundImageForState:(UIControlState)state;
通过左右按钮的状态设置分割线的图片
- (void)setDividerImage:(UIImage*)image forLeftSegmentState:(UIControlState)leftState rightSegmentState:(UIControlState)rightState;
获取分割线图片
- (UIImage*)dividerImageForLeftSegmentState:(UIControlState)state rightSegmentState:(UIControlState)state;
设置和获取加号按钮的图片
- (void)setIncrementImage:(UIImage *)image forState:(UIControlState)state;
- (UIImage *)incrementImageForState:(UIControlState)state;
设置和获取减号按钮的图片
- (void)setDecrementImage:(UIImage *)image forState:(UIControlState)state;
- (UIImage *)decrementImageForState:(UIControlState)state;
