最近有一個文字上下滾動的需求，簡單寫了一下。

@class GYChangeTextView;

@protocol GYChangeTextViewDelegate <NSObject>

- (void)gyChangeTextView:(GYChangeTextView *)textView didTapedAtIndex:(NSInteger)index;

@end

@interface GYChangeTextView : UIView

@property (nonatomic, assign) id<GYChangeTextViewDelegate> delegate;

- (void)animationWithTexts:(NSArray *)textAry;
- (void)stopAnimation;

@end