UIPageControl圆点

@property(nonatomic) NSInteger numberOfPages; // default is 0
@property(nonatomic) NSInteger currentPage; // default is 0. value pinned to 0..numberOfPages-1

@property(nonatomic) BOOL hidesForSinglePage; // hide the the indicator if there is only one page. default is NO

@property(nonatomic) BOOL defersCurrentPageDisplay; // if set, clicking to a new page won't update the currently displayed page until -updateCurrentPageDisplay is called. default is NO

• (void)updateCurrentPageDisplay; // update page display to match the currentPage. ignored if defersCurrentPageDisplay is NO. setting the page value directly will update immediately

• (CGSize)sizeForNumberOfPages:(NSInteger)pageCount; // returns minimum size required to display dots for given page count. can be used to size control if page count could change

@property(nullable, nonatomic,strong) UIColor *pageIndicatorTintColor NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
@property(nullable, nonatomic,strong) UIColor *currentPageIndicatorTintColor