Merge pull request #354 from WenchaoIOS/patch-1

add NS_REQUIRES_SUPER

MJRefresh/Base/MJRefreshComponent.h

@@ -68,15 +68,15 @@ typedef void (^MJRefreshComponentRefreshingBlock)();
 
 #pragma mark - 交给子类们去实现
 /** 初始化 */
-- (void)prepare;
+- (void)prepare NS_REQUIRES_SUPER;
 /** 摆放子控件frame */
-- (void)placeSubviews;
+- (void)placeSubviews NS_REQUIRES_SUPER;
 /** 当scrollView的contentOffset发生改变的时候调用 */
-- (void)scrollViewContentOffsetDidChange:(NSDictionary *)change;
+- (void)scrollViewContentOffsetDidChange:(NSDictionary *)change NS_REQUIRES_SUPER;
 /** 当scrollView的contentSize发生改变的时候调用 */
-- (void)scrollViewContentSizeDidChange:(NSDictionary *)change;
+- (void)scrollViewContentSizeDidChange:(NSDictionary *)change NS_REQUIRES_SUPER;
 /** 当scrollView的拖拽状态发生改变的时候调用 */
-- (void)scrollViewPanStateDidChange:(NSDictionary *)change;
+- (void)scrollViewPanStateDidChange:(NSDictionary *)change NS_REQUIRES_SUPER;
 
 
 #pragma mark - 其他