Add delegate methods:

```
- (void)segmentedPager:(MXSegmentedPager *)segmentedPager willDisplayPage:(UIView *)page atIndex:(NSInteger)index;
- (void)segmentedPager:(MXSegmentedPager *)segmentedPager didEndDisplayingPage:(UIView *)page atIndex:(NSInteger)index;
```

MXSegmentedPager/MXSegmentedPager.h

@@ -72,6 +72,26 @@ typedef NS_ENUM(NSInteger, MXSegmentedControlPosition) {
  */
 - (void)segmentedPager:(MXSegmentedPager *)segmentedPager didSelectViewWithIndex:(NSInteger)index;
 
+/**
+ Tells the delegate the segmented pager is about to draw a page for a particular index.
+ A segmented page view sends this message to its delegate just before it uses page to draw a index, thereby permitting the delegate to customize the page object before it is displayed.
+ 
+ @param segmentedPager The segmented-pager object informing the delegate of this impending event.
+ @param page A page view object that segmented-pager is going to use when drawing the index.
+ @param index An index locating the page in pagerView.
+ */
+- (void)segmentedPager:(MXSegmentedPager *)segmentedPager willDisplayPage:(UIView *)page atIndex:(NSInteger)index;
+
+/**
+ Tells the delegate that the specified page was removed from the pager.
+ Use this method to detect when a page is removed from a pager view, as opposed to monitoring the view itself to see when it appears or disappears.
+ 
+ @param segmentedPager The segmented-pager object that removed the view.
+ @param page The page that was removed.
+ @param index The index of the page.
+ */
+- (void)segmentedPager:(MXSegmentedPager *)segmentedPager didEndDisplayingPage:(UIView *)page atIndex:(NSInteger)index;
+
 /**
  Asks the delegate to return the height of the segmented control in the segmented-pager.
  If the delegate doesn’t implement this method, 44 is assumed.

MXSegmentedPager/MXSegmentedPager.m

@@ -256,6 +256,18 @@ - (void)pagerView:(MXPagerView *)pagerView didMoveToPage:(UIView *)page atIndex:
     [self changedToIndex:index];
 }
 
+- (void)pagerView:(MXPagerView *)pagerView willDisplayPage:(UIView *)page atIndex:(NSInteger)index {
+    if ([self.delegate respondsToSelector:@selector(segmentedPager:willDisplayPage:atIndex:)]) {
+        [self.delegate segmentedPager:self willDisplayPage:page atIndex:index];
+    }
+}
+
+- (void)pagerView:(MXPagerView *)pagerView didEndDisplayingPage:(UIView *)page atIndex:(NSInteger)index {
+    if ([self.delegate respondsToSelector:@selector(segmentedPager:didEndDisplayingPage:atIndex:)]) {
+        [self.delegate segmentedPager:self didEndDisplayingPage:page atIndex:index];
+    }
+}
+
 #pragma mark <MXPagerViewDataSource>
 
 - (NSInteger)numberOfPagesInPagerView:(MXPagerView *)pagerView {