Lock vertical pan gesture in MXPagerView

Example/MXSegmentedPager/Parallax/MXParallaxViewController.m

@@ -180,7 +180,7 @@ - (UIView *)segmentedPager:(MXSegmentedPager *)segmentedPager viewForPageAtIndex
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
 
     NSInteger index = (indexPath.row % 2) + 1;
-    [self.segmentedPager scrollToPageAtIndex:index animated:YES];
+    [self.segmentedPager.pager showPageAtIndex:index animated:YES];
 }
 
 #pragma -mark <UITableViewDataSource>

Example/MXSegmentedPager/Parallax/MXRefreshHeaderView.xib

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="7706" systemVersion="14E46" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="8191" systemVersion="14F27" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES">
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="7703"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="8154"/>
         <capability name="Aspect ratio constraints" minToolsVersion="5.1"/>
     </dependencies>
     <objects>

Example/MXSegmentedPager/Simple/MXSimpleViewController.m

@@ -140,7 +140,7 @@ - (UIView *)segmentedPager:(MXSegmentedPager *)segmentedPager viewForPageAtIndex
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
 
     NSInteger index = (indexPath.row % 2) + 1;
-    [self.segmentedPager scrollToPageAtIndex:index animated:YES];
+    [self.segmentedPager.pager showPageAtIndex:index animated:YES];
 }
 
 #pragma -mark <UITableViewDataSource>

Example/MXSegmentedPager/Storyboard/MXNumberViewController.m

@@ -17,7 +17,7 @@ @implementation MXNumberViewController
 
 - (void)viewDidLoad {
     [super viewDidLoad];
-    self.numberLabel.text = [NSString stringWithFormat:@"Page %li", self.number];
+    self.numberLabel.text = [NSString stringWithFormat:@"Page %li", (long)self.number];
 }
 
 - (void)didReceiveMemoryWarning {
@@ -27,7 +27,7 @@ - (void)didReceiveMemoryWarning {
 
 - (void)setNumber:(NSInteger)number {
     _number = number;
-    self.numberLabel.text = [NSString stringWithFormat:@"Page %li", self.number];
+    self.numberLabel.text = [NSString stringWithFormat:@"Page %li", (long)self.number];
 }
 
 @end

Example/MXSegmentedPager/Storyboard/MXStoryboardViewController.m

@@ -8,13 +8,18 @@
 
 #import "MXStoryboardViewController.h"
 #import "MXNumberViewController.h"
+#import "MXRefreshHeaderView.h"
 
 @implementation MXStoryboardViewController
 
 - (void)viewDidLoad {
     [super viewDidLoad];
     self.view.backgroundColor = UIColor.whiteColor;
 
+    // Parallax Header
+    [self.segmentedPager setParallaxHeaderView:[MXRefreshHeaderView instantiateFromNib] mode:VGParallaxHeaderModeFill height:150.f];
+    self.segmentedPager.minimumHeaderHeight = 20.f;
+
     // Segmented Control customization
     self.segmentedPager.segmentedControl.selectionIndicatorLocation = HMSegmentedControlSelectionIndicatorLocationDown;
     self.segmentedPager.segmentedControl.backgroundColor = [UIColor whiteColor];

MXSegmentedPager/MXPagerView.h

@@ -22,6 +22,38 @@
 
 #import <UIKit/UIKit.h>
 
+/**
+ UIPanGestureRecognizer direction enumeration.
+ */
+typedef NS_ENUM(NSInteger, MXPanGestureDirection){
+    /** No direction. */
+    MXPanGestureDirectionNone  = 1 << 0,
+    /** Right direction. */
+    MXPanGestureDirectionRight = 1 << 1,
+    /** Left direction. */
+    MXPanGestureDirectionLeft  = 1 << 2,
+    /** Up direction. */
+    MXPanGestureDirectionUp    = 1 << 3,
+    /** Down direction. */
+    MXPanGestureDirectionDown  = 1 << 4
+};
+
+/**
+ UIPanGestureRecognizer category with direction getter.
+ */
+@interface UIPanGestureRecognizer (Direction)
+
+/**
+ Gets the pan gesture direction of the specified view.
+ 
+ @param view The view
+ 
+ @return The pan gesture direction.
+ */
+- (MXPanGestureDirection) directionInView:(nullable __kindof UIView *)view;
+
+@end
+
 /**
  The pager transition styles.
  */
@@ -206,4 +238,5 @@ typedef NS_ENUM(NSInteger, MXPagerViewTransitionStyle) {
  if the page is reusable (has a reuse identifier), this is called just before the page is returned from the pager view method dequeueReusablePageWithIdentifier:.
  */
 - (void) prepareForReuse;
+
 @end

MXSegmentedPager/MXPagerView.m

@@ -23,24 +23,15 @@
 #import <objc/runtime.h>
 #import "MXPagerView.h"
 
-@implementation UIView (ReuseIdentifier)
-
-- (NSString *)reuseIdentifier {
-    return objc_getAssociatedObject(self, @selector(reuseIdentifier));
-}
-
-- (void)setReuseIdentifier:(NSString *)reuseIdentifier {
-    objc_setAssociatedObject(self, @selector(reuseIdentifier), reuseIdentifier, OBJC_ASSOCIATION_COPY);
-}
-
-- (void)prepareForReuse {
-
-}
+@interface UIView ()
+@property (nonatomic, copy) NSString *reuseIdentifier;
+@end
 
+@interface MXContentView : UIScrollView <UIGestureRecognizerDelegate>
 @end
 
 @interface MXPagerView () <UIScrollViewDelegate>
-@property (nonatomic, strong) UIScrollView          *contentView;
+@property (nonatomic, strong) MXContentView         *contentView;
 @property (nonatomic, strong) NSMutableDictionary   *pages;
 
 @property (nonatomic, strong) NSMutableDictionary   *registration;
@@ -94,11 +85,12 @@ - (void) reloadData {
 
     //Loads the current selected page
     [self loadPageAtIndex:_index];
+
+    [self layoutIfNeeded];
 }
 
 - (void) showPageAtIndex:(NSInteger)index animated:(BOOL)animated {
 
-
     //The tab behavior disable animation
     animated = (self.transitionStyle == MXPagerViewTransitionStyleTab)? NO : animated;
 
@@ -124,7 +116,7 @@ - (void)registerClass:(Class)pageClass forPageReuseIdentifier:(NSString *)identi
     [self.registration setValue:NSStringFromClass(pageClass) forKey:identifier];
 }
 
-- (__kindof UIView *)dequeueReusablePageWithIdentifier:(NSString *)identifier {
+- (UIView *)dequeueReusablePageWithIdentifier:(NSString *)identifier {
 
     for (UIView *page in self.reuseQueue) {
         if (!page.superview && [page.reuseIdentifier isEqualToString:identifier]) {
@@ -153,9 +145,9 @@ - (__kindof UIView *)dequeueReusablePageWithIdentifier:(NSString *)identifier {
 
 #pragma mark Properties
 
-- (UIScrollView *)contentView {
+- (MXContentView *)contentView {
     if (!_contentView) {
-        _contentView = [[UIScrollView alloc] init];
+        _contentView = [[MXContentView alloc] init];
         _contentView.delegate = self;
         _contentView.scrollsToTop = NO;
         _contentView.pagingEnabled = YES;
@@ -329,3 +321,56 @@ - (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView {
 }
 
 @end
+
+@implementation MXContentView
+
+#pragma mark <UIGestureRecognizerDelegate>
+
+- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{
+
+    if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {
+        MXPanGestureDirection direction = [(UIPanGestureRecognizer*)gestureRecognizer directionInView:self];
+
+        //Lock vertical pan gesture.
+        if (direction == MXPanGestureDirectionUp || direction == MXPanGestureDirectionDown) {
+            return NO;
+        }
+    }
+    return YES;
+}
+
+@end
+
+@implementation UIView (ReuseIdentifier)
+
+- (NSString *)reuseIdentifier {
+    return objc_getAssociatedObject(self, @selector(reuseIdentifier));
+}
+
+- (void)setReuseIdentifier:(NSString *)reuseIdentifier {
+    objc_setAssociatedObject(self, @selector(reuseIdentifier), reuseIdentifier, OBJC_ASSOCIATION_COPY);
+}
+
+- (void)prepareForReuse {
+
+}
+
+@end
+
+@implementation UIPanGestureRecognizer (Direction)
+
+- (MXPanGestureDirection) directionInView:(UIView *)view {
+    CGPoint velocity = [self velocityInView:view];
+    CGFloat absX = fabs(velocity.x);
+    CGFloat absY = fabs(velocity.y);
+
+    if (absX > absY) {
+        return (velocity.x > 0)? MXPanGestureDirectionRight : MXPanGestureDirectionLeft;
+    }
+    else if (absX < absY) {
+        return (velocity.y > 0)? MXPanGestureDirectionDown : MXPanGestureDirectionUp;
+    }
+    return MXPanGestureDirectionNone;
+}
+
+@end

MXSegmentedPager/MXSegmentedPager.h

@@ -187,14 +187,6 @@ typedef void (^MXProgressBlock) (CGFloat progress);
  */
 - (void) reloadData;
 
-/**
- Scrolls through the pager until a page identified by index is at a particular location on the screen.
- 
- @param index       An index that identifies a page.
- @param animated    YES if you want to animate the change in position; NO if it should be immediate.
- */
-- (void) scrollToPageAtIndex:(NSInteger)index animated:(BOOL)animated;
-
 @end
 
 /**

MXSegmentedPager/MXSegmentedPager.m

@@ -23,13 +23,7 @@
 #import <objc/runtime.h>
 #import "MXSegmentedPager.h"
 
-typedef NS_ENUM(NSInteger, MXPanGestureDirection) {
-    MXPanGestureDirectionNone  = 1 << 0,
-    MXPanGestureDirectionRight = 1 << 1,
-    MXPanGestureDirectionLeft  = 1 << 2,
-    MXPanGestureDirectionUp    = 1 << 3,
-    MXPanGestureDirectionDown  = 1 << 4
-};
+
 
 @interface MXScrollView : UIScrollView <UIScrollViewDelegate, UIGestureRecognizerDelegate>
 @property (nonatomic, assign) CGFloat minimumHeigth;
@@ -120,11 +114,9 @@ - (void)reloadData {
 
     self.segmentedControl.sectionImages = images;
     self.segmentedControl.sectionTitles = titles;
-}
-
-- (void) scrollToPageAtIndex:(NSInteger)index animated:(BOOL)animated {
-    [self.segmentedControl setSelectedSegmentIndex:index animated:animated];
-    [self.pager showPageAtIndex:index animated:animated];
+
+    [self.pager reloadData];
+    [self layoutIfNeeded];
 }
 
 #pragma mark Properties
@@ -336,8 +328,9 @@ - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
 - (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{
 
     if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {
-        MXPanGestureDirection direction = [self getDirectionOfPanGestureRecognizer:(UIPanGestureRecognizer*)gestureRecognizer];
+        MXPanGestureDirection direction = [(UIPanGestureRecognizer*)gestureRecognizer directionInView:self];
 
+        //Lock horizontal pan gesture.
         if (direction == MXPanGestureDirectionLeft || direction == MXPanGestureDirectionRight) {
             return NO;
         }
@@ -348,7 +341,7 @@ - (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{
 - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
 
     UIView<MXPageProtocol> *page = (id) self.segmentedPager.pager.selectedPage;
-    BOOL shouldScroll = self.scrollEnabled;
+    BOOL shouldScroll = YES;
 
     if ([page respondsToSelector:@selector(segmentedPager:shouldScrollWithView:)]) {
         shouldScroll = [page segmentedPager:self.segmentedPager shouldScrollWithView:otherGestureRecognizer.view];
@@ -360,21 +353,6 @@ - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecogni
     return shouldScroll;
 }
 
-- (MXPanGestureDirection) getDirectionOfPanGestureRecognizer:(UIPanGestureRecognizer*) panGestureRecognizer {
-
-    CGPoint velocity = [panGestureRecognizer velocityInView:self];
-    CGFloat absX = fabs(velocity.x);
-    CGFloat absY = fabs(velocity.y);
-
-    if (absX > absY) {
-        return (velocity.x > 0)? MXPanGestureDirectionRight : MXPanGestureDirectionLeft;
-    }
-    else if (absX < absY) {
-        return (velocity.y > 0)? MXPanGestureDirectionDown : MXPanGestureDirectionUp;
-    }
-    return MXPanGestureDirectionNone;
-}
-
 #pragma mark KVO
 
 - (void) addObserverToView:(UIView *)view {