UIScrollSlidingPages - Add delegate callback for scroll event to give…

… a indication of a paging event(helps in the scenario when users want feedback on the scroll)
TomThorpe · Dec 6, 2013 · 211cb58 · 211cb58
1 parent 2eae9b9
commit 211cb58
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Showing 6 changed files with 35 additions and 2 deletions.
diff --git a/UIScrollSlidingPages.xcodeproj/project.pbxproj b/UIScrollSlidingPages.xcodeproj/project.pbxproj
@@ -36,6 +36,7 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
+		37989C431852727A00A97623 /* TTSliddingPageDelegate.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = TTSliddingPageDelegate.h; sourceTree = "<group>"; };
 		9F2035E31706475B00438E50 /* diagmonds.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = diagmonds.png; sourceTree = "<group>"; };
 		9F2035E41706475B00438E50 /* diagmonds_@2X.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "diagmonds_@2X.png"; sourceTree = "<group>"; };
 		9F2035E51706475B00438E50 /* readme.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = readme.txt; sourceTree = "<group>"; };
@@ -185,6 +186,7 @@
 				9F602A66171E083F00088A9C /* TTBlackTriangle.m */,
 				9FFDC5CA1722EEA1002A5689 /* TTScrollViewWrapper.h */,
 				9FFDC5CB1722EEA1002A5689 /* TTScrollViewWrapper.m */,
+				37989C431852727A00A97623 /* TTSliddingPageDelegate.h */,
 			);
 			path = Source;
 			sourceTree = "<group>";

diff --git a/UIScrollViewSlidingPages/Demo/TTViewController.h b/UIScrollViewSlidingPages/Demo/TTViewController.h
@@ -8,8 +8,9 @@
 
 #import <UIKit/UIKit.h>
 #import "TTSlidingPagesDataSource.h"
+#import "TTSliddingPageDelegate.h"
 
-@interface TTViewController : UIViewController<TTSlidingPagesDataSource>{
+@interface TTViewController : UIViewController<TTSlidingPagesDataSource, TTSliddingPageDelegate>{
 }
 
 @end
diff --git a/UIScrollViewSlidingPages/Demo/TTViewController.m b/UIScrollViewSlidingPages/Demo/TTViewController.m
@@ -127,4 +127,10 @@ -(TTSlidingPageTitle *)titleForSlidingPagesViewController:(TTScrollSlidingPagesC
 //    }
 //}
 
+#pragma mark - delegate
+-(void)didScrollToViewAtIndex:(NSUInteger)index
+{
+  NSLog(@"scrolled to view");
+}
+
 @end
diff --git a/UIScrollViewSlidingPages/Source/TTScrollSlidingPagesController.h b/UIScrollViewSlidingPages/Source/TTScrollSlidingPagesController.h
@@ -30,6 +30,8 @@
 
 #import <UIKit/UIKit.h>
 #import "TTSlidingPagesDataSource.h"
+#import "TTSliddingPageDelegate.h"
+
 @class TTScrollViewWrapper;
 
 @interface TTScrollSlidingPagesController : UIViewController<UIScrollViewDelegate>{
@@ -52,7 +54,9 @@
 
 
 
-@property (nonatomic, strong) id<TTSlidingPagesDataSource> dataSource;
+@property (nonatomic, weak) id<TTSlidingPagesDataSource> dataSource;
+
+@property (nonatomic, weak) id<TTSliddingPageDelegate> delegate;
 
 /** @property titleScrollerHidden
  *  @brief Whether the title scroller bar is hidden or not.

diff --git a/UIScrollViewSlidingPages/Source/TTScrollSlidingPagesController.m b/UIScrollViewSlidingPages/Source/TTScrollSlidingPagesController.m
@@ -528,6 +528,11 @@ - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
         topScrollView.delegate = nil;
         topScrollView.contentOffset = CGPointMake(topXPosition, 0);
         topScrollView.delegate = self;
+
+        //call the delegate to tell him you've scrolled to another page
+        if([self.delegate respondsToSelector:@selector(didScrollToViewAtIndex:)]){
+          [self.delegate didScrollToViewAtIndex:currentPage];
+        }
     }
 
 }

diff --git a/UIScrollViewSlidingPages/Source/TTSliddingPageDelegate.h b/UIScrollViewSlidingPages/Source/TTSliddingPageDelegate.h
@@ -0,0 +1,15 @@
+//
+//  TTSliddingPageDelegate.h
+//  UIScrollSlidingPages
+//
+//  Created by John Doran on 06/12/2013.
+//  Copyright (c) 2013 Thomas Thorpe. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@protocol TTSliddingPageDelegate <NSObject>
+
+-(void)didScrollToViewAtIndex:(NSUInteger)index;
+
+@end