support loading-more by the end of scrollview

.gitignore

@@ -0,0 +1,18 @@
+# Xcode
+.DS_Store
+build/
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+*.xcworkspace
+!default.xcworkspace
+xcuserdata
+profile
+*.moved-aside
+DerivedData
+.idea/

Examples/Basic Example/SwipeViewExample.xcodeproj/project.pbxproj

@@ -17,6 +17,7 @@
 		01FA7D39145B5FCC00D118DB /* ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 01FA7D38145B5FCC00D118DB /* ViewController.m */; };
 		01FA7D3C145B5FCC00D118DB /* ViewController.xib in Resources */ = {isa = PBXBuildFile; fileRef = 01FA7D3A145B5FCC00D118DB /* ViewController.xib */; };
 		01FACD23166114E800B8C1A0 /* [email protected] in Resources */ = {isa = PBXBuildFile; fileRef = 01FACD22166114E800B8C1A0 /* [email protected] */; };
+		047AA37617991BAC003D398E /* TailLoadingView.m in Sources */ = {isa = PBXBuildFile; fileRef = 047AA37517991BAC003D398E /* TailLoadingView.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -36,6 +37,8 @@
 		01FA7D38145B5FCC00D118DB /* ViewController.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ViewController.m; sourceTree = "<group>"; };
 		01FA7D3B145B5FCC00D118DB /* en */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = en; path = en.lproj/ViewController.xib; sourceTree = "<group>"; };
 		01FACD22166114E800B8C1A0 /* [email protected] */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "[email protected]"; sourceTree = "<group>"; };
+		047AA37417991BAC003D398E /* TailLoadingView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TailLoadingView.h; sourceTree = "<group>"; };
+		047AA37517991BAC003D398E /* TailLoadingView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = TailLoadingView.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -55,6 +58,8 @@
 		019466D915B3129800B9CA30 /* SwipeView */ = {
 			isa = PBXGroup;
 			children = (
+				047AA37417991BAC003D398E /* TailLoadingView.h */,
+				047AA37517991BAC003D398E /* TailLoadingView.m */,
 				019466DA15B3129800B9CA30 /* SwipeView.h */,
 				019466DB15B3129800B9CA30 /* SwipeView.m */,
 			);
@@ -182,6 +187,7 @@
 				01FA7D36145B5FCC00D118DB /* AppDelegate.m in Sources */,
 				01FA7D39145B5FCC00D118DB /* ViewController.m in Sources */,
 				019466DC15B3129800B9CA30 /* SwipeView.m in Sources */,
+				047AA37617991BAC003D398E /* TailLoadingView.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

Examples/Basic Example/SwipeViewExample/ViewController.m

@@ -54,6 +54,9 @@ - (void)viewDidLoad
     //configure page control
     _pageControl.numberOfPages = _swipeView.numberOfPages;
     _pageControl.defersCurrentPageDisplay = YES;
+
+    //enable loading
+    [_swipeView enableLoadingView];
 }
 
 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

SwipeView/SwipeView.h

@@ -41,7 +41,7 @@
 
 
 #import <UIKit/UIKit.h>
-
+#import "TailLoadingView.h"
 
 typedef enum
 {
@@ -80,6 +80,10 @@ SwipeViewAlignment;
 @property (nonatomic, assign) BOOL defersItemViewLoading;
 @property (nonatomic, assign, getter = isVertical) BOOL vertical;
 
+@property (nonatomic, readwrite) BOOL loadingViewEnabled;
+@property (nonatomic, readonly) BOOL isLoading;
+@property (nonatomic, strong) TailLoadingView *tailLoadingView;
+
 - (void)reloadData;
 - (void)reloadItemAtIndex:(NSInteger)index;
 - (void)scrollByNumberOfItems:(NSInteger)itemCount duration:(NSTimeInterval)duration;
@@ -89,6 +93,9 @@ SwipeViewAlignment;
 - (NSInteger)indexOfItemView:(UIView *)view;
 - (NSInteger)indexOfItemViewOrSubview:(UIView *)view;
 
+- (void)enableLoadingView;
+- (void)doneLoadingMorePageContents;
+
 @end
 
 
@@ -114,4 +121,6 @@ SwipeViewAlignment;
 - (BOOL)swipeView:(SwipeView *)swipeView shouldSelectItemAtIndex:(NSInteger)index;
 - (void)swipeView:(SwipeView *)swipeView didSelectItemAtIndex:(NSInteger)index;
 
+- (void)swipeViewLoadingMore:(SwipeView*)swipeView;
+
 @end

SwipeView/SwipeView.m

@@ -65,7 +65,7 @@
 #import "SwipeView.h"
 
 
-@interface SwipeView () <UIScrollViewDelegate, UIGestureRecognizerDelegate>
+@interface SwipeView () <UIScrollViewDelegate, UIGestureRecognizerDelegate, TailloadingDelegate>
 
 @property (nonatomic, strong) UIScrollView *scrollView;
 @property (nonatomic, strong) NSMutableDictionary *itemViews;
@@ -83,6 +83,8 @@ @interface SwipeView () <UIScrollViewDelegate, UIGestureRecognizerDelegate>
 @property (nonatomic, assign) CGFloat lastUpdateOffset;
 @property (nonatomic, strong) NSTimer *timer;
 
+@property (nonatomic, readwrite) BOOL isLoading;
+
 @end
 
 
@@ -119,6 +121,8 @@ - (void)setUp
 	_scrollView.scrollsToTop = NO;
 	_scrollView.clipsToBounds = NO;
 
+    _loadingViewEnabled = NO;
+
     _decelerationRate = _scrollView.decelerationRate;
     _itemViews = [[NSMutableDictionary alloc] init];
     _previousItemIndex = 0;
@@ -163,6 +167,7 @@ - (void)dealloc
     [_scrollView ah_release];
     [_itemViews ah_release];
     [_itemViewPool ah_release];
+    [_tailLoadingView ah_release];
     [super ah_dealloc];
 }
 
@@ -923,6 +928,38 @@ - (void)loadUnloadViews
                 [self loadViewAtIndex:[number integerValue]];
             }
         }
+
+        //enable loading view
+        if (_loadingViewEnabled)
+        {
+            //remove loading view
+            if (([self currentPage] < [self numberOfPages] - 1) && _tailLoadingView)
+            {
+                [_tailLoadingView removeFromSuperview];
+            }
+
+            //add loading view
+            if ([self currentPage] == [self numberOfPages] - 1)
+            {
+                if (_tailLoadingView.superview == nil) {
+
+                    if (_tailLoadingView == nil) {
+                        if (!_vertical) {
+                            _tailLoadingView = [[TailLoadingView alloc] initWithFrame:CGRectMake(_scrollView.contentSize.width, 0,  80, _scrollView.bounds.size.height)];
+                        }
+                        else{
+                            _tailLoadingView = [[TailLoadingView alloc] initWithFrame:CGRectMake(0, _scrollView.contentSize.height,  _scrollView.bounds.size.width, 60)];
+                            [_tailLoadingView setIsVertical:_vertical];
+                        }
+                        _tailLoadingView.delegate = self;
+                    }
+
+                    [_scrollView addSubview:_tailLoadingView];
+                    [_scrollView bringSubviewToFront:_tailLoadingView];
+                }
+            }
+        }
+
     }
 }
 
@@ -998,6 +1035,42 @@ - (void)didMoveToSuperview
     }
 }
 
+#pragma mark -
+#pragma mark - Tail Loading
+- (void)enableLoadingView
+{
+    _loadingViewEnabled = YES;
+    _wrapEnabled = NO;
+}
+
+- (void)startLoadMorePageContents
+{
+    //here should be some real data loading
+    _isLoading = YES;
+    if ([_delegate respondsToSelector:@selector(swipeViewLoadingMore:)]) {
+        [_delegate swipeViewLoadingMore:self];
+    }
+}
+
+- (void)doneLoadingMorePageContents
+{
+    //real data loading done
+    _isLoading = NO;
+    [_tailLoadingView tailloadingScrollViewDataSourceDidFinishedLoading:_scrollView];
+}
+
+- (void)tailloadingDidTriggerLoad:(TailLoadingView *)view
+{
+    [self startLoadMorePageContents];
+    [self performSelector:@selector(doneLoadingMorePageContents) withObject:nil afterDelay:3.0];
+}
+
+- (BOOL)tailloadDataSourceIsLoading:(TailLoadingView *)view
+{
+    return _isLoading;
+}
+
+
 #pragma mark -
 #pragma mark Gestures and taps
 
@@ -1093,6 +1166,9 @@ - (void)scrollViewDidScroll:(UIScrollView *)scrollView
     {
         _previousContentOffset = _scrollView.contentOffset;
     }
+
+    if(_loadingViewEnabled)
+        [_tailLoadingView tailloadingScrollViewDidScroll:scrollView];
 }
 
 - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
@@ -1119,6 +1195,10 @@ - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL
     {
         [_delegate swipeViewDidEndDragging:self willDecelerate:decelerate];
     }
+
+    if(_loadingViewEnabled)
+        [_tailLoadingView tailloadingScrollViewDidEndDragging:scrollView];
+
 }
 
 - (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView

SwipeView/TailLoadingView.h

@@ -0,0 +1,41 @@
+//
+//  TailLoadingView.h
+//  SwipeViewExample
+//
+//  Created by B.H.Liu on 13-7-18.
+//
+//
+
+#import <UIKit/UIKit.h>
+
+
+typedef enum{
+    TailLoadingDragging = 0,
+    TailLoadingOngoing,
+    TailLoadingNormal
+} LoadingViewStatus;
+
+@class TailLoadingView;
+
+@protocol TailloadingDelegate <NSObject>
+
+- (void)tailloadingDidTriggerLoad:(TailLoadingView*)view;
+- (BOOL)tailloadDataSourceIsLoading:(TailLoadingView*)view;
+
+@end
+
+@interface TailLoadingView : UIView
+{
+    UILabel *_loadingLabel;
+    UIActivityIndicatorView *_activityView;
+    LoadingViewStatus status;
+}
+
+@property (nonatomic,assign) id <TailloadingDelegate> delegate;
+@property (nonatomic,readwrite) BOOL isVertical;
+
+- (void)tailloadingScrollViewDidScroll:(UIScrollView *)scrollView;
+- (void)tailloadingScrollViewDidEndDragging:(UIScrollView *)scrollView;
+- (void)tailloadingScrollViewDataSourceDidFinishedLoading:(UIScrollView *)scrollView;
+
+@end