- (void)toggleActivityView:(BOOL)isON
{
	if (!isON)
	{
		[activityView stopAnimating];
		arrowImage.hidden = NO;
	}
	else
	{
		[activityView startAnimating];
		arrowImage.hidden = YES;
		[self setStatus:kLoadingStatus];
	}
}

if (reloading) return;

//
//  EGORefreshTableHeaderView.h
//  Demo
//
//  Created by Devin Doty on 10/14/09October14.
//  Copyright 2009 enormego. All rights reserved.
//
 
#import <UIKit/UIKit.h>
 
@interface EGORefreshTableHeaderView : UIView {
 
	UILabel *lastUpdatedLabel;
	UILabel *statusLabel;
	UIImageView *arrowImage;
	UIActivityIndicatorView *activityView;
 
	BOOL isFlipped;
 
	NSDate *lastUpdatedDate;
}
@property BOOL isFlipped;
 
@property (nonatomic, retain) NSDate *lastUpdatedDate;
 
- (void)flipImageAnimated:(BOOL)animated;
- (void)toggleActivityView:(BOOL)isON;
- (void)setStatus:(int)status;
 
@end

//
//  EGORefreshTableHeaderView.m
//  Demo
//
//  Created by Devin Doty on 10/14/09October14.
//  Copyright 2009 enormego. All rights reserved.
//
 
#import "EGORefreshTableHeaderView.h"
#import <QuartzCore/QuartzCore.h>
 
#define kReleaseToReloadStatus	0
#define kPullToReloadStatus		1
#define kLoadingStatus			2
 
#define TEXT_COLOR [UIColor colorWithRed:0.341 green:0.737 blue:0.537 alpha:1.0]
#define BORDER_COLOR [UIColor colorWithRed:0.341 green:0.737 blue:0.537 alpha:1.0]
 
@implementation EGORefreshTableHeaderView
 
@synthesize isFlipped, lastUpdatedDate;
 
- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame])
	{
		self.backgroundColor = [UIColor colorWithRed:226.0/255.0
				green:231.0/255.0 blue:237.0/255.0 alpha:1.0];
 
		lastUpdatedLabel = [[UILabel alloc] initWithFrame:
			CGRectMake(0.0f, frame.size.height - 30.0f,
			 320.0f, 20.0f)];
		lastUpdatedLabel.font = [UIFont systemFontOfSize:12.0f];
		lastUpdatedLabel.textColor = TEXT_COLOR;
		lastUpdatedLabel.shadowColor =
			 [UIColor colorWithWhite:0.9f alpha:1.0f];
		lastUpdatedLabel.shadowOffset = CGSizeMake(0.0f, 1.0f);
		lastUpdatedLabel.backgroundColor = self.backgroundColor;
		lastUpdatedLabel.opaque = YES;
		lastUpdatedLabel.textAlignment = UITextAlignmentCenter;
		[self addSubview:lastUpdatedLabel];
		[lastUpdatedLabel release];
 
		statusLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0f,
				 frame.size.height - 48.0f, 320.0f, 20.0f)];
		statusLabel.font = [UIFont boldSystemFontOfSize:13.0f];
		statusLabel.textColor = TEXT_COLOR;
		statusLabel.shadowColor = [UIColor colorWithWhite:0.9f alpha:1.0f];
		statusLabel.shadowOffset = CGSizeMake(0.0f, 1.0f);
		statusLabel.backgroundColor = self.backgroundColor;
		statusLabel.opaque = YES;
		statusLabel.textAlignment = UITextAlignmentCenter;
		[self setStatus:kPullToReloadStatus];
		[self addSubview:statusLabel];
		[statusLabel release];
 
		arrowImage = [[UIImageView alloc] initWithFrame:
			CGRectMake(25.0f, frame.size.height
			- 65.0f, 30.0f, 55.0f)];
		arrowImage.contentMode = UIViewContentModeScaleAspectFit;
		arrowImage.image = [UIImage imageNamed:@"blueArrow.png"];
		[arrowImage layer].transform =
			CATransform3DMakeRotation(M_PI, 0.0f, 0.0f, 1.0f);
		[self addSubview:arrowImage];
		[arrowImage release];
 
		activityView = [[UIActivityIndicatorView alloc]
			initWithActivityIndicatorStyle:
			UIActivityIndicatorViewStyleGray];
		activityView.frame = CGRectMake(25.0f, frame.size.height
			- 38.0f, 20.0f, 20.0f);
		activityView.hidesWhenStopped = YES;
		[self addSubview:activityView];
		[activityView release];
 
		isFlipped = NO;
    }
    return self;
}
 
- (void)drawRect:(CGRect)rect{
	CGContextRef context = UIGraphicsGetCurrentContext();
	CGContextDrawPath(context,  kCGPathFillStroke);
	[BORDER_COLOR setStroke];
	CGContextBeginPath(context);
	CGContextMoveToPoint(context, 0.0f, self.bounds.size.height - 1);
	CGContextAddLineToPoint(context, self.bounds.size.width,
		self.bounds.size.height - 1);
	CGContextStrokePath(context);
}
 
- (void)flipImageAnimated:(BOOL)animated
{
	[UIView beginAnimations:nil context:NULL];
	[UIView setAnimationDuration:animated ? .18 : 0.0];
	[arrowImage layer].transform = isFlipped ?
			CATransform3DMakeRotation(M_PI, 0.0f, 0.0f, 1.0f) :
			CATransform3DMakeRotation(M_PI * 2, 0.0f, 0.0f, 1.0f);
	[UIView commitAnimations];
 
	isFlipped = !isFlipped;
}
 
- (void)setLastUpdatedDate:(NSDate *)newDate
{
	if (newDate)
	{
		if (lastUpdatedDate != newDate)
		{
			[lastUpdatedDate release];
		}
 
		lastUpdatedDate = [newDate retain];
 
		NSDateFormatter* formatter = [[NSDateFormatter alloc] init];
		[formatter setDateStyle:NSDateFormatterShortStyle];
		[formatter setTimeStyle:NSDateFormatterShortStyle];
		lastUpdatedLabel.text = [NSString stringWithFormat:
		@"Last Updated: %@", [formatter stringFromDate:lastUpdatedDate]];
		[formatter release];
	}
	else
	{
		lastUpdatedDate = nil;
		lastUpdatedLabel.text = @"Last Updated: Never";
	}
}
 
- (void)setStatus:(int)status
{
	switch (status) {
		case kReleaseToReloadStatus:
			statusLabel.text = @"Release to refresh...";
			break;
		case kPullToReloadStatus:
			statusLabel.text = @"Pull down to refresh...";
			break;
		case kLoadingStatus:
			statusLabel.text = @"Loading...";
			break;
		default:
			break;
	}
}
 
- (void)toggleActivityView:(BOOL)isON
{
	if (!isON)
	{
		[activityView stopAnimating];
		arrowImage.hidden = NO;
	}
	else
	{
		[activityView startAnimating];
		arrowImage.hidden = YES;
		[self setStatus:kLoadingStatus];
	}
}
 
- (void)dealloc
{
	activityView = nil;
	statusLabel = nil;
	arrowImage = nil;
	lastUpdatedLabel = nil;
    [super dealloc];
}
 
@end

//
//  PullToRefreshTableViewController.h
//  ASiST
//
//  Created by Oliver on 09.12.09.
//  Copyright 2009 Drobnik.com. All rights reserved.
//
 
#import <UIKit/UIKit.h>
#import "EGORefreshTableHeaderView.h"
#import "SoundEffect.h"
 
@interface PullToRefreshTableViewController : UITableViewController
{
	EGORefreshTableHeaderView *refreshHeaderView;
 
	BOOL checkForRefresh;
	BOOL reloading;
 
	SoundEffect *psst1Sound;
	SoundEffect *psst2Sound;
	SoundEffect *popSound;
}
 
- (void)dataSourceDidFinishLoadingNewData;
- (void) showReloadAnimationAnimated:(BOOL)animated;
 
@end

//
//  PullToRefreshTableViewController.m
//  ASiST
//
//  Created by Oliver on 09.12.09.
//  Copyright 2009 Drobnik.com. All rights reserved.
//
 
#import "PullToRefreshTableViewController.h"
 
#define kReleaseToReloadStatus 0
#define kPullToReloadStatus 1
#define kLoadingStatus 2
 
@implementation PullToRefreshTableViewController
 
- (void)viewDidLoad
{
    [super viewDidLoad];
 
	refreshHeaderView = [[EGORefreshTableHeaderView alloc] initWithFrame:
			CGRectMake(0.0f, 0.0f - self.view.bounds.size.height,
			320.0f, self.view.bounds.size.height)];
	[self.tableView addSubview:refreshHeaderView];
	self.tableView.showsVerticalScrollIndicator = YES;
 
	// pre-load sounds
	psst1Sound = [[SoundEffect alloc] initWithContentsOfFile:
				[[NSBundle mainBundle] pathForResource:@"psst1"
		ofType:@"wav"]];
	psst2Sound  = [[SoundEffect alloc] initWithContentsOfFile:
				[[NSBundle mainBundle] pathForResource:@"psst2"
		ofType:@"wav"]];
	popSound  = [[SoundEffect alloc] initWithContentsOfFile:
				[[NSBundle mainBundle] pathForResource:@"pop"
		ofType:@"wav"]];
 
}
 
- (void)dealloc
{
	[psst1Sound release];
	[psst2Sound release];
	[popSound release];
	[refreshHeaderView release];
    [super dealloc];
}
 
#pragma mark State Changes
 
- (void) showReloadAnimationAnimated:(BOOL)animated
{
	reloading = YES;
	[refreshHeaderView toggleActivityView:YES];
 
	if (animated)
	{
		[UIView beginAnimations:nil context:NULL];
		[UIView setAnimationDuration:0.2];
		self.tableView.contentInset = UIEdgeInsetsMake(60.0f, 0.0f, 0.0f,
			0.0f);
		[UIView commitAnimations];
	}
	else
	{
		self.tableView.contentInset = UIEdgeInsetsMake(60.0f, 0.0f, 0.0f,
			0.0f);
	}
}
 
- (void) reloadTableViewDataSource
{
	NSLog(@"Please override reloadTableViewDataSource");
}
 
- (void)dataSourceDidFinishLoadingNewData
{
	reloading = NO;
	[refreshHeaderView flipImageAnimated:NO];
	[UIView beginAnimations:nil context:NULL];
	[UIView setAnimationDuration:.3];
	[self.tableView setContentInset:UIEdgeInsetsMake(0.0f, 0.0f, 0.0f, 0.0f)];
	[refreshHeaderView setStatus:kPullToReloadStatus];
	[refreshHeaderView toggleActivityView:NO];
	[UIView commitAnimations];
	[popSound play];
}
 
#pragma mark Table view methods
 
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}
 
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:
	(NSInteger)section
{
    return 0;
}
 
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView
	cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
 
    static NSString *CellIdentifier = @"Cell";
 
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
		CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
				reuseIdentifier:CellIdentifier] autorelease];
    }
 
    // Set up the cell...
 
    return cell;
}
 
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:
	(NSIndexPath *)indexPath
{
    // Navigation logic may go here.
}
 
#pragma mark Scrolling Overrides
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
	if (!reloading)
	{
		checkForRefresh = YES;  //  only check offset when dragging
	}
} 
 
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
	if (reloading) return;
 
	if (checkForRefresh) {
		if (refreshHeaderView.isFlipped
				&& scrollView.contentOffset.y > -65.0f
				&& scrollView.contentOffset.y < 0.0f
				&& !reloading) {
			[refreshHeaderView flipImageAnimated:YES];
			[refreshHeaderView setStatus:kPullToReloadStatus];
			[popSound play];
 
		} else if (!refreshHeaderView.isFlipped
				&& scrollView.contentOffset.y < -65.0f) {
			[refreshHeaderView flipImageAnimated:YES];
			[refreshHeaderView setStatus:kReleaseToReloadStatus];
			[psst1Sound play];
		}
	}
}
 
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView
				 willDecelerate:(BOOL)decelerate
{
	if (reloading) return;
 
	if (scrollView.contentOffset.y <= - 65.0f) {
		if([self.tableView.dataSource respondsToSelector:
				@selector(reloadTableViewDataSource)]){
			[self showReloadAnimationAnimated:YES];
			[psst2Sound play];
			[self reloadTableViewDataSource];
		}
	}
	checkForRefresh = NO;
}
 
@end

#import "PullToRefreshTableViewController.h"
 
@interface AppDetailViewController : PullToRefreshTableViewController
@end

- (void)synchingDone:(NSNotification *)notification
{
	refreshHeaderView.lastUpdatedDate = myApp.lastReviewRefresh;
	[super dataSourceDidFinishLoadingNewData];
}
 
- (void)reloadTableViewDataSource
{
	[myApp getAllReviews];
}

if (alreadyReloading)
	[self showReloadAnimationAnimated:NO];