gistfile1.txt

//
//  WallrViewController.m
//  Wallr
//
//  Created by Peter Nicholls on 2/07/11.
//  Copyright 2011 NA. All rights reserved.
//

#import "WallrViewController.h"
#import <QuartzCore/QuartzCore.h>

@implementation WallrViewController
@synthesize scrollView;
@synthesize pageControl;


- (void)dealloc
{
    [super dealloc];
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle


// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
    [super viewDidLoad];
    [self setupPage];
}

- (void)setupPage
{
	scrollView.delegate = self;
    
	[scrollView setCanCancelContentTouches:NO];
	
	scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
	scrollView.clipsToBounds = YES;
	scrollView.scrollEnabled = YES;
	scrollView.pagingEnabled = YES;
	
    NSMutableArray *images = [[NSMutableArray alloc] init]; 
    [images addObject:[UIImage imageNamed:@"image1.png"]];
    [images addObject:[UIImage imageNamed:@"image2.png"]];
    [images addObject:[UIImage imageNamed:@"image3.jpg"]];
    [images addObject:[UIImage imageNamed:@"image4.png"]];
    [images addObject:[UIImage imageNamed:@"image1.png"]];
    [images addObject:[UIImage imageNamed:@"image2.png"]];
    [images addObject:[UIImage imageNamed:@"image3.jpg"]];
    [images addObject:[UIImage imageNamed:@"image4.png"]];
    
    
    NSUInteger nimages = images.count;
	CGFloat cx = 0;
    
    
	for (UIImage *image in images) {
		if (image == nil) {
			break;
		}
        
        CGRect myImageRect = CGRectMake(185.0f, 135.0f, 400.0f, 300.0f);
		UIImageView *imageView = [[UIImageView alloc] initWithFrame:myImageRect];
        [imageView setImage:image];
        
       
        [imageView.layer setBorderColor: [[UIColor whiteColor] CGColor]];
        [imageView.layer setBorderWidth: 5.0];
        imageView.layer.shadowColor = [UIColor grayColor].CGColor;
        imageView.layer.shadowOffset = CGSizeMake(0, 1);
        imageView.layer.shadowOpacity = 1;
        imageView.layer.shadowRadius = 1.0;
        imageView.opaque = YES; // explicitly opaque for performance
        imageView.userInteractionEnabled = YES;
        
        CGRect rect = imageView.frame;
		rect.origin.x = 185.0f + cx;
		rect.origin.y = 135.0f;
		imageView.frame = rect;
        
        
        
        
		[scrollView addSubview:imageView];
        
        
		[imageView release];
        
        
        
        
		cx += scrollView.frame.size.width;
        
	}
	
	self.pageControl.numberOfPages = nimages;
	[scrollView setContentSize:CGSizeMake(cx, [scrollView bounds].size.height)];
}


#pragma mark -
#pragma mark UIScrollViewDelegate stuff
- (void)scrollViewDidScroll:(UIScrollView *)_scrollView
{
    if (pageControlIsChangingPage) {
        return;
    }
    
	/*
	 *	We switch page at 50% across
	 */
    CGFloat pageWidth = _scrollView.frame.size.width;
    int page = floor((_scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
    pageControl.currentPage = page;
}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)_scrollView 
{
    pageControlIsChangingPage = NO;
}

#pragma mark -
#pragma mark PageControl stuff
- (IBAction)changePage:(id)sender 
{
	/*
	 *	Change the scroll view
	 */
    CGRect frame = scrollView.frame;
    frame.origin.x = frame.size.width * pageControl.currentPage;
    frame.origin.y = 0;
	
    [scrollView scrollRectToVisible:frame animated:YES];
    
	/*
	 *	When the animated scrolling finishings, scrollViewDidEndDecelerating will turn this off
	 */
    pageControlIsChangingPage = YES;
}



- (void)viewDidUnload 
{
	[scrollView release];
	[pageControl release];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return YES;
}

@end