UIScrollView slideShow - iphone

Question

UIScrollView *scrl = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 768,1024)];
scrl.contentSize = CGSizeMake(768 * 8, 1024);
Here is the definition of my UIScrollView, I have a fill the scroll with 8 images each image is a 768*1024, how can I make UIScrollView slide show, each image stay 2 seconds and slides to the next image, how can I do that ?

Answer 1

You could use an UIImageView instead of a UIScrollView.
In your .h file:
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController {
int imageId;
UIImageView *imageView;
}
#property(nonatomic, retain) IBOutlet UIImageView * imageView;
#end
In your .m file:
#implementation ViewController
#import <QuartzCore/CAAnimation.h>
#define NUMBER_OF_IMAGES 8;
#synthesize imageView;
- (void)viewDidLoad
{
[super viewDidLoad];
imageId = 0;
[NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:#selector(changeImage) userInfo:nil repeats:YES];
}
-(void)changeImage
{
imageId = imageId + 1;
CATransition * trs = [CATransition animation];
trs.duration = 1;
[trs setType:kCATransitionPush];
int id = imageId % NUMBER_OF_IMAGES;
imageView.image = [UIImage imageNamed:[NSString stringWithFormat:#"image_%d.jpg", id]];
[imageView.layer addAnimation:trs forKey:kCATransition];
}
#end
You will need to add the QuartzCore.framework to your project.

Answer 2

I will not give you any code (that's YOUR job)...
Here is how to do such a thing:
Have a parent UIScrollView that handles paging - must implement the delegate method of scrollViewDidScroll:
Have a UIPageControl (used for keeping track of what page you are on, code-wise or UI wise)
IMPORTANT for zooming:
1. Create a subclass of UIScrollView and add a UIImageView to it as a subview.
2. Allow scrolling and no paging.
3. Make this subclass have implement the delegate method of viewForZoomingInScrollView: (return the UIImageView)