How to next image in scroll view by next button in iphone - iphone

Question

I have image in scroll view it is loading images from the array i also want this that when i press nextbutton next image should appear I have done following code for loading images in scrollview i want to go prevoius and next image by button click when i click next button it doesw not show next image
-(void) loadNews{
NSURL*myurl=url;
myurl = [myurl stringByReplacingOccurrencesOfString:#"\n" withString:#""];
myurl = [myurl stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSURL*urlloaded= [[NSURL alloc]initWithString:myurl];
//NSURL*url= [[NSURL alloc]initWithString:#"http://localhost:8888/RowOne.xml"];
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:urlloaded];
//Initialize the delegate.
RowTwoParser *parser = [[RowTwoParser alloc] initXMLParser];
//Set delegate
[xmlParser setDelegate:parser];
BOOL success = [xmlParser parse];
if(success)
NSLog(#"No Errors");
else
NSLog(#"Error Error Error!!!");
int k=0;
for (int i=0; i < [appDelegate.articles count]; i++) {
CGRect frame;
frame.origin.x = self.scrollView.frame.size.width * i;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
UIView*subView=[[UIView alloc ]initWithFrame:frame];
[self.scrollView addSubview:subView];
RowTwo*aRowTwo=[appDelegate.articles objectAtIndex:i];
CGRect mywebframe=CGRectMake(20, 60, 728, 800);
UIImageView*imageView=[[UIImageView alloc] initWithFrame:mywebframe];
NSString*thumb2=aRowTwo.image;
thumb2 = [thumb2 stringByReplacingOccurrencesOfString:#"\n" withString:#""];
thumb2 = [thumb2 stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSURL *url = [NSURL URLWithString:thumb2];
NSData *data = [[NSData alloc] initWithContentsOfURL:url];
UIImage *image2 = [[UIImage alloc] initWithData:data];
imageView.image =image2 ;
[subView addSubview:imageView];
k++;
}
//NSInteger numberofPages=10-j;
NSInteger numberofPages=[appDelegate.articles count];
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * numberofPages, self.scrollView.frame.size.height);
CGRect frame;
//frame.origin.x = self.scrollView.frame.size.width * self.pageControl.currentPage;
frame.origin.x = self.scrollView.frame.size.width * myindex;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
[self.scrollView scrollRectToVisible:frame animated:YES];
[pageControl setNumberOfPages:numberofPages];
[pageControl setActivePageColor:[UIColor clearColor]];
[pageControl setInactivePageColor:[UIColor clearColor]];
}
Next Button Code
-(IBAction)nextButton{
for (int nextIndex=[pageControl currentPage]; nextIndex < [appDelegate.articles count]; nextIndex++) {
CGRect frame;
frame.origin.x = self.scrollView.frame.size.width * nextIndex;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
UIView*subView=[[UIView alloc ]initWithFrame:frame];
[self.scrollView addSubview:subView];
RowTwo*aRowTwo=[appDelegate.articles objectAtIndex:nextIndex];
CGRect mywebframe=CGRectMake(20, 60, 728, 800);
UIImageView*imageView=[[UIImageView alloc] initWithFrame:mywebframe];
NSString*thumb2=aRowTwo.image;
thumb2 = [thumb2 stringByReplacingOccurrencesOfString:#"\n" withString:#""];
thumb2 = [thumb2 stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSURL *url = [NSURL URLWithString:thumb2];
NSData *data = [[NSData alloc] initWithContentsOfURL:url];
UIImage *image2 = [[UIImage alloc] initWithData:data];
imageView.image =image2 ;
[subView addSubview:imageView];
// k+\
}
//NSInteger numberofPages=10-j;
NSInteger numberofPages=[appDelegate.articles count];
self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * numberofPages, self.scrollView.frame.size.height);
CGRect frame;
//frame.origin.x = self.scrollView.frame.size.width * self.pageControl.currentPage;
frame.origin.x = self.scrollView.frame.size.width * myindex;
frame.origin.y = 0;
frame.size = self.scrollView.frame.size;
[self.scrollView scrollRectToVisible:frame animated:YES];
[pageControl setNumberOfPages:numberofPages];
[pageControl setActivePageColor:[UIColor clearColor]];
[pageControl setInactivePageColor:[UIColor clearColor]];
}

Answer 1

If they are in scroll view, you use
CGPoint offset = CGPointMake(xPositionToScroll, yPositionToScroll);
[self.scrollView setContentOffset:topOffset animated:YES];
To some specific point.