Page controller not at change when page scroll - iphone

Question

The Horizontal Scroll will work fine, but UIpagecontroller will not work means it will not change, As I scroll the page. I can't able to identify the error. Please see below code
#import "ViewController.h"
#interface ViewController ()
#property (strong, nonatomic) IBOutlet UIScrollView *scroll;
#property (strong, nonatomic) IBOutlet UIPageControl *pgcnt;
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
NSArray *arry=[NSArray arrayWithObjects:#"a",#"b",#"c",#"e",#"f", nil];
for (int i=0; i<arry.count; i++) {
CGRect frame;
[self.scroll setPagingEnabled:YES];
_scroll.pagingEnabled=YES;
_scroll.bounces = YES;
[_scroll setShowsHorizontalScrollIndicator:NO];
[_scroll setShowsVerticalScrollIndicator:NO];
frame.origin.x=_scroll.frame.size.width*i;
frame.size=_scroll.frame.size;
UIView *view=[[UIView alloc]initWithFrame:frame];
view.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:[arry objectAtIndex:i]]];
[_scroll addSubview:view];
[self.pgcnt setCurrentPage:i];
// self.pgcnt.numberOfPages=arry.count;
}
_scroll.contentSize=CGSizeMake(_scroll.frame.size.width*arry.count,_scroll.frame.size.height);
// Do any additional setup after loading the view, typically from a nib.
}
Any suggestion or help will appreciated

Answer 1

I found the solution , no one helped me, but its ok, i will help other people .i Didn't added delegate method thats why the Pagecontrol dot will not worked. But now working fine.
pragma mark - UIScrollView Delegate
- (void)scrollViewDidScroll:(UIScrollView *)sender
{
// Update the page when more than 50% of the previous/next page is visible
CGFloat pageWidth = self.scroll.frame.size.width;
int page = floor((self.scroll.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
self.pgcnt.currentPage = page;
}
thanks for
http://iosmadesimple.blogspot.in/2013/01/page-control-for-switching-between-views.html