Pagecontrol dots are not changing - iphone

Question

I'm trying to work with a page control. This is what I did. I've added one onto my view in the storyboard.
Then in my ViewDidLoad
images = [[NSMutableArray alloc]initWithObjects:[UIImage imageNamed:#"img1.jpg"],[UIImage imageNamed:#"img2.jpg"],[UIImage imageNamed:#"img3.jpg"],[UIImage imageNamed:#"img4.jpg"], nil];
pagecontrol = [[UIPageControl alloc]init];
self.imageIndex = 0;
[pagecontrol setNumberOfPages:images.count];
[pagecontrol setCurrentPage:imageIndex];
Like you can see I have an array of four images. I've added a pagecontrol onto an imageview. I also added two swipe gestures onto the imageView (Left and right). What I want to do now is that when I swipe:
The image is changed
The dot is updated with the correct position in the array
This is my code for right swipe:
- (void)next:(UITapGestureRecognizer *)recognizer {
if(imageIndex == images.count-1){
imageIndex = images.count-1;
}else{
imageIndex++;
}
[UIView transitionWithView:self.imgGallery
duration:1.0f
options:UIViewAnimationOptionTransitionCrossDissolve
animations:^{
self.imgGallery.image = [images objectAtIndex:imageIndex];
} completion:nil];
[pagecontrol setCurrentPage:imageIndex];
}
Problem
My images are changing properly. But my pagecontrol dot is not updating and also it is showing only 3 dots.
Can anybody help ?

Answer 1

enable paging in scrollview
[self.scrollView setPagingEnabled:YES];
Set delegate to your scrollview

Answer 2

where You define A pageControll
[_tutorialPageControll addTarget:self action:#selector(changPage) forControlEvents:UIControlEventValueChanged];
_tutorialPageControll.currentPage = 0;
_tutorialPageControll.numberOfPages = TutorialArray.count;
and in where You want a Chang thepage
_tutorialPageControll.currentPage = imageIndex;