Scaling the page control will scale the dots, but will also scale the spacing in between them. pageControl.transform = CGAffineTransform(scaleX: 2, y: 2) If you want to keep the same spacing between dots, you’ll need to transform the dots individually: pageControl.subviews.forEach { $0.transform = CGAffineTransform(scaleX: 2, y: 2) } However, if you do this in … Read more
You can get the current index by monitoring contentOffset in scrollViewDidScroll delegate it will be something like this -(void)scrollViewDidScroll:(UIScrollView *)scrollView { NSInteger currentIndex = self.collectionView.contentOffset.x / self.collectionView.frame.size.width; }
You can use didFinishAnimating, and set tags to viewcontrollers. try this func pageViewController(pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) { if (!completed) { return } self.pageControl.currentPageIndex = pageViewController.viewControllers!.first!.view.tag //Page Index }
import UIKit class DummyVC: UIViewController, UIScrollViewDelegate { let scrollView = UIScrollView(frame: CGRect(x:0, y:0, width:320,height: 300)) var colors:[UIColor] = [UIColor.red, UIColor.blue, UIColor.green, UIColor.yellow] var frame: CGRect = CGRect(x:0, y:0, width:0, height:0) var pageControl : UIPageControl = UIPageControl(frame: CGRect(x:50,y: 300, width:200, height:50)) override func viewDidLoad() { super.viewDidLoad() configurePageControl() scrollView.delegate = self scrollView.isPagingEnabled = true self.view.addSubview(scrollView) for index … Read more
There is an example here, and you can read the documentation here. Try downloading and running the example, then scanning through the documentation and the source code of the example to get an idea of what it is doing and how to use it. I found the above two links by searching google for “uipagecontrol” … Read more
You can create one event change page: – (IBAction)changePage:(id)sender { UIPageControl *pager=sender; int page = pager.currentPage; CGRect frame = imageGrid_scrollView.frame; frame.origin.x = frame.size.width * page; frame.origin.y = 0; [imageGrid_scrollView scrollRectToVisible:frame animated:YES]; } Bind it to Pagecontrol’s value changed event.
I’m not a fan of the accepted answer. From time to time, willDisplay cell will return the wrong page for the page control depending on users interaction. What I use: func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) { pageControl.currentPage = Int(scrollView.contentOffset.x) / Int(scrollView.frame.width) } This will update the page after the user has finished scrolling thus making the … Read more
Maybe this works for you Don’t forget to set the UIScrollView’s delegate = self (or wherever you have the selector below). – (void)scrollViewDidScroll:(UIScrollView *)scrollView { CGFloat pageWidth = self.scrollView.frame.size.width; // you need to have a **iVar** with getter for scrollView float fractionalPage = self.scrollView.contentOffset.x / pageWidth; NSInteger page = lround(fractionalPage); self.pageControl.currentPage = page; // you … Read more
The page control is only displayed if the datasource implements these methods: presentationCountForPageViewController: presentationIndexForPageViewController: Simply remove your implementation of these, and the page control will not be displayed. From the datasource docs: If both of the methods in “Supporting a Page Indicator” are implemented and the page view controller’s transition style is UIPageViewControllerTransitionStyleScroll, a page … Read more
I didn’t have the rep to comment on the answer that originated this, but I really like it. I improved the code and converted it to swift for the below subclass of UIPageViewController: class UIPageViewControllerWithOverlayIndicator: UIPageViewController { override func viewDidLayoutSubviews() { for subView in self.view.subviews as! [UIView] { if subView is UIScrollView { subView.frame = … Read more