XCode Page View Controller: make dots transparent - xcode

Question

i have added a page view controller and a 3 pages.
I set Transition Style to Scroll and implemented the presentationCount and the presentationIndex method. now i get a black bar with gray/white dots at the bottom of my view. However, but i want the view to goright to the bottom and the make the dots appear over it(without the black background.
How do i do that?
here is my code:
import UIKit
class FilterViewController: UIPageViewController, UIPageViewControllerDataSource {
override func viewDidLoad() {
super.viewDidLoad()
dataSource = self
if let firstViewController = orderedViewControllers.first {
setViewControllers([firstViewController],
direction: .forward,
animated: true,
completion: nil)
}
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
private(set) lazy var orderedViewControllers: [UIViewController] = {
return [self.newViewController(category: "first"),
self.newViewController(category: "second"),
self.newViewController(category: "third")]
}()
private func newViewController(category: String) -> UIViewController {
return UIStoryboard(name: "Main", bundle: nil) .
instantiateViewController(withIdentifier: "\(category)ViewController")
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = orderedViewControllers.index(of: viewController) else {
return nil
}
let previousIndex = viewControllerIndex - 1
guard previousIndex >= 0 else {
return orderedViewControllers.last
}
guard orderedViewControllers.count > previousIndex else {
return nil
}
return orderedViewControllers[previousIndex]
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = orderedViewControllers.index(of: viewController) else {
return nil
}
let nextIndex = viewControllerIndex + 1
let orderedViewControllersCount = orderedViewControllers.count
guard orderedViewControllersCount != nextIndex else {
return orderedViewControllers.first
}
guard orderedViewControllersCount > nextIndex else {
return nil
}
return orderedViewControllers[nextIndex]
}
func presentationCount(for pageViewController: UIPageViewController) -> Int {
return orderedViewControllers.count
}
func presentationIndex(for pageViewController: UIPageViewController) -> Int {
guard let firstViewController = viewControllers?.first,
let firstViewControllerIndex = orderedViewControllers.index(of: firstViewController) else {
return 0
}
return firstViewControllerIndex
}
}

Answer 1

ok, i got it myself. If anyone has the same problem, just override the viewDidLayoutSubviews() of the Page View Controller:
override func viewDidLayoutSubviews() {
let v = self.view
let subviews = v?.subviews
if subviews?.count == 2 {
var sv:UIScrollView?
var pc:UIPageControl?
for t in subviews! {
if t is UIScrollView {
sv = t as! UIScrollView
} else {
pc = t as! UIPageControl
}
}
if(sv != nil && pc != nil) {
sv?.frame = (v?.bounds)!
v?.bringSubview(toFront: pc!)
}
}
super.viewDidLayoutSubviews()
}