Creating a Vertical UIPageControl

Anyone have an idea how to create a vertical UIPageControl? I have a UIScrollView with pagination enabled and I would like to have the UIPageControl sit on the side and appear vertically instead of horizontally.

Thank you in开发者_如何转开发 advance...

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You can apply a rotation transformation to the UIPageControl.

pageControl.transform = CGAffineTransformMakeRotation(M_PI_2);

Swift 3.0

let angle = CGFloat(M_PI_2)
pageControl.transform = CGAffineTransform(rotationAngle: angle)

Swift 4.0

let angle = CGFloat.pi/2
    pageControl.transform = CGAffineTransform(rotationAngle: angle)

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Update for Swift 3.1

pageControl.transform = pageControl.transform.rotated(by: .pi/2)

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You can use UICollectionView with paging enabled and vertical scroll. This handles the vertical pagination automatically.

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page control has subviews, which must be rotated to make vertical dots

//create page control

    private let pageControl: UIPageControl = {
    let pageControl = UIPageControl()
    pageControl.numberOfPages = 3
    return pageControl
}()

//add page control as a subview to container UIView

override func viewDidLoad() {
     pageViewContainer.addSubview(pageControl)
}

//rotate it vertically

override func viewWillLayoutSubviews() {
    pageControl.frame = pageViewContainer.bounds
    pageControl.subviews.last?.transform = CGAffineTransform(rotationAngle: CGFloat.pi/2)
    pageControl.subviews.first?.transform = CGAffineTransform(rotationAngle: CGFloat.pi/2)
}