创建一个垂直UIPageControl

Question

任何人都知道如何创建垂直UIPageControl？我有一个启用了分页的UIScrollView，我希望UIPageControl位于侧面并垂直显示而不是水平显示。

提前谢谢你......

Answer 1

您可以将旋转变换应用于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)

Answer 2

Swift 3.1的更新

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

Answer 3

您可以使用UICollectionView启用分页和垂直滚动。这会自动处理垂直分页。

Answer 4

页面控件有子视图，必须旋转才能形成垂直点

//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)
}