I am trying to set an image for UIPageControl dots.
I need to change the default dots, instead of that I need an image. I used the below code
self.pageCtrl.currentPageIndicatorTintColor = UIColor.init(patternImage: UIImage(named: "Page Indicator_Selected")!)
self.pageCtrl.pageIndicatorTintColor = UIColor.init(patternImage: UIImage(named: "Page Indicator_Normal")!)
I could set the image in Pagecontrol but, it is overlapping with default dots.
I improved Agent Smith's answer to work with any number of pages. You can customize the images on xibs/storyboards.
class CustomPageControl: UIPageControl {
@IBInspectable var currentPageImage: UIImage?
@IBInspectable var otherPagesImage: UIImage?
override var numberOfPages: Int {
didSet {
updateDots()
}
}
override var currentPage: Int {
didSet {
updateDots()
}
}
override func awakeFromNib() {
super.awakeFromNib()
pageIndicatorTintColor = .clear
currentPageIndicatorTintColor = .clear
clipsToBounds = false
}
private func updateDots() {
for (index, subview) in subviews.enumerated() {
let imageView: UIImageView
if let existingImageview = getImageView(forSubview: subview) {
imageView = existingImageview
} else {
imageView = UIImageView(image: otherPagesImage)
imageView.center = subview.center
subview.addSubview(imageView)
subview.clipsToBounds = false
}
imageView.image = currentPage == index ? currentPageImage : otherPagesImage
}
}
private func getImageView(forSubview view: UIView) -> UIImageView? {
if let imageView = view as? UIImageView {
return imageView
} else {
let view = view.subviews.first { (view) -> Bool in
return view is UIImageView
} as? UIImageView
return view
}
}
}
This approach works for me. I create a custom pageControl class and change the images for dots to be any custom image.
In the code below I changed the image for the first dot in pageControl with any custom image.
You can change updateDots() method as per your needs.
Hope it helps!!!
override func viewDidLoad() {
super.viewDidLoad()
let pageControl = CustomPageControl(frame: CGRect(x: 100, y: 100, width: 104, height: 40))
pageControl.numberOfPages = 5
pageControl.currentPage = 0
self.view.addSubview(pageControl)
}
class CustomPageControl: UIPageControl {
var imageToBeReplacedByDot: UIImage {
return // Image you want to replace with dots
}
var circleImage: UIImage {
return //Default Image
}
override var numberOfPages: Int {
didSet {
updateDots()
}
}
override var currentPage: Int {
didSet {
updateDots()
}
}
override func awakeFromNib() {
super.awakeFromNib()
self.pageIndicatorTintColor = UIColor.clear
self.currentPageIndicatorTintColor = UIColor.clear
self.clipsToBounds = false
}
func updateDots() {
var i = 0
for view in self.subviews {
var imageView = self.imageView(forSubview: view)
if imageView == nil {
if i == 0 {
imageView = UIImageView(image: imageToBeReplacedByDot)
} else {
imageView = UIImageView(image: circleImage)
}
imageView!.center = view.center
view.addSubview(imageView!)
view.clipsToBounds = false
}
if i == self.currentPage {
imageView!.alpha = 1.0
} else {
imageView!.alpha = 0.5
}
i += 1
}
}
fileprivate func imageView(forSubview view: UIView) -> UIImageView? {
var dot: UIImageView?
if let dotImageView = view as? UIImageView {
dot = dotImageView
} else {
for foundView in view.subviews {
if let imageView = foundView as? UIImageView {
dot = imageView
break
}
}
}
return dot
}
}
来源:https://stackoverflow.com/questions/47279137/custom-pagecontrol-image-swift