Created
July 13, 2018 07:48
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Custom UIPageControl for replacing the default circles with desired icons
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class CustomPageControl: UIPageControl { | |
// active and inactive images | |
let imgActive: UIImage = #imageLiteral(resourceName: "activeImage").withRenderingMode(.alwaysTemplate) | |
let imgInactive: UIImage = #imageLiteral(resourceName: "inactiveImage") | |
// adjust these parameters for specific case | |
let customActiveYOffset: CGFloat = 5.0 | |
let customInactiveYOffset: CGFloat = 3.0 | |
var hasCustomTintColor: Bool = false | |
let customActiveDotColor: UIColor = UIColor(rgb: 0xe62f3e, alphaVal: 1.0) | |
override var numberOfPages: Int { | |
didSet { | |
updateDots() | |
} | |
} | |
override var currentPage: Int { | |
didSet { | |
updateDots() | |
} | |
} | |
override func awakeFromNib() { | |
super.awakeFromNib() | |
self.pageIndicatorTintColor = .clear | |
self.currentPageIndicatorTintColor = .clear | |
self.clipsToBounds = false | |
} | |
func updateDots() { | |
var i = 0 | |
let activeSize = self.imgActive.size | |
let inactiveSize = self.imgInactive.size | |
let activeRect = CGRect(x: 0, y: 0, width: activeSize.width / 2, height: activeSize.height / 2) | |
let inactiveRect = CGRect(x: 0, y: 0, width: inactiveSize.width, height: inactiveSize.height) | |
for view in self.subviews { | |
if let imageView = self.imageForSubview(view) { | |
if i == self.currentPage { | |
imageView.image = self.imgActive | |
if self.hasCustomTintColor { | |
imageView.tintColor = customActiveDotColor | |
} | |
imageView.frame = activeRect | |
imageView.frame.origin.y = imageView.frame.origin.y - customActiveYOffet | |
} else { | |
imageView.image = self.imgInactive | |
imageView.frame = inactiveRect | |
imageView.frame.origin.y = imageView.frame.origin.y - customInactiveYOffset | |
} | |
i = i + 1 | |
} else { | |
var dotImage = self.imgInactive | |
if i == self.currentPage { | |
dotImage = self.imgActive | |
} | |
view.clipsToBounds = false | |
let addedImageView: UIImageView = UIImageView(image: dotImage) | |
if dotImage == self.imgActive { | |
addedImageView.frame = activeRect | |
addedImageView.frame.origin.y = addedImageView.frame.origin.y - customActiveYOffet | |
if self.hasCustomTintColor { | |
addedImageView.tintColor = customActiveDotColor | |
} | |
} else { | |
addedImageView.frame.origin.y = addedImageView.frame.origin.y - customInactiveYOffset | |
} | |
view.addSubview(addedImageView) | |
i = i + 1 | |
} | |
} | |
} | |
func imageForSubview(_ 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 | |
} |
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This has some issue, the image's origin.x has not set up correctly.