Background
I followed this tutorial to achieve custom badges:
http://www.stefanovettor.com/2016/04/30/adding-badge-uibarbuttonitem/
Problem
The badge layer is placed underneath the UITabBarItem image. How do I place it on top of the image? I tried to insert the badge layer last with view.layer.insertSublayer but no luck.
func addBadge(number number: Int, withOffset offset: CGPoint = CGPoint.zero, andColor color: UIColor = UIColor.redColor(), andFilled filled: Bool = true) {
guard let view = self.valueForKey("view") as? UIView else { return }
// Initialize Badge
let badge = CAShapeLayer()
let radius = CGFloat(9)
let location = CGPoint(x: view.frame.width - (radius + offset.x), y: (radius + offset.y))
badge.drawCircleAtLocation(location, withRadius: radius, andColor: color, filled: filled)
view.layer.addSublayer(badge)
// Initialiaze Badge's label
let label = CATextLayer()
label.string = "\(number)"
label.alignmentMode = kCAAlignmentCenter
label.fontSize = 13
label.frame = CGRect(origin: CGPoint(x: location.x - 5, y: offset.y + 1), size: CGSize(width: 9, height: 16))
label.foregroundColor = filled ? UIColor.whiteColor().CGColor : color.CGColor
label.backgroundColor = UIColor.clearColor().CGColor
label.contentsScale = UIScreen.mainScreen().scale
badge.addSublayer(label)
}
Related
I was making a progress circle, and I want its track path to have a blur effect, is there any way to achieve that?
This is what the original track looks like(the track path is transparent, I want it to be blurred)
And this is my attempt
let outPutViewFrame = CGRect(x: 0, y: 0, width: 500, height: 500)
let circleRadius: CGFloat = 60
let circleViewCenter = CGPoint(x: outPutViewFrame.width / 2 , y: outPutViewFrame.height / 2)
let circleView = UIView()
let progressWidth: CGFloat = 8
circleView.frame.size = CGSize(width: (circleRadius + progressWidth) * 2, height: (circleRadius + progressWidth) * 2)
circleView.center = circleViewCenter
let circleTrackPath = UIBezierPath(arcCenter: CGPoint(x: circleView.frame.width / 2, y: circleView.frame.height / 2), radius: circleRadius, startAngle: -CGFloat.pi / 2, endAngle: 2 * CGFloat.pi, clockwise: true)
let blur = UIBlurEffect(style: .light)
let blurEffect = UIVisualEffectView(effect: blur)
blurEffect.frame = circleView.bounds
blurEffect.mask(withPath: circleTrackPath, inverse: false)
extension UIView {
func mask(withPath path: UIBezierPath, inverse: Bool = false) {
let maskLayer = CAShapeLayer()
if inverse {
path.append(UIBezierPath(rect: self.bounds))
maskLayer.fillRule = CAShapeLayerFillRule.evenOdd
}
maskLayer.path = path.cgPath
maskLayer.lineWidth = 5
maskLayer.lineCap = CAShapeLayerLineCap.round
self.layer.mask = maskLayer
}
}
Set maskLayer.fillRule to evenOdd, even when not inversed.
if inverse {
path.append(UIBezierPath(rect: self.bounds))
}
maskLayer.fillRule = CAShapeLayerFillRule.evenOdd
create the circleTrackPath by using a big circle and a smaller circle.
let circleCenter = CGPoint(x: circleView.frame.width / 2, y: circleView.frame.height / 2)
let circleTrackPath = UIBezierPath(ovalIn:
CGRect(origin: circleCenter, size: .zero)
.insetBy(dx: circleRadius, dy: circleRadius))
// smaller circle
circleTrackPath.append(CGRect(origin: circleCenter, size: .zero)
.insetBy(dx: circleRadius * 0.8, dy: circleRadius * 0.8))
Set circleTrackPath.usesEvenOddFillRule to true:
circleTrackPath.usesEvenOddFillRule = true
Now you have a blurred full circle. The non-blurred arc part can be implemented as another sublayer.
Here is a MCVE that you can paste into a playground:
let container = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
// change this to a view of your choice
let image = UIImageView(image: UIImage(named: "my_image"))
let blur = UIVisualEffectView(effect: UIBlurEffect(style: .light))
container.addSubview(image)
blur.frame = image.frame
container.addSubview(blur)
let outer = image.bounds.insetBy(dx: 30, dy: 30)
let path = UIBezierPath(ovalIn: outer)
path.usesEvenOddFillRule = true
path.append(UIBezierPath(ovalIn: outer.insetBy(dx: 10, dy: 10)))
let maskLayer = CAShapeLayer()
maskLayer.path = path.cgPath
maskLayer.fillRule = .evenOdd
blur.layer.mask = maskLayer
container // <--- playground quick look this
Using my profile pic as the background, this produces:
I have a button with a system image:
#IBOutlet weak var ampouleButton: UIButton!
in the viewdid load, i put this:
let ampouleButtonConfig = UIImage.SymbolConfiguration(
pointSize: 30,
weight: .regular,
scale: .large)
let ampouleButtonImage = UIImage(
systemName: "lightbulb",
withConfiguration: ampouleButtonConfig)
ampouleButton.backgroundColor = Theme.gold03 // i need to put here a gradient
ampouleButton.setImage(ampouleButtonImage, for: .normal)
ampouleButton.tintColor = Theme.blanc
ampouleButton.layer.cornerRadius = ampouleButton.frame.height / 2
ampouleButton.layer.shadowOpacity = 0.4
ampouleButton.layer.shadowRadius = 3
ampouleButton.layer.shadowOffset =
CGSize(width: 0, height: 5)
ampouleButton.alpha = 1
instead of the background color, i need to put a gradient.
i tested this but it didn't work:
let gradientLayer = CAGradientLayer()
gradientLayer.frame = self.ampouleButton.bounds
gradientLayer.colors = [UIColor.yellow.cgColor, UIColor.white.cgColor]
ampouleButton.layer.insertSublayer(gradientLayer, at: 0)
Actually, the button image goes behind the layer. Try this:
extension UIButton {
func applyGradient(colors: [CGColor], radius: CGFloat = 0, startGradient: CGPoint = .init(x: 0.5, y: 0), endGradient: CGPoint = .init(x: 0.5, y: 1)) {
// check first if there is already a gradient layer to avoid adding more than one
let gradientLayer = CAGradientLayer()
gradientLayer.cornerRadius = radius
gradientLayer.colors = colors
gradientLayer.startPoint = startGradient
gradientLayer.endPoint = endGradient
gradientLayer.frame = bounds
layer.insertSublayer(gradientLayer, at: 0)
}
}
And in the viewDidLoad put:
ampouleButton.applyGradient(colors: [Theme.bleu!.cgColor, Theme.softBlue!.cgColor], radius: self.ampouleButton.frame.height / 2, startGradient: CGPoint(x: 0, y: 0.5), endGradient: CGPoint(x: 1, y: 0))
if let imgView = ampouleButton.imageView { ampouleButton.bringSubviewToFront(imgView) }
Find applyGradient function from here : https://stackoverflow.com/a/62093932/2303865
I'm trying to make a border like this:
With this code:
self.slot1.layer.cornerRadius = self.slot1.bounds.height / 2
self.slot1.layer.borderWidth = 1.5
self.slot1.layer.borderColor = UIColor.orange.cgColor
It produces:
How can i add a "spacing" between the border and the actual image?
You can achieve this using below extension
extension UIImage {
func imageWithInsets(insets: UIEdgeInsets) -> UIImage? {
UIGraphicsBeginImageContextWithOptions(
CGSize(width: self.size.width + insets.left + insets.right,
height: self.size.height + insets.top + insets.bottom), false, self.scale)
let _ = UIGraphicsGetCurrentContext()
let origin = CGPoint(x: insets.left, y: insets.top)
self.draw(at: origin)
let imageWithInsets = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return imageWithInsets
}
}
Use below code to add space between image and border, i add here 20 you can give your own space
self.slot1.layer.cornerRadius = self.slot1.bounds.height / 2
self.slot1.layer.borderWidth = 1.5
self.slot1.layer.borderColor = UIColor.orange.cgColor
let image = self.slot1.image?.imageWithInsets(insets: UIEdgeInsets(top: 20, left: 20, bottom: 20, right: 20))
self.slot1.image = image
Hope this help!
Instead of trying to make space in between, take one UIView inside that put your UIImageView. UIImageView should have less width and height, then add corner radius to both but add border color to UIVIew only.
Your UI should be like this :
Run in playground
import PlaygroundSupport
import UIKit
let iv = UIImageView(frame: CGRect(x: 0.0, y: 0.0, width: 200, height: 200))
PlaygroundPage.current.liveView = iv
iv.backgroundColor = .blue
iv.layer.cornerRadius = 100
iv.layer.borderColor = UIColor.red.cgColor
iv.layer.borderWidth = 5
iv.layer.sublayers?.count
let layer2 = CAShapeLayer()
let newFrame = iv.bounds.insetBy(dx: 7, dy: 7)
layer2.path = UIBezierPath(roundedRect: newFrame, cornerRadius: newFrame.height / 2).cgPath
layer2.frame = iv.bounds
layer2.lineWidth = 5
layer2.strokeColor = UIColor.yellow.cgColor
layer2.fillColor = UIColor.clear.cgColor
iv.layer.addSublayer(layer2)
I am trying to change the square crop tool to circular one for the images selected from Photo Library in Swift 4. I tried many old codes available in here with no luck. Can somebody please help me.
There are mainly 2 issues in this code.
It doesn't hide the already existing square cropping area.
It shows the choose and cancel buttons under the old overlay, so cant tap on it.
Any help would be appreciated.
My code:
private func hideDefaultEditOverlay(view: UIView)
{
for subview in view.subviews
{
if let cropOverlay = NSClassFromString("PLCropOverlayCropView")
{
if subview.isKind(of: cropOverlay) {
subview.isHidden = true
break
}
else {
hideDefaultEditOverlay(view: subview)
}
}
}
}
private func addCircleOverlayToImageViewer(viewController: UIViewController) {
let circleColor = UIColor.clear
let maskColor = UIColor.black.withAlphaComponent(0.8)
let screenHeight = UIScreen.main.bounds.size.height
let screenWidth = UIScreen.main.bounds.size.width
hideDefaultEditOverlay(view: viewController.view)
let circleLayer = CAShapeLayer()
let circlePath = UIBezierPath(ovalIn: CGRect(x: 0, y: screenHeight - screenWidth, width: screenWidth, height: screenWidth))
circlePath.usesEvenOddFillRule = true
circleLayer.path = circlePath.cgPath
circleLayer.fillColor = circleColor.cgColor
let maskPath = UIBezierPath(roundedRect: CGRect(x: 0, y: 0, width: screenWidth, height: screenHeight), cornerRadius: 0)
maskPath.append(circlePath)
maskPath.usesEvenOddFillRule = true
let maskLayer = CAShapeLayer()
maskLayer.path = maskPath.cgPath
maskLayer.fillRule = kCAFillRuleEvenOdd
maskLayer.fillColor = maskColor.cgColor
viewController.view.layer.addSublayer(maskLayer)
// Move and Scale label
let label = UILabel(frame: CGRect(x: 0, y: 20, width: view.frame.width, height: 50))
label.text = "Move and Scale"
label.textAlignment = .center
label.textColor = UIColor.white
viewController.view.addSubview(label)
}
I am trying to display a fraction as something like 1/2 but I want to line to be horizontal so the fraction looks more fraction like, some thing like this:
1
_
2
However with no massive space and in a way that I can use it inside one UILabel (which can have multiple lines). I also need to be able to put a fraction as the numerator/denominator of a fraction and so on. Any suggestions? (Fonts, characters...)
Thank you,
Gleb Koval
Here's a UIView subclass that draws a fraction:
class FractionView: UIView {
var font: UIFont = UIFont.systemFont(ofSize: 16) {
didSet { self.setNeedsDisplay() }
}
var numerator: Int = 1 {
didSet { self.setNeedsDisplay() }
}
var denominator: Int = 2{
didSet { self.setNeedsDisplay() }
}
var spacing: CGFloat = 5{
didSet { self.setNeedsDisplay() }
}
override func draw(_ rect: CGRect) {
let numString = "\(numerator)" as NSString
let numWidth = numString.size(withAttributes: [.font: font]).width
let denomString = "\(denominator)" as NSString
let denomWidth = denomString.size(withAttributes: [.font: font]).width
let numX: CGFloat
let denomX: CGFloat
if numWidth <= denomWidth {
denomX = 0
numX = (denomWidth - numWidth) / 2
} else {
denomX = (numWidth - denomWidth) / 2
numX = 0
}
numString.draw(at: CGPoint(x: numX, y: 0), withAttributes: [.font : font])
let path = UIBezierPath()
path.move(to: CGPoint(x: 0, y: font.lineHeight + spacing))
path.addLine(to: CGPoint(x: self.frame.maxX, y: font.lineHeight + spacing))
UIColor.black.setStroke()
path.lineWidth = 1
path.stroke()
denomString.draw(at: CGPoint(x: denomX, y: font.lineHeight + spacing * 2), withAttributes: [.font: font])
}
}
// usage:
let width = ("12" as NSString).size(withAttributes: [.font: UIFont.systemFont(ofSize: 16)]).width
let view = FractionView(frame: CGRect(x: 0, y: 0, width: width, height: 48))
view.backgroundColor = .white
view.denominator = 12
As Sulthan in comments has suggested, using an NSAttributedString would be an easier approach:
let attrString = NSMutableAttributedString(string: "1", attributes: [NSAttributedStringKey.underlineStyle : 1])
attrString.append(NSAttributedString(string: "\n2"))
attrString
let label = UILabel(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
label.attributedText = attrString
label.numberOfLines = 2