CODEWITHSUNDEEP
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Adrian
Adrian

Reputation: 16715

Shadows not drawing on UIButtons

I'm refactoring a Swift 3 project to Swift 4 and I've encountered a situation where buttons that previously had a shadows applied to them no longer draw a shadow.

I'm using this code to draw the shadow:

extension UIButton {  
  func drawShadow() {
    self.layer.drawsAsynchronously = true
    self.layer.masksToBounds = false
    self.layer.shadowColor = UIColor.black.cgColor
    self.layer.shadowOffset = CGSize.zero
    self.layer.shadowRadius = self.layer.cornerRadius
    self.layer.shadowOpacity = 0.5    
  }
}

I call the code to draw the shadow in viewDidLayoutSubviews using this code:

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    buttonArray = [self.buttonOne, self.buttonTwo, self.buttonThree, self.buttonFour]
    buttonArray.forEach { button in
      button.subviews.filter{$0 is UIImageView}.forEach({ imageView in
        imageView.contentMode = .scaleAspectFit
      })
      button.clipsToBounds = false
      button.drawShadow()
    }
}

I've tried addding the code in viewDidLayoutSubviews in other spots to see if I can get it to draw. I've tried viewDidLoad, viewWillLayoutSubviews, viewDidAppear, etc. I've tried nuking the storyboard and "starting over", by laying out the buttons again, cleaning derived data, nuking the simulator from both terminal and within Xcode.

The buttons are contained within a UIStackView. I've got two horizontal stackviews containing two buttons embedded within a vertical stackview. If anyone's got any suggestions re: what else to try, I welcome your suggestions. Thank you for reading.

Upvotes: 0

Views: 142

Answers (1)

Siyavash
Siyavash

Reputation: 980

Please try this code, I have changed the shadowOffset

func drawShadow() {
    self.layer.drawsAsynchronously = true
    self.layer.masksToBounds = false
    self.layer.shadowColor = UIColor.black.cgColor
    self.layer.shadowOffset = CGSize(width: 1.0, height: 2.0)
    self.layer.shadowRadius = self.layer.cornerRadius
    self.layer.shadowOpacity = 0.5    
  }

Upvotes: 1

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