How to make shadow effect in circle view with cornerRadius

[pierreperrin]

How to make shadow effect in circle view with cornerRadius

[PierrePerrin]

Hi I think tou forget to paste your code.
Normally the Shadow view uses its subview to prepare the shadow.
If you set a rounded subview, you shadow should be sound.
If tou are using a sinple UIView and want a circle shadowView you need to set the shadowPath to nil or override it.

[litt1e-p]

import UIKit
import SnapKit
import ShadowView

class gView: UIView {

    override init(frame: CGRect) {
        super.init(frame: frame)
        addSubview(bgView)
        bgView.addSubview(imgView)
        bgView.snp.makeConstraints { (m) in
            m.centerX.equalTo(self)
            m.centerY.equalTo(self.snp.bottom).multipliedBy(1/3.0)
            m.width.equalTo(self).multipliedBy(1/2.0)
            m.height.equalTo(bgView.snp.width)
        }
        imgView.snp.makeConstraints { (m) in
            m.edges.equalTo(bgView)
        }
        imgView.layer.cornerRadius = self.frame.size.width / 4.0
        imgView.layer.masksToBounds = true
        bgView.shadowRadius = 10
        bgView.shadowOffset = CGSize(width: 5, height: 5)
        bgView.shadowOpacity = 0.5
    }

   func assign(with img: UIImage) {
    	bgView.updateShadow()
   }

   fileprivate lazy var bgView: ShadowView = {
        let v = ShadowView(color: .clear)
        return v
    } ()
    
    fileprivate lazy var imgView: UIImageView = {
        let iv = UIImageView(contentMode: UIViewContentMode.scaleAspectFill, image: nil)
        return iv
    } ()
}

here is my code, and it crashed

I wondering that maybe updateShadow too early?

[PierrePerrin]

Yes if you assign your image before the context is created (when the view is going to be displayed) it won't work.
I should make the context optional in order to prevent the crash.

[PierrePerrin]

Sorry, you must set a frame to the shadow view before adding it to your view.
More than that, you never set the image of your imageView.

[litt1e-p]

I modify the func assign():

func assign(with url: URL) {
    	imgView.yy_setImage(with: url, placeholder: nil, options: [], completion: { (image, url, type, stage, error) in
            if let _ = image {
                bgView.updateShadow()
            }
        })
  }

but it still not work.

[PierrePerrin]

Is shadow view working in the example ?
Do try to edit the example to make the effect you want ?
Without debugging I won't be able to help you with your problem...

[litt1e-p]

yes, I think the reason is the image of the imageView, it is nil when get asImage from CALayer.

and I wonder why get image from layer instead of getting image from imageView's subView. It works after I modify codes below:

[litt1e-p]

@PierrePerrin sorry about previous bug I made, I fixed it now by set bgView's frame and image. Thanks again

[litt1e-p]

And by the way, the version 1.2.1 is not found in cocoapods