add Shadow on UIView using swift 3

Question

prior swift 3 i was adding shadow in my UIView like this      toolbar is an UIToolbar  UIView  toolbar layer masksToBounds   false toolbar layer shadowOffset   CGSize width  -1  height  1  toolbar layer shadowRadius   1 toolbar layer shadowOpacity   0 5   but the above code is not working in swift 3   instead of shadow my whole View s color is turned to ugly gray  anyone knows how can we add shadow in swift 3

User · Answer

loginView layer shadowOpacity   1 0

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This works for me  Swift 3 and 4   yourView layer shadowColor   UIColor gray cgColor yourView layer shadowOpacity   0 3 yourView layer shadowOffset   CGSize zero yourView layer shadowRadius   6

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func shadow Vw   UIView                Vw layer masksToBounds   false         Vw layer shadowColor    colorLiteral red  0 5058823529  green  0 5333333333  blue  0 6117647059  alpha  1          Vw layer shadowOffset   CGSize width  0  height  1          Vw layer shadowRadius   5 0         Vw layer shadowOpacity   15 0         Vw layer cornerRadius   5 0

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If you want to use it as a IBInspectable property for your views you can add this extension  import UIKit  extension UIView        private static var  addShadow Bool   false       IBInspectable var addShadow Bool           get               return UIView  addShadow                   set newValue                if newValue    true                   layer masksToBounds   false                 layer shadowColor   UIColor black cgColor                 layer shadowOpacity   0 075                 layer shadowOffset   CGSize width  0  height  -3                  layer shadowRadius   1                  layer shadowPath   UIBezierPath rect  bounds  cgPath                 layer shouldRasterize   true                 layer rasterizationScale    UIScreen main scale

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I will suggest you to use below the library because it allows you to set default values in one file and you can use it everywhere in the project without making one line of change  https   github com Shahbaz89khan ShadowView

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After spent lot of hours  I just find out the solution  just add this simple line   backgroundColor    white  Hope this help you

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Shadow using UIView Extension Swift 4 I would like to add one more line with selected answer  When we rasterizing the layer  It needs to be set to 2 0 for retina displays  Otherwise label text or images on that view will be blurry  So we need to add rasterizationScale also    extension UIView        func dropShadow             layer masksToBounds   false         layer shadowColor   UIColor black cgColor         layer shadowOpacity   0 5         layer shadowOffset   CGSize width  -1  height  1          layer shadowRadius   1         layer shadowPath   UIBezierPath rect  self bounds  cgPath         layer shouldRasterize   true         layer rasterizationScale   UIScreen main scale

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Please Try this  func applyShadowOnView   view  UIView        view layer cornerRadius   8     view layer shadowColor   UIColor darkGray cgColor     view layer shadowOpacity   1     view layer shadowOffset    zero     view layer shadowRadius   5

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Please try this  it s working for me   extension UIView     func dropShadow          layer shadowColor   UIColor black cgColor     layer shadowOffset   CGSize width  2  height  3      layer masksToBounds   false      layer shadowOpacity   0 3     layer shadowRadius   3       layer shadowPath   UIBezierPath rect  bounds  cgPath     layer rasterizationScale   UIScreen main scale     layer shouldRasterize   true

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If you need rounded shadow  Works for swift 4 2  extension UIView            func dropShadow                  var shadowLayer  CAShapeLayer              let cornerRadius  CGFloat   16 0             let fillColor  UIColor    white              if shadowLayer    nil                   shadowLayer   CAShapeLayer                    shadowLayer path   UIBezierPath roundedRect  bounds  cornerRadius  cornerRadius  cgPath                 shadowLayer fillColor   fillColor cgColor                  shadowLayer shadowColor   UIColor black cgColor                 shadowLayer shadowPath   shadowLayer path                 shadowLayer shadowOffset   CGSize width  -2 0  height  2 0                  shadowLayer shadowOpacity   0 8                 shadowLayer shadowRadius   2                  layer insertSublayer shadowLayer  at  0                                  Swift 4 rounded UIView with shadow

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Very simple and few lines of code   let viewShadow   UIView frame  CGRect x  0  y  0  width  200  height  200   viewShadow center   self view center viewShadow backgroundColor   UIColor yellow viewShadow layer shadowColor   UIColor red cgColor viewShadow layer shadowOpacity   1 viewShadow layer shadowOffset   CGSize zero viewShadow layer shadowRadius   5 self view addSubview viewShadow    Look like

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Swift 5  Just call this function and pass your view  public func setViewSettingWithBgShade view  UIView        view layer cornerRadius   8     view layer borderWidth   1     view layer borderColor   AppTextFieldBorderColor cgColor        MARK - Shade a view     view layer shadowOpacity   0 5     view layer shadowOffset   CGSize width  1 0  height  1 0      view layer shadowRadius   3 0     view layer shadowColor   UIColor black cgColor     view layer masksToBounds   false

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CODE SNIPPET     extension UIView         OUTPUT 1   func dropShadow scale  Bool   true        layer masksToBounds   false     layer shadowColor   UIColor black cgColor     layer shadowOpacity   0 5     layer shadowOffset   CGSize width  -1  height  1      layer shadowRadius   1      layer shadowPath   UIBezierPath rect  bounds  cgPath     layer shouldRasterize   true     layer rasterizationScale   scale   UIScreen main scale   1           OUTPUT 2   func dropShadow color  UIColor  opacity  Float   0 5  offSet  CGSize  radius  CGFloat   1  scale  Bool   true        layer masksToBounds   false     layer shadowColor   color cgColor     layer shadowOpacity   opacity     layer shadowOffset   offSet     layer shadowRadius   radius      layer shadowPath   UIBezierPath rect  self bounds  cgPath     layer shouldRasterize   true     layer rasterizationScale   scale   UIScreen main scale   1            NOTE  If you don t pass any parameter to that function  then the scale argument will be true by default  You can define a default value for any parameter in a function by assigning a value to the parameter after that parameter   s type  If a default value is defined  you can omit that parameter when calling the function     OUTPUT 1   shadowView dropShadow       OUTPUT 2   shadowView dropShadow color   red  opacity  1  offSet  CGSize width  -1  height  1   radius  3  scale  true         layer shouldRasterize   true will make the shadow static and cause a shadow for the initial state of the UIView  So I would recommend not to use layer shouldRasterize   true in dynamic layouts like view inside a UITableViewCell

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Applies shadow over the View    func applyShadowOnView   view UIView             view layer cornerRadius   8         view layer shadowColor   UIColor darkGray cgColor         view layer shadowOpacity   1         view layer shadowOffset   CGSize zero         view layer shadowRadius   5

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We can apply drop shadow by following way also      cell view1 layer masksToBounds   false     cell view1 layer shadowColor   UIColor lightGray cgColor     cell view1 backgroundColor   UIColor white     cell view1 layer shadowOffset   CGSize width  1 0  height  1 0      cell view1 layer shadowOpacity   0 5   Result will be   http   prntscr com nhhv2s

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Very easy to use extension for UIView  editable directly from storyboard  Swift 4    IBDesignable extension UIView        IBInspectable var shadowColor  UIColor           set               guard let uiColor   newValue else   return               layer shadowColor   uiColor cgColor                   get              guard let color   layer shadowColor else   return nil               return UIColor cgColor  color                        IBInspectable var shadowOpacity  Float          set               layer shadowOpacity   newValue                   get              return layer shadowOpacity                       IBInspectable var shadowOffset  CGSize          set               layer shadowOffset   newValue                   get              return layer shadowOffset                       IBInspectable var shadowRadius  CGFloat          set               layer shadowRadius   newValue                   get              return layer shadowRadius

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Swift 4  toolbar layer shadowColor   UIColor hex hexColor    000000   withAlpha  1 0  cgColor toolbar layer shadowOffset   CGSize zero toolbar layer shadowRadius   1 toolbar layer shadowOpacity   1 toolbar layer shouldRasterize   true toolbar layer masksToBounds   false

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Although the accepted answer is great and it works as it should  I ve modified it to split offSet  CGSize to offsetX  CGFloat and offsetY  CGFloat   extension UIView     func dropShadow offsetX  CGFloat  offsetY  CGFloat  color  UIColor  opacity  Float  radius  CGFloat  scale  Bool   true        layer masksToBounds   false     layer shadowOffset   CGSize width  offsetX  height  offsetY      layer shadowColor   color cgColor     layer shadowOpacity   opacity     layer shadowRadius   radius     layer shadowPath   UIBezierPath rect  self bounds  cgPath     layer shouldRasterize   true     layer rasterizationScale   scale   UIScreen main scale   1

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