Adding blur effect to background in swift

Question

I am setting a background image to view controller  But also i want to add blur effect to this background  How can I do this   I am setting background with following code   self view backgroundColor   UIColor patternImage  UIImage named   testBg       I found on internet for blur imageview how can i implement this to my background   var darkBlur   UIBlurEffect style  UIBlurEffectStyle Dark     2 var blurView   UIVisualEffectView effect  darkBlur  blurView frame   imageView bounds    3 imageView addSubview blurView

User · Answer

let blurEffect   UIBlurEffect style  UIBlurEffect Style dark                      let blurEffectView   UIVisualEffectView effect  blurEffect                      blurEffectView backgroundColor    black                     blurEffectView alpha   0 5                     blurEffectView frame   topView bounds                     if  self presenting                           blurEffectView frame origin x   0                       else                           blurEffectView frame origin x   -topView frame width                                           blurEffectView frame origin x   -topView frame width                     blurEffectView autoresizingMask     flexibleWidth   flexibleHeight                      UIView animate withDuration  0 2  delay  0 0  options    curveEaseIn                             if  self presenting                               blurEffectView frame origin x   -topView frame width                           else                               blurEffectView frame origin x   0                                                   view addSubview blurEffectView                        completion     status  in

User · Answer

U can also use CoreImage to create blurred image with dark effect   Make snapshot for image  func snapShotImage   - gt  UIImage       UIGraphicsBeginImageContext self frame size      if let context   UIGraphicsGetCurrentContext             self layer renderInContext context          let image   UIGraphicsGetImageFromCurrentImageContext           UIGraphicsEndImageContext           return image            return UIImage      Apply CoreImage Filters as u wish with   private func bluredImage view UIView  radius CGFloat   1  - gt  UIImage   let image   view snapShotImage    if let source   image CGImage       let context   CIContext options  nil      let inputImage   CIImage CGImage  source       let clampFilter   CIFilter name   CIAffineClamp       clampFilter  setDefaults       clampFilter  setValue inputImage  forKey  kCIInputImageKey       if let clampedImage   clampFilter  valueForKey kCIOutputImageKey  as  CIImage           let explosureFilter   CIFilter name   CIExposureAdjust           explosureFilter  setValue clampedImage  forKey  kCIInputImageKey          explosureFilter  setValue -1 0  forKey  kCIInputEVKey           if let explosureImage   explosureFilter  valueForKey kCIOutputImageKey  as  CIImage               let filter   CIFilter name   CIGaussianBlur               filter  setValue explosureImage  forKey  kCIInputImageKey              filter  setValue    radius    forKey kCIInputRadiusKey               if let result   filter  valueForKey kCIOutputImageKey  as  CIImage                   let bounds   UIScreen mainScreen   bounds                 let cgImage   context createCGImage result  fromRect  bounds                  let returnImage   UIImage CGImage  cgImage                  return returnImage                                 return UIImage

User · Answer

This one always keeps the right frame   public extension UIView         discardableResult     public func addBlur style  UIBlurEffect Style    extraLight  - gt  UIVisualEffectView           let blurEffect   UIBlurEffect style  style          let blurBackground   UIVisualEffectView effect  blurEffect          addSubview blurBackground          blurBackground translatesAutoresizingMaskIntoConstraints   false         blurBackground bottomAnchor constraint equalTo  bottomAnchor  isActive   true         blurBackground topAnchor constraint equalTo  topAnchor  isActive   true         blurBackground leadingAnchor constraint equalTo  leadingAnchor  isActive   true         blurBackground trailingAnchor constraint equalTo  trailingAnchor  isActive   true         return blurBackground

User · Answer

AlvinGeorge should just use   extension UIImageView              func blurImage                 let blurEffect   UIBlurEffect style  UIBlurEffectStyle Dark          let blurEffectView   UIVisualEffectView effect  blurEffect          blurEffectView frame   self bounds          blurEffectView autoresizingMask     FlexibleWidth   FlexibleHeight     for supporting device rotation         self addSubview blurEffectView            usage    blurredBackground frame   self view bounds  blurredBackground blurImage    self view addSubview self blurredBackground

User · Answer

This worked for me on Swift 5     let blurredView   UIVisualEffectView effect  UIBlurEffect style   light   blurredView frame   self view bounds backgroundimage addSubview blurredView

User · Answer

This Code is Working Fine For me  its for Swift 4 x  let blurEffect   UIBlurEffect style   ExtraLight  let blurEffectView   UIVisualEffectView effect  blurEffect  blurEffectView frame   self view frame self view insertSubview blurEffectView  atIndex  0

User · Answer

In a UIView extension  func addBlurredBackground style  UIBlurEffect Style        let blurEffect   UIBlurEffect style  style      let blurView   UIVisualEffectView effect  blurEffect      blurView frame   self frame     blurView autoresizingMask     flexibleWidth   flexibleHeight      self addSubview blurView      self sendSubviewToBack blurView

User · Answer

You can make an extension of UIImageView  Swift 2 0 import Foundation import UIKit  extension UIImageView       func makeBlurImage targetImageView UIImageView                 let blurEffect   UIBlurEffect style  UIBlurEffectStyle Dark          let blurEffectView   UIVisualEffectView effect  blurEffect          blurEffectView frame   targetImageView  bounds          blurEffectView autoresizingMask     FlexibleWidth   FlexibleHeight     for supporting device rotation         targetImageView  addSubview blurEffectView           Usage  override func viewDidLoad         super viewDidLoad        let sampleImageView   UIImageView frame  CGRectMake 0  200  300  325       let sampleImage UIImage   UIImage named   quot ic 120x120 quot        sampleImageView image    sampleImage        Convert To Blur Image Here     sampleImageView makeBlurImage sampleImageView       self view addSubview sampleImageView     Swift 3 Extension import Foundation import UIKit  extension UIImageView       func addBlurEffect                 let blurEffect   UIBlurEffect style  UIBlurEffectStyle light          let blurEffectView   UIVisualEffectView effect  blurEffect          blurEffectView frame   self bounds          blurEffectView autoresizingMask     flexibleWidth   flexibleHeight     for supporting device rotation         self addSubview blurEffectView           Usage  yourImageView addBlurEffect    Addendum  extension UIView            Remove UIBlurEffect from UIView   func removeBlurEffect         let blurredEffectViews   self subviews filter  0 is UIVisualEffectView      blurredEffectViews forEach  blurView in       blurView removeFromSuperview              Swift 5 0  import UIKit   extension UIImageView       func applyBlurEffect             let blurEffect   UIBlurEffect style   light          let blurEffectView   UIVisualEffectView effect  blurEffect          blurEffectView frame   bounds         blurEffectView autoresizingMask     flexibleWidth   flexibleHeight          addSubview blurEffectView

User · Answer

You should always use  dark for style and add the following code to make it look cool      blurEffectView backgroundColor    black     blurEffectView alpha   0 4

User · Answer

I have tested this code and it s working fine   let blurEffect   UIBlurEffect style  UIBlurEffect Style dark  let blurEffectView   UIVisualEffectView effect  blurEffect  blurEffectView frame   view bounds blurEffectView autoresizingMask     flexibleWidth   flexibleHeight  view addSubview blurEffectView    For Swift 3 0   let blurEffect   UIBlurEffect style  UIBlurEffectStyle dark  let blurEffectView   UIVisualEffectView effect  blurEffect  blurEffectView frame   view bounds blurEffectView autoresizingMask     flexibleWidth   flexibleHeight  view addSubview blurEffectView    For Swift 4 0   let blurEffect   UIBlurEffect style  UIBlurEffect Style dark  let blurEffectView   UIVisualEffectView effect  blurEffect  blurEffectView frame   view bounds blurEffectView autoresizingMask     flexibleWidth   flexibleHeight  view addSubview blurEffectView    Here you can see result     Or you can use this lib for that   https   github com FlexMonkey Blurable

User · Answer

Found another way   I use apple s UIImage ImageEffects    UIImage  effectImage    image applyExtraLightEffect                            self imageView image   effectImage

User · Answer

For Swift 3  iOS 10 0 and 8 0   var darkBlur UIBlurEffect   UIBlurEffect    if  available iOS 10 0         iOS 10 0 and above     darkBlur   UIBlurEffect style  UIBlurEffectStyle prominent   prominent regular extraLight  light  dark   else     iOS 8 0 and above   darkBlur   UIBlurEffect style  UIBlurEffectStyle dark    extraLight  light  dark   let blurView   UIVisualEffectView effect  darkBlur  blurView frame   self view frame   your view that have any objects blurView autoresizingMask     flexibleWidth   flexibleHeight  view addSubview blurView

[ios] Adding blur effect to background in swift

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