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
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: "ic_120x120")!
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()
}
}
@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)
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)
Found another way.. I use apple's UIImage+ImageEffects.
UIImage *effectImage = [image applyExtraLightEffect];
self.imageView.image = effectImage;
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)
}
You should always use .dark for style and add the following code to make it look cool
blurEffectView.backgroundColor = .black
blurEffectView.alpha = 0.4