[ios] 신속하게 배경에 흐림 효과 추가

컨트롤러를 볼 배경 이미지를 설정하고 있습니다. 하지만이 배경에 블러 효과를 추가하고 싶습니다. 어떻게 할 수 있습니까?

다음 코드로 배경을 설정하고 있습니다.

self.view.backgroundColor = UIColor(patternImage: UIImage(named: "testBg")!)

인터넷에서 흐림 imageview를 찾았습니다.이를 내 배경에 어떻게 구현할 수 있습니까?

var darkBlur = UIBlurEffect(style: UIBlurEffectStyle.Dark)
// 2
var blurView = UIVisualEffectView(effect: darkBlur)
blurView.frame = imageView.bounds
// 3
imageView.addSubview(blurView)

답변

이 코드를 테스트했으며 정상적으로 작동합니다.

let blurEffect = UIBlurEffect(style: UIBlurEffect.Style.dark)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = view.bounds
blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
view.addSubview(blurEffectView)

Swift 3.0의 경우 :

let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.dark)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = view.bounds
blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
view.addSubview(blurEffectView)

Swift 4.0의 경우 :

let blurEffect = UIBlurEffect(style: UIBlurEffect.Style.dark)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = view.bounds
blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
view.addSubview(blurEffectView)

여기에서 결과를 볼 수 있습니다.

흐릿한보기

또는이 lib를 사용할 수 있습니다.

https://github.com/FlexMonkey/Blurable

답변

UIImageView를 확장 할 수 있습니다.

스위프트 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)
    }
}

용법:

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 확장

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)
    }
}

용법:

yourImageView.addBlurEffect()

추가:

extension UIView {

  /// Remove UIBlurEffect from UIView
  func removeBlurEffect() {
    let blurredEffectViews = self.subviews.filter{$0 is UIVisualEffectView}
    blurredEffectViews.forEach{ blurView in
      blurView.removeFromSuperview()
    }
  }

답변

@AlvinGeorge 는 다음을 사용해야합니다.

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)
    }
}

사용법 :

 blurredBackground.frame = self.view.bounds
 blurredBackground.blurImage()
 self.view.addSubview(self.blurredBackground)

답변

Swift 3 (iOS 10.0 및 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)

답변

U는 CoreImage를 사용하여 어두운 효과로 흐린 이미지를 만들 수도 있습니다.

이미지 용 스냅 샷 만들기

func snapShotImage() -> UIImage {
    UIGraphicsBeginImageContext(self.frame.size)
    if let context = UIGraphicsGetCurrentContext() {
        self.layer.renderInContext(context)
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }

    return UIImage()
}

원하는대로 CoreImage 필터 적용

private func bluredImage(view:UIView, radius:CGFloat = 1) -> 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()
}

답변

이것은 Swift 5 에서 나를 위해 일했습니다.

let blurredView = UIVisualEffectView(effect: UIBlurEffect(style: .light))
blurredView.frame = self.view.bounds
backgroundimage.addSubview(blurredView)

답변

이것은 항상 올바른 프레임을 유지합니다.

public extension UIView {

    @discardableResult
    public func addBlur(style: UIBlurEffect.Style = .extraLight) -> 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
    }
}