Pertanyaan Menambahkan efek buram ke latar belakang dengan cepat


Saya menetapkan gambar latar belakang untuk melihat pengontrol. Tetapi saya juga ingin menambahkan efek blur ke latar belakang ini. Bagaimana saya bisa melakukan ini?

Saya menetapkan latar belakang dengan kode berikut:

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

Saya menemukan di internet untuk blur imageview bagaimana saya bisa menerapkan ini ke latar belakang saya?

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

74
2018-06-20 10:59


asal


Jawaban:


Saya telah menguji kode ini dan ini berfungsi dengan baik:

let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.Dark)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = view.bounds
blurEffectView.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]
view.addSubview(blurEffectView)

Untuk 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)

Di sini Anda dapat melihat hasilnya:

blurred view

Atau Anda dapat menggunakan lib ini untuk itu:

https://github.com/FlexMonkey/Blurable


234
2018-06-20 11:30



Anda dapat membuat ekstensi dari 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)
    }
}

Pemakaian:

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)
    }
}

Pemakaian:

yourImageView.addBlurEffect()

Tambahan:

extension UIView {

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

37
2018-03-08 12:19



@AlvinGeorge hanya harus menggunakan:

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)
    }
}

pemakaian:

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

12
2018-04-26 10:23



Untuk Swift 3 (iOS 10.0 dan 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)

10
2017-10-06 04:26



Anda juga dapat menggunakan CoreImage untuk membuat gambar buram dengan efek gelap

  1. Buat snapshot untuk gambar

    func snapShotImage() -> UIImage {
        UIGraphicsBeginImageContext(self.frame.size)
        if let context = UIGraphicsGetCurrentContext() {
            self.layer.renderInContext(context)
            let image = UIGraphicsGetImageFromCurrentImageContext()
            UIGraphicsEndImageContext()
            return image
        }
    
        return UIImage()
    }
    
  2. Terapkan Filter CoreImage sesuai keinginan Anda

    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()
    }
    

5
2017-09-20 08:23



Menemukan cara lain .. Saya menggunakan UIImage + ImageEffects dari Apple.

 UIImage *effectImage = [image applyExtraLightEffect];                        
 self.imageView.image = effectImage;

1
2017-09-22 18:08