//
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// UIImageViewExtensions.swift
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// SwifterSwift
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//
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// Created by Omar Albeik on 8/25/16.
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// Copyright © 2016 SwifterSwift
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//
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#if canImport(UIKit) && !os(watchOS)
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import UIKit
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// MARK: - Methods
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public extension UIImageView {
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/// SwifterSwift: Set image from a URL.
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///
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/// - Parameters:
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/// - url: URL of image.
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/// - contentMode: imageView content mode (default is .scaleAspectFit).
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/// - placeHolder: optional placeholder image
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/// - completionHandler: optional completion handler to run when download finishs (default is nil).
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func download(
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from url: URL,
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contentMode: UIView.ContentMode = .scaleAspectFit,
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placeholder: UIImage? = nil,
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completionHandler: ((UIImage?) -> Void)? = nil) {
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image = placeholder
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self.contentMode = contentMode
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URLSession.shared.dataTask(with: url) { (data, response, _) in
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guard
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let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
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let mimeType = response?.mimeType, mimeType.hasPrefix("image"),
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let data = data,
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let image = UIImage(data: data)
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else {
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completionHandler?(nil)
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return
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}
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DispatchQueue.main.async { [unowned self] in
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self.image = image
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completionHandler?(image)
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}
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}.resume()
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}
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/// SwifterSwift: Make image view blurry
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///
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/// - Parameter style: UIBlurEffectStyle (default is .light).
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func blur(withStyle style: UIBlurEffect.Style = .light) {
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let blurEffect = UIBlurEffect(style: style)
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let blurEffectView = UIVisualEffectView(effect: blurEffect)
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blurEffectView.frame = bounds
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blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight] // for supporting device rotation
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addSubview(blurEffectView)
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clipsToBounds = true
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}
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/// SwifterSwift: Blurred version of an image view
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///
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/// - Parameter style: UIBlurEffectStyle (default is .light).
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/// - Returns: blurred version of self.
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func blurred(withStyle style: UIBlurEffect.Style = .light) -> UIImageView {
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let imgView = self
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imgView.blur(withStyle: style)
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return imgView
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}
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}
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#endif
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