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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
import UIKit
import UIHelpers
public class AsyncImageView: UIView {
private lazy var imageView: UIImageView = {
let imageView = UIImageView()
imageView.contentMode = .scaleAspectFill
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
private lazy var activityIndicator = UIActivityIndicatorView(style: .large)
private lazy var loader = ImageLoader.shared
public var defaultImage: UIImage? {
didSet {
imageView.image = defaultImage
}
}
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
commonInit()
}
func commonInit() {
addSubview(imageView)
addSubview(activityIndicator)
activityIndicator.hidesWhenStopped = true
activityIndicator.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
imageView.topAnchor.constraint(equalTo: topAnchor),
imageView.bottomAnchor.constraint(equalTo: bottomAnchor),
imageView.leadingAnchor.constraint(equalTo: leadingAnchor),
imageView.trailingAnchor.constraint(equalTo: trailingAnchor),
activityIndicator.centerXAnchor.constraint(equalTo: centerXAnchor),
activityIndicator.centerYAnchor.constraint(equalTo: centerYAnchor)
])
}
public func load(imageURL: URL, defaultImage: UIImage) {
activityIndicator.startAnimating()
loader.loadImage(imageURL) { [weak self] result in
DispatchQueue.main.async {
switch result {
case .success(let image):
self?.activityIndicator.stopAnimating()
self?.imageView.image = image
case .failure:
self?.activityIndicator.stopAnimating()
self?.imageView.image = defaultImage
}
}
}
}
}