91 lines
3.1 KiB
Swift
91 lines
3.1 KiB
Swift
//
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// FLAnimatedImageView.swift
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// FLAnimatedImageView
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//
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// Created by Cirno MainasuK on 2021-8-20.
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// Copyright © 2021 Twidere. All rights reserved.
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//
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import Foundation
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import Combine
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import Alamofire
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import AlamofireImage
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import FLAnimatedImage
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private enum FLAnimatedImageViewAssociatedKeys {
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static var activeAvatarRequestURL = "FLAnimatedImageViewAssociatedKeys.activeAvatarRequestURL"
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static var avatarRequestCancellable = "FLAnimatedImageViewAssociatedKeys.avatarRequestCancellable"
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}
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extension FLAnimatedImageView {
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public var activeAvatarRequestURL: URL? {
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get {
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objc_getAssociatedObject(self, &FLAnimatedImageViewAssociatedKeys.activeAvatarRequestURL) as? URL
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}
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set {
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objc_setAssociatedObject(self, &FLAnimatedImageViewAssociatedKeys.activeAvatarRequestURL, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
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}
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}
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public var avatarRequestCancellable: AnyCancellable? {
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get {
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objc_getAssociatedObject(self, &FLAnimatedImageViewAssociatedKeys.avatarRequestCancellable) as? AnyCancellable
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}
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set {
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objc_setAssociatedObject(self, &FLAnimatedImageViewAssociatedKeys.avatarRequestCancellable, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
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}
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}
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public func setImage(
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url: URL?,
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placeholder: UIImage?,
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scaleToSize: CGSize?
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) {
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// cancel task
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cancelTask()
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// set placeholder
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image = placeholder
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// set image
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guard let url = url else { return }
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activeAvatarRequestURL = url
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let avatarRequest = AF.request(url).publishData()
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avatarRequestCancellable = avatarRequest
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.sink { response in
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switch response.result {
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case .success(let data):
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DispatchQueue.global().async {
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let image: UIImage? = {
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if let scaleToSize = scaleToSize {
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return UIImage(data: data)?.af.imageScaled(to: scaleToSize, scale: UIScreen.main.scale)
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} else {
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return UIImage(data: data)
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}
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}()
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let animatedImage = FLAnimatedImage(animatedGIFData: data)
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DispatchQueue.main.async { [weak self] in
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guard let self = self else { return }
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if self.activeAvatarRequestURL == url {
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if let animatedImage = animatedImage {
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self.animatedImage = animatedImage
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} else {
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self.image = image
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}
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}
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}
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}
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case .failure:
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break
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}
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}
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}
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public func cancelTask() {
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activeAvatarRequestURL = nil
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avatarRequestCancellable?.cancel()
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}
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}
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