Animation happens in @objc private func addToFavoritesTapped (Line 44), function animateButtonView(sender) (Line 64) is called (on line 45) that takes alpha to 0, then changes an image, and takes alpha back to 1.
import UIKit
// MARK: - Protocols and Delegates
protocol SearchTweetsCellDelegates: class {
func didRequestSafari(with urlString: String?)
}
final class SearchTweetsCell: UICollectionViewCell {
// MARK: - Declarations
static let reuseId = "cell"
let addToFavoritesButton = UIButton()
var timeDateLabel = UILabel()
let tweetBodyLabel = UserSearchVCTextView()
var mediaStackView = UIStackView()
let seeOnlineButton = UIButton()
var sharesView = CellMediaInfoView()
var likesView = CellMediaInfoView()
var goSafariButton = GoSafariButton()
weak var delegateSafari: SearchTweetsCellDelegates!
var tweet: Tweet!
var user: User!
var urlString: String?
// MARK: - Initialise & Override
override init(frame: CGRect) {
super.init(frame: frame)
configureCell()
configureUIElements()
layoutUI()
configureMediaStackView()
configureGoSafariButton()
}
override func prepareForReuse() { self.goSafariButton.isHidden = false }
required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }
// MARK: - @Objectives
@objc private func addToFavoritesTapped(sender: UIView) {
animateButtonView(sender)
let favorite = fromTweetToFavoriteTweet(user: user, tweet: tweet)
PersistenceManager.updateWithTweets(favoriteTweet: favorite, persistenceAction: .add) { [weak self] (error) in
guard self != nil else { return }
guard let error = error else {
print("sucess")
return
}
print(error.rawValue)
}
self.addToFavoritesButton.isEnabled = false
}
@objc private func didTapGoSafariButton(_ sender: UIView) {
delegateSafari.didRequestSafari(with: urlString)
}
// MARK: - Animations
private func animateButtonView(_ viewToAnimate: UIView) {
UIView.animate(withDuration: 0.2, animations: {viewToAnimate.alpha = 0}) { [weak self] (true) in
guard let self = self else { return }
switch true {
case true:
DispatchQueue.main.async { self.addToFavoritesButton.setImage(SFSymbolsAsImg.checkmark, for: .normal) }
UIView.animate(withDuration: 0.2, animations: {viewToAnimate.alpha = 1} )
case false:
return
}
}
}
// MARK: - Called outside
func set(with usersTweet: Tweet, user: User) {
self.user = user
tweet = usersTweet
urlString = usersTweet.urlToExpandWithSafari
tweetBodyLabel.text = usersTweet.tweetText
timeDateLabel.text = usersTweet.createdAt.formatToTwitterPostDate()
sharesView.set(itemInfoType: .shares, with: usersTweet.retweetCounter.convertToKMFormatStr())
likesView.set(itemInfoType: .likes, with: usersTweet.likesCounter.convertToKMFormatStr())
if tweet.urlToExpandWithSafari == nil { goSafariButton.isEnabled = true }
self.goSafariButton.setTitle(TweetStrings.seeFull, for: .normal)
}
// MARK: - Cell Configuration
private func fromTweetToFavoriteTweet(user: User ,tweet: Tweet) - FavoriteTweet {
let favoriteTweet = FavoriteTweet(twitsId: tweet.twitsId,
name: user.name,
tweetText: tweet.tweetText,
profileImageUrl: user.profileImageUrl,
urlToExpandWithSafari: tweet.urlToExpandWithSafari,
likesCounter: tweet.likesCounter,
retweetCounter: tweet.retweetCounter,
createdAt: tweet.createdAt)
return favoriteTweet
}
private func configureCell() {
backgroundColor = .secondarySystemBackground
layer.cornerRadius = 15
}
private func configureGoSafariButton() {
goSafariButton.addTarget(self, action: #selector(didTapGoSafariButton), for: .touchUpInside)
}
private func configureMediaStackView() {
mediaStackView.axis = .horizontal
mediaStackView.distribution = .equalSpacing
mediaStackView.alignment = .center
mediaStackView.addArrangedSubview(sharesView)
mediaStackView.addArrangedSubview(likesView)
}
private func configureUIElements() {
timeDateLabel.textColor = .systemGray
timeDateLabel.textAlignment = .center
addToFavoritesButton.setImage(SFSymbolsAsImg.plus, for: .normal)
addToFavoritesButton.tintColor = ColorsTwitter.twitterBlue
addToFavoritesButton.addTarget(self, action: #selector(addToFavoritesTapped), for: .touchUpInside)
}
// MARK: - Layout Configuration
private func layoutUI() {
addSubviews(addToFavoritesButton, timeDateLabel, tweetBodyLabel, mediaStackView, goSafariButton)
tamicToFalse(addToFavoritesButton, mediaStackView, timeDateLabel)
let mediaLeadingPadding: CGFloat = DeviceTypes.isiPhoneSE || DeviceTypes.isiPhone8Zoomed ? 10 : 30
let mediaWidthMltp: CGFloat = DeviceTypes.isiPhoneSE || DeviceTypes.isiPhone8Zoomed ? 0.55 : 0.5
NSLayoutConstraint.activate([ ... ]) // Removed from the post for less text
}
}
