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Add navigation to comments from the article
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| // | ||
| // DraggableCommentsButton.swift | ||
| // Hackers | ||
| // | ||
| // Created by Stanislav Rassolenko on 7/2/24. | ||
| // Copyright © 2024 Glass Umbrella. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
| import UIKit | ||
|
|
||
| class DraggableCommentsButton: UIButton { | ||
| private var post: Post | ||
| private var parentVc: UIViewController | ||
|
|
||
| private lazy var countLabel: UILabel = { | ||
| let label = UILabel() | ||
| label.font = .systemFont(ofSize: 11) | ||
| label.text = String(post.commentsCount) | ||
| label.textColor = .white | ||
| label.backgroundColor = .red | ||
| label.cornerRadius = 12.5 | ||
| label.textAlignment = .center | ||
| label.adjustsFontSizeToFitWidth = true | ||
| label.translatesAutoresizingMaskIntoConstraints = false | ||
| return label | ||
| }() | ||
|
|
||
| required init(for parent: UIViewController, and post: Post) { | ||
| self.parentVc = parent | ||
| self.post = post | ||
| super.init(frame: CGRect.zero) | ||
| commonInit() | ||
| } | ||
|
|
||
| required init?(coder: NSCoder) { | ||
| fatalError("init(coder:) has not been implemented") | ||
| } | ||
|
|
||
| private func commonInit() { | ||
| setupLayout() | ||
| setupForParent() | ||
| setupCountLabel() | ||
| } | ||
|
|
||
| private func setupLayout() { | ||
| layer.cornerRadius = 25 | ||
| backgroundColor = UIColor.lightGray.withAlphaComponent(0.6) | ||
| setImage(UIImage(systemName: "message"), for: .normal) | ||
| imageView?.contentMode = .scaleToFill | ||
| imageView?.tintColor = .white | ||
| isOpaque = true | ||
| translatesAutoresizingMaskIntoConstraints = false | ||
|
|
||
| addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(dragHandler))) | ||
| } | ||
|
|
||
| private func setupForParent() { | ||
| addTarget(self, action: #selector(buttonAction), for: .touchUpInside) | ||
| parentVc.view.addSubview(self) | ||
| constrainSelf() | ||
| parentVc.view.bringSubviewToFront(self) | ||
| layer.zPosition = parentVc.view.layer.zPosition + 1 | ||
| for subview in parentVc.view.subviews { | ||
| subview.isUserInteractionEnabled = false | ||
| } | ||
| isEnabled = true | ||
| isUserInteractionEnabled = true | ||
| } | ||
|
|
||
| private func setupCountLabel() { | ||
| addSubview(countLabel) | ||
| constrainCountLabel() | ||
| } | ||
|
|
||
| private func constrainCountLabel() { | ||
| countLabel.centerXAnchor.constraint(equalTo: trailingAnchor, constant: -5).isActive = true | ||
| countLabel.centerYAnchor.constraint(equalTo: bottomAnchor, constant: -5).isActive = true | ||
| countLabel.widthAnchor.constraint(equalToConstant: 25).isActive = true | ||
| countLabel.heightAnchor.constraint(equalToConstant: 25).isActive = true | ||
| } | ||
|
|
||
| private func constrainSelf() { | ||
| topAnchor.constraint(equalTo: parentVc.view.safeAreaLayoutGuide.topAnchor, constant: (66)).isActive = true | ||
| trailingAnchor.constraint(equalTo: parentVc.view.trailingAnchor, constant: -16).isActive = true | ||
| heightAnchor.constraint(equalToConstant: 50).isActive = true | ||
| widthAnchor.constraint(equalToConstant: 50).isActive = true | ||
| } | ||
|
|
||
| @objc private func buttonAction() { | ||
| let storyboard = UIStoryboard(name: "Main", bundle: nil) | ||
| let commentsVc = storyboard.instantiateViewController( | ||
| withIdentifier: "CommentsViewController" | ||
| ) as? CommentsViewController | ||
|
|
||
| if let cvc = commentsVc { | ||
| cvc.postId = post.id | ||
| cvc.showPost = false | ||
| cvc.post = post | ||
| let navigationController = UINavigationController(rootViewController: cvc) | ||
| self.parentVc.present(navigationController, animated: true, completion: nil) | ||
| } | ||
| } | ||
|
|
||
| @objc private func dragHandler(gesture: UIPanGestureRecognizer) { | ||
| let location = gesture.location(in: parentVc.view) | ||
| let draggedView = gesture.view | ||
| draggedView?.center = location | ||
|
|
||
| if gesture.state == .ended { | ||
| if self.frame.midX >= (self.parentVc.view.layer.frame.width) / 2 { | ||
| self.positionViewWithAnimation { | ||
| self.center.x = (self.parentVc.view.layer.frame.width) - 40 | ||
| } | ||
| } else { | ||
| self.positionViewWithAnimation { | ||
| self.center.x = 40 | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private func positionViewWithAnimation(animation: @escaping () -> Void) { | ||
| UIView.animate( | ||
| withDuration: 0.5, | ||
| delay: 0, | ||
| usingSpringWithDamping: 1, | ||
| initialSpringVelocity: 1, | ||
| options: .curveEaseIn, | ||
| animations: animation, | ||
| completion: nil | ||
| ) | ||
| } | ||
| } | ||
|
|
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