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| 1 | +// |
| 2 | +// DownloadButton.swift |
| 3 | +// FXViewKit |
| 4 | +// |
| 5 | +// Created by aria on 2023/2/19. |
| 6 | +// |
| 7 | + |
| 8 | +import Foundation |
| 9 | + |
| 10 | +public class DownloadButton: UIButton { |
| 11 | + |
| 12 | + public enum DownloadButtonState { |
| 13 | + case pending |
| 14 | + case downloading |
| 15 | + case downloaded |
| 16 | + } |
| 17 | + |
| 18 | + public var downloadState: DownloadButtonState = .pending { |
| 19 | + didSet { |
| 20 | + updateState() |
| 21 | + } |
| 22 | + } |
| 23 | + |
| 24 | + public let startButton = UIButton() |
| 25 | + public let indicator = UIActivityIndicatorView() |
| 26 | + public let downloadedButton = UIButton() |
| 27 | + |
| 28 | + public override init(frame: CGRect) { |
| 29 | + super.init(frame: frame) |
| 30 | + |
| 31 | + startButton.isUserInteractionEnabled = false |
| 32 | + indicator.isUserInteractionEnabled = false |
| 33 | + downloadedButton.isUserInteractionEnabled = false |
| 34 | + |
| 35 | + addSubview(startButton) |
| 36 | + addSubview(indicator) |
| 37 | + addSubview(downloadedButton) |
| 38 | + |
| 39 | + updateState() |
| 40 | + } |
| 41 | + |
| 42 | + required init?(coder: NSCoder) { |
| 43 | + fatalError("init(coder:) has not been implemented") |
| 44 | + } |
| 45 | + |
| 46 | + public override func layoutSubviews() { |
| 47 | + super.layoutSubviews() |
| 48 | + startButton.frame = bounds |
| 49 | + indicator.frame = bounds |
| 50 | + downloadedButton.frame = bounds |
| 51 | + } |
| 52 | + |
| 53 | + private func updateState() { |
| 54 | + isEnabled = downloadState != .downloading |
| 55 | + startButton.isHidden = downloadState != .pending |
| 56 | + indicator.isHidden = downloadState != .downloading |
| 57 | + |
| 58 | + if downloadState != .downloading { |
| 59 | + indicator.stopAnimating() |
| 60 | + } else { |
| 61 | + indicator.startAnimating() |
| 62 | + } |
| 63 | + |
| 64 | + downloadedButton.isHidden = downloadState != .downloaded |
| 65 | + } |
| 66 | + |
| 67 | +} |
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