120 lines
4.6 KiB
Swift
120 lines
4.6 KiB
Swift
import UIKit
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// MARK: - 顶部工具栏
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/// 阅读器顶部工具栏
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/// 显示书名、返回按钮和书签按钮
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/// 位于阅读内容上方，支持 iOS 13+ SF Symbols 和低版本文字回退
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public final class RDEPUBReaderTopToolView: RDEPUBReaderToolView {
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/// 返回按钮点击回调
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var onBack: (() -> Void)?
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/// 书签按钮点击回调
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var onToggleBookmark: (() -> Void)?
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private let backButton = RDEPUBReaderTintButton(type: .system)
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private let bookmarkButton = RDEPUBReaderTintButton(type: .system)
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private let titleLabel: UILabel = {
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let label = UILabel()
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label.textAlignment = .center
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label.font = UIFont.systemFont(ofSize: 16, weight: .semibold)
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label.numberOfLines = 1
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return label
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}()
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private var isBookmarked = false
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override init(frame: CGRect) {
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super.init(frame: frame)
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self.backgroundColor = .white
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addSubview(backButton)
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addSubview(bookmarkButton)
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addSubview(titleLabel)
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backButton.translatesAutoresizingMaskIntoConstraints = false
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bookmarkButton.translatesAutoresizingMaskIntoConstraints = false
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titleLabel.translatesAutoresizingMaskIntoConstraints = false
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backButton.addTarget(self, action: #selector(backAction), for: .touchUpInside)
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bookmarkButton.addTarget(self, action: #selector(bookmarkAction), for: .touchUpInside)
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NSLayoutConstraint.activate([
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backButton.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 8),
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backButton.topAnchor.constraint(equalTo: safeAreaLayoutGuide.topAnchor, constant: 4),
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backButton.bottomAnchor.constraint(equalTo: bottomAnchor, constant: -4),
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backButton.widthAnchor.constraint(equalToConstant: 44),
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backButton.heightAnchor.constraint(equalToConstant: 44),
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bookmarkButton.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -8),
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bookmarkButton.topAnchor.constraint(equalTo: safeAreaLayoutGuide.topAnchor, constant: 4),
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bookmarkButton.bottomAnchor.constraint(equalTo: bottomAnchor, constant: -4),
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bookmarkButton.widthAnchor.constraint(equalToConstant: 44),
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bookmarkButton.heightAnchor.constraint(equalToConstant: 44),
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titleLabel.leadingAnchor.constraint(equalTo: backButton.trailingAnchor, constant: 8),
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titleLabel.trailingAnchor.constraint(equalTo: bookmarkButton.leadingAnchor, constant: -8),
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titleLabel.centerYAnchor.constraint(equalTo: backButton.centerYAnchor)
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])
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if #available(iOS 13.0, *) {
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backButton.setImage(UIImage(systemName: "chevron.left")?.withRenderingMode(.alwaysTemplate), for: .normal)
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} else {
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backButton.setTitle("返回", for: .normal)
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}
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backButton.accessibilityIdentifier = "epub.reader.back"
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bookmarkButton.accessibilityIdentifier = "epub.reader.bookmark"
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titleLabel.accessibilityIdentifier = "epub.reader.title"
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updateBookmarkButtonAppearance()
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override public func lineFrame(in bounds: CGRect) -> CGRect {
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CGRect(x: 0, y: bounds.height - 0.5, width: bounds.width, height: 0.5)
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}
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override public func apply(theme: RDEPUBReaderTheme) {
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super.apply(theme: theme)
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titleLabel.textColor = .black
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backButton.tintColor = .black
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bookmarkButton.tintColor = .black
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if #unavailable(iOS 13.0) {
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backButton.setTitleColor(.black, for: .normal)
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bookmarkButton.setTitleColor(.black, for: .normal)
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}
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updateBookmarkButtonAppearance()
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}
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func setTitle(_ title: String?) {
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titleLabel.text = title
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}
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func setBookmarkSelected(_ isSelected: Bool) {
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isBookmarked = isSelected
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updateBookmarkButtonAppearance()
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}
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func setBookmarkEnabled(_ isEnabled: Bool) {
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bookmarkButton.isEnabled = isEnabled
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bookmarkButton.alpha = isEnabled ? 1 : 0.45
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}
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@objc private func backAction() {
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print("[Debug] backAction fired, onBack: \(String(describing: onBack))")
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onBack?()
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}
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@objc private func bookmarkAction() {
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onToggleBookmark?()
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}
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private func updateBookmarkButtonAppearance() {
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if #available(iOS 13.0, *) {
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let imageName = isBookmarked ? "bookmark.fill" : "bookmark"
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bookmarkButton.setImage(UIImage(systemName: imageName)?.withRenderingMode(.alwaysTemplate), for: .normal)
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} else {
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bookmarkButton.setTitle(isBookmarked ? "已签" : "书签", for: .normal)
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}
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}
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}
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