feat(epub): complete wxread parity scope

Sources/RDReaderView/EPUBUI/RDEPUBReaderSettingsViewController.swift

@@ -14,6 +14,8 @@ final class RDEPUBReaderSettingsViewController: UIViewController {
     var onFontSizeChange: ((CGFloat) -> Void)?
     /// 行距倍数变化回调
     var onLineHeightChange: ((CGFloat) -> Void)?
+    /// 栏数变化回调
+    var onColumnCountChange: ((Int) -> Void)?
     /// 翻页模式变化回调
     var onDisplayTypeChange: ((RDReaderView.DisplayType) -> Void)?
     /// 主题变化回调
@@ -65,6 +67,7 @@ final class RDEPUBReaderSettingsViewController: UIViewController {
     private let decreaseFontButton = UIButton(type: .system)
     private let increaseFontButton = UIButton(type: .system)
     private let lineHeightControl = UISegmentedControl(items: ["紧凑", "标准", "宽松"])
+    private let columnCountControl = UISegmentedControl(items: ["单栏", "双栏"])
     private let displayTypeControl = UISegmentedControl(items: ["仿真", "横滑", "竖滑"])
     private let themeStackView: UIStackView = {
         let stackView = UIStackView()
@@ -136,6 +139,7 @@ final class RDEPUBReaderSettingsViewController: UIViewController {
         increaseFontButton.addTarget(self, action: #selector(increaseFontAction), for: .touchUpInside)
 
         lineHeightControl.addTarget(self, action: #selector(lineHeightChanged(_:)), for: .valueChanged)
+        columnCountControl.addTarget(self, action: #selector(columnCountChanged(_:)), for: .valueChanged)
         displayTypeControl.addTarget(self, action: #selector(displayTypeChanged(_:)), for: .valueChanged)
 
         ThemePreset.allCases.forEach { preset in
@@ -156,6 +160,7 @@ final class RDEPUBReaderSettingsViewController: UIViewController {
         contentStack.addArrangedSubview(makeSection(title: "亮度", content: brightnessSlider))
         contentStack.addArrangedSubview(makeSection(title: "字号", content: makeFontSizeRow()))
         contentStack.addArrangedSubview(makeSection(title: "行距", content: lineHeightControl))
+        contentStack.addArrangedSubview(makeSection(title: "分栏", content: columnCountControl))
         contentStack.addArrangedSubview(makeSection(title: "翻页方式", content: displayTypeControl))
         contentStack.addArrangedSubview(makeSection(title: "主题", content: themeStackView))
     }
@@ -203,6 +208,7 @@ final class RDEPUBReaderSettingsViewController: UIViewController {
 
         let lineHeightIndex = lineHeightValues.enumerated().min { abs($0.element - currentConfiguration.lineHeightMultiple) < abs($1.element - currentConfiguration.lineHeightMultiple) }?.offset ?? 1
         lineHeightControl.selectedSegmentIndex = lineHeightIndex
+        columnCountControl.selectedSegmentIndex = currentConfiguration.numberOfColumns > 1 ? 1 : 0
 
         switch currentConfiguration.displayType {
         case .pageCurl:
@@ -233,7 +239,7 @@ final class RDEPUBReaderSettingsViewController: UIViewController {
             button.backgroundColor = theme.toolBackgroundColor
         }
 
-        [lineHeightControl, displayTypeControl].forEach { control in
+        [lineHeightControl, columnCountControl, displayTypeControl].forEach { control in
             control.backgroundColor = theme.toolBackgroundColor
             if #available(iOS 13.0, *) {
                 control.selectedSegmentTintColor = theme.toolControlTextColor.withAlphaComponent(0.14)
@@ -289,6 +295,12 @@ final class RDEPUBReaderSettingsViewController: UIViewController {
         onLineHeightChange?(value)
     }
 
+    @objc private func columnCountChanged(_ control: UISegmentedControl) {
+        let numberOfColumns = control.selectedSegmentIndex == 1 ? 2 : 1
+        currentConfiguration.numberOfColumns = numberOfColumns
+        onColumnCountChange?(numberOfColumns)
+    }
+
     @objc private func displayTypeChanged(_ control: UISegmentedControl) {
         let displayType: RDReaderView.DisplayType
         switch control.selectedSegmentIndex {
@@ -309,4 +321,4 @@ final class RDEPUBReaderSettingsViewController: UIViewController {
         applyTheme(preset.theme)
         onThemeChange?(preset.theme)
     }
-}
+}