Merge pull request #62 from pegurov/master

Added support for table section index

Author: maxsokolov

Sources/TableDirector.swift

@@ -31,7 +31,8 @@ open class TableDirector: NSObject, UITableViewDataSource, UITableViewDelegate {
     private weak var scrollDelegate: UIScrollViewDelegate?
     private var cellRegisterer: TableCellRegisterer?
     public private(set) var rowHeightCalculator: RowHeightCalculator?
-
+    private var sectionsIndexTitlesIndexes: [Int]?
+    
     @available(*, deprecated, message: "Produced incorrect behaviour")
     open var shouldUsePrototypeCellHeightCalculation: Bool = false {
         didSet {
@@ -192,6 +193,32 @@ open class TableDirector: NSObject, UITableViewDataSource, UITableViewDelegate {
         return section.footerHeight ?? section.footerView?.frame.size.height ?? UITableViewAutomaticDimension
     }
 
+    // MARK: UITableViewDataSource - Index
+    
+    public func sectionIndexTitles(for tableView: UITableView) -> [String]? {
+        
+        var indexTitles = [String]()
+        var indexTitlesIndexes = [Int]()
+        sections.enumerated().forEach { index, section in
+            
+            if let title = section.indexTitle {
+                indexTitles.append(title)
+                indexTitlesIndexes.append(index)
+            }
+        }
+        if !indexTitles.isEmpty {
+            
+            sectionsIndexTitlesIndexes = indexTitlesIndexes
+            return indexTitles
+        }
+        sectionsIndexTitlesIndexes = nil
+        return nil
+    }
+    
+    public func tableView(_ tableView: UITableView, sectionForSectionIndexTitle title: String, at index: Int) -> Int {
+        return sectionsIndexTitlesIndexes?[index] ?? 0
+    }
+    
     // MARK: UITableViewDelegate - actions
 
     open func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

Sources/TableSection.swift

@@ -26,6 +26,7 @@ open class TableSection {
 
     open var headerTitle: String?
     open var footerTitle: String?
+    open var indexTitle: String?
 
     open var headerView: UIView?
     open var footerView: UIView?

TableKit.podspec

@@ -2,7 +2,7 @@ Pod::Spec.new do |s|
     s.name                  = 'TableKit'
     s.module_name           = 'TableKit'
 
-    s.version               = '2.3.1'
+    s.version               = '2.4.0'
 
     s.homepage              = 'https://github.com/maxsokolov/TableKit'
     s.summary               = 'Type-safe declarative table views with Swift.'
@@ -14,4 +14,4 @@ Pod::Spec.new do |s|
 
     s.source_files          = 'Sources/*.swift'
     s.source                = { :git => 'https://github.com/maxsokolov/TableKit.git', :tag => s.version }
-end
+end