when selecting a cell in tableview : set background color to blue

xdrip/Constants/ConstantsUI.swift

@@ -6,4 +6,7 @@ enum ConstantsUI {
     /// color for section titles in grouped table views, example in settings view
     static let tableViewHeaderTextColor = UIColor.systemBlue
     
+    /// color to use as background when a row is selected
+    static let tableRowSelectedBackGroundColor = UIColor.systemBlue
+    
 }

xdrip/View Controllers/Helpers/SettingsTableViewCell/SettingsTableViewCell.swift

@@ -6,4 +6,35 @@ class SettingsTableViewCell: UITableViewCell {
     
     static let reuseIdentifier = "SettingsCell"
     
+    /// single instance of a view with backgroundColor = custom color
+    private static var selectedBackGroundView: UIView = {
+     
+            let backgroundView = UIView()
+            
+            backgroundView.backgroundColor = ConstantsUI.tableRowSelectedBackGroundColor
+            
+            return backgroundView
+
+    }()
+    
+    override
+    init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
+
+        super.init(style: style, reuseIdentifier: reuseIdentifier)
+
+        // will set color when selected to own color
+        selectedBackgroundView = SettingsTableViewCell.selectedBackGroundView
+
+    }
+    
+    required
+    init?(coder: NSCoder) {
+        
+        super.init(coder: coder)
+
+        // will set color when selected to own color
+        selectedBackgroundView = SettingsTableViewCell.selectedBackGroundView
+
+    }
+    
 }