Fixed issues with selectedSegmentIndex not been respected when set in viewDidLoad.

Author: GocePetrovski

Demo/ScrollableSegmentedControlDemo/ScrollableSegmentedControlDemo/TableViewController.swift

@@ -28,6 +28,7 @@ class TableViewController: UITableViewController {
         segmentedControl.insertSegment(withTitle: "Segment 6", image: #imageLiteral(resourceName: "segment-6"), at: 5)
 
         segmentedControl.underlineSelected = true
+        segmentedControl.selectedSegmentIndex = 0
 
         segmentedControl.addTarget(self, action: #selector(TableViewController.segmentSelected(sender:)), for: .valueChanged)
     }

ScrollableSegmentedControl/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
+	<string>1.0.1</string>
 	<key>CFBundleVersion</key>
 	<string>$(CURRENT_PROJECT_VERSION)</string>
 	<key>NSPrincipalClass</key>

ScrollableSegmentedControl/ScrollableSegmentedControl.swift

@@ -350,8 +350,8 @@ public class ScrollableSegmentedControl: UIControl {
                         underlineView?.removeFromSuperview()
                     } else {
                         underlineView = UIView()
-                        underlineView?.backgroundColor = tintColor
-                        underlineView?.isHidden = true
+                        underlineView!.backgroundColor = tintColor
+                        underlineView!.isHidden = !isSelected
                         contentView.insertSubview(underlineView!, at: contentView.subviews.count)
                     }