A self.self slipped into the code.

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "SVWebViewController/vendors/OpenInChromeController"]
+	path = SVWebViewController/vendors/OpenInChromeController
+url=https://github.com/adonoho/OpenInChrome.git

SVWebViewController/SVModalWebViewController.h

@@ -6,15 +6,14 @@
 //
 //  https://github.com/samvermette/SVWebViewController
 
-#import <UIKit/UIKit.h>
+@import UIKit;
 
-@class SVWebViewController;
-
-@interface SVModalWebViewController : UINavigationController
+@interface SVModalWebViewController : UINavigationController <UIToolbarDelegate>
 
 - (id)initWithAddress:(NSString*)urlString;
 - (id)initWithURL:(NSURL *)URL;
 
-@property (nonatomic, strong) UIColor *barsTintColor;
+@property (nonatomic) UIColor *barTintColor;
+@property (getter = isBarAttached, nonatomic) BOOL barAttached;
 
 @end

SVWebViewController/SVModalWebViewController.m

@@ -30,7 +30,7 @@ - (id)initWithURL:(NSURL *)URL {
     if (self = [super initWithRootViewController:self.webViewController]) {
         UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone
                                                                                     target:self.webViewController
-                                                                                    action:@selector(doneButtonClicked:)];
+                                                                                    action:kDoneButtonClicked];
 
         if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
             self.webViewController.navigationItem.leftBarButtonItem = doneButton;
@@ -40,11 +40,28 @@ - (id)initWithURL:(NSURL *)URL {
     return self;
 }
 
-- (void)viewWillAppear:(BOOL)animated {
+- (void) viewWillAppear: (BOOL) animated {
+
     [super viewWillAppear:NO];
 
     self.webViewController.title = self.title;
-    self.navigationBar.tintColor = self.barsTintColor;
-}
+
+    if (self.barTintColor) {
+
+        self.navigationBar.barTintColor = self.barTintColor;
+    }
+
+} // -viewWillAppear:
+
+
+#pragma mark - UIToolbarDelegate methods.
+
+
+- (UIBarPosition) positionForBar: (id<UIBarPositioning>) bar {
+
+    return self.isBarAttached ? UIBarPositionTopAttached : UIBarPositionTop;
+
+} // -positionForBar:
+
 
 @end

SVWebViewController/SVWebViewController.h

@@ -6,11 +6,33 @@
 //
 //  https://github.com/samvermette/SVWebViewController
 
-#import "SVModalWebViewController.h"
+@import UIKit;
+
+@protocol SVWebViewControllerDelegate;
+@protocol SVWebViewPresenter <UIWebViewDelegate, SVWebViewControllerDelegate>
+@end
 
 @interface SVWebViewController : UIViewController
 
+@property (nonatomic) UIWebView *webView;
+@property (weak, nonatomic) id<SVWebViewPresenter> delegate;
+
 - (id)initWithAddress:(NSString*)urlString;
 - (id)initWithURL:(NSURL*)URL;
 
+#define kDoneButtonClicked  (@selector(doneButtonClicked:))
+- (void) doneButtonClicked: (id) sender;
+
+@end
+
+@protocol SVWebViewControllerDelegate <NSObject>
+
+@optional
+
+- (void) webViewControllerWillAppear: (SVWebViewController *) wvc;
+- (void) webViewControllerDidAppear:  (SVWebViewController *) wvc;
+
+- (void) webViewControllerWillDisappear: (SVWebViewController *) wvc;
+- (void) webViewControllerDidDisappear:  (SVWebViewController *) wvc;
+
 @end