add hidden option to allow use safari view only to read cookies

README.md

@@ -92,22 +92,24 @@ class YourComponent extends Component {
 Displays a Safari View with the provided url.
 
 __Arguments__
-- `safariOptions` - An `Object` containing a `url` key and optionally a `readerMode` key, a `tintColor`, and/or a `barTintColor`.
+- `safariOptions` - An `Object` containing a `url` key and optionally a `readerMode` key, a `tintColor`, a `barTintColor`, and/or a `hidden`.
 
 __safariOptions__
 - `url` - A `String` containing the url you want to load in the Safari View
 - `readerMode` - A `Boolean` indicating to use Safari's Reader Mode if available
 - `tintColor` - A `String` containing a hex, rgba or rgba color to use for the browser controls
 - `barTintColor` - A `String` containing a hex, rgba or rgba color to use for the background of the browser controls (only available on iOS 10 and higher)
 - `fromBottom` - A 'Boolean' indicating to open the Safari View from the bottom
+- `hidden` - A 'Boolean' indicating if Safari View will appear or not. If true, it means the Safari View is only to read Safari's cookies
 
 __Examples__
 ```js
 SafariView.show({
   url: "http://facebook.github.io/react/blog/2015/03/26/introducing-react-native.html",
   readerMode: true // optional,
   tintColor: "#000" // optional
-  barTintColor: "#fff" // optional
+  barTintColor: "#fff" // optional,
+  hidden: true  // optional
 });
 ```
 

SafariViewManager.m

@@ -44,6 +44,7 @@ - (void)stopObserving
     UIColor *tintColorString = args[@"tintColor"];
     UIColor *barTintColorString = args[@"barTintColor"];
     BOOL fromBottom = [args[@"fromBottom"] boolValue];
+    BOOL hidden = [args[@"hidden"] boolValue];
 
     // Initialize the Safari View
     self.safariView = [[SFSafariViewController alloc] initWithURL:url entersReaderIfAvailable:readerMode];
@@ -75,8 +76,18 @@ - (void)stopObserving
     // get the view controller closest to the foreground
     UIViewController *ctrl = RCTPresentedViewController();
 
-    // Display the Safari View
-    [ctrl presentViewController:self.safariView animated:YES completion:nil];
+    if (hidden) {
+        // reference from https://github.com/EddyVerbruggen/cordova-plugin-safariviewcontroller
+        self.safariView.view.userInteractionEnabled = NO;
+        self.safariView.view.alpha = 0.05;
+        [ctrl addChildViewController:self.safariView];
+        [ctrl.view addSubview:self.safariView.view];
+        [self.safariView didMoveToParentViewController:ctrl];
+        self.safariView.view.frame = CGRectMake(0.0, 0.0, 0.5, 0.5);        
+    } else {
+        // Display the Safari View
+        [ctrl presentViewController:self.safariView animated:YES completion:nil];
+    }
 
     if (hasListeners) {
         [self sendEventWithName:@"SafariViewOnShow" body:nil];