Adds 'fromBottom' option for modalPresentationStyle.

SafariViewManager.m

@@ -17,6 +17,7 @@ RCT_EXPORT_MODULE()
 RCT_EXPORT_METHOD(show:(NSDictionary *)args callback:(RCTResponseSenderBlock)callback)
 {
     UIColor *tintColorString = args[@"tintColor"];
+    BOOL fromBottom = [args[@"fromBottom"] boolValue];
 
     // Error if no url is passed
     if (!args[@"url"]) {
@@ -34,6 +35,11 @@ RCT_EXPORT_METHOD(show:(NSDictionary *)args callback:(RCTResponseSenderBlock)cal
         [self.safariView.view setTintColor:tintColor];
     }
 
+    // Set modal transition style
+    if(fromBottom) {
+        self.safariView.modalPresentationStyle = UIModalPresentationOverFullScreen;
+    }
+
     // Display the Safari View
     UIViewController *ctrl = [[[[UIApplication sharedApplication] delegate] window] rootViewController];
     [ctrl presentViewController:self.safariView animated:YES completion:nil];

examples/SafariViewExample/index.ios.js

@@ -65,7 +65,8 @@ class SafariViewExample extends Component {
     SafariView.show({
       url: 'http://twitter.com/naoufal',
       readerMode: true,
-      tintColor: "rgb(0, 0, 0)"
+      tintColor: "rgb(0, 0, 0)",
+      fromBottom: true
     });
   }