Opensourcing RCTWrapper

Summary:
RCTWrapper is a library that allows turn any UIView/UIViewController-based widget into React Native component
which will respect layout constrains of native (wrapped) view.
So, you don't need to explicitly specify width and hight in styling.

Take a look at examples to see how to use RCTWrapper.

Reviewed By: mmmulani

Differential Revision: D5868763

fbshipit-source-id: 0a503b42be166d547ca6cbf0829eea9c75a8e364

Libraries/Wrapper/RCTWrapperViewManager.m

@@ -0,0 +1,22 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+#import "RCTWrapperViewManager.h"
+
+#import "RCTWrapperShadowView.h"
+#import "RCTWrapperView.h"
+
+@implementation RCTWrapperViewManager
+
+RCT_EXPORT_MODULE()
+
+- (RCTShadowView *)shadowView
+{
+  return [[RCTWrapperShadowView alloc] initWithBridge:self.bridge];
+}
+
+- (UIView *)view
+{
+  return [[RCTWrapperView alloc] initWithBridge:self.bridge];
+}
+
+@end