Changed RCTTextView to check for failed focus

Reviewed By: nicklockwood

Differential Revision: D3378236

fbshipit-source-id: b4a33f7808ffe116b51631cde35f5cd0042caee9

Libraries/Text/RCTTextView.m

@@ -48,6 +48,14 @@
   _jsRequestingFirstResponder = NO;
 }
 
+- (void)didMoveToWindow
+{
+  if (_jsRequestingFirstResponder) {
+    [self becomeFirstResponder];
+    [self reactDidMakeFirstResponder];
+  }
+}
+
 @end
 
 @implementation RCTTextView

React/Modules/RCTUIManager.m

@@ -1032,8 +1032,9 @@ RCT_EXPORT_METHOD(focus:(nonnull NSNumber *)reactTag)
   [self addUIBlock:^(__unused RCTUIManager *uiManager, NSDictionary<NSNumber *, UIView *> *viewRegistry) {
     UIView *newResponder = viewRegistry[reactTag];
     [newResponder reactWillMakeFirstResponder];
-    [newResponder becomeFirstResponder];
-    [newResponder reactDidMakeFirstResponder];
+    if ([newResponder becomeFirstResponder]) {
+      [newResponder reactDidMakeFirstResponder];
+    }
   }];
 }