Fixed <TextInput> bug with autocapitalization

Reviewed By: shergin

Differential Revision: D7304936

fbshipit-source-id: ef587db89b64e7111dfdeb049c3a1a334c15430b

Author: Peter Argany

Libraries/Text/TextInput/RCTBaseTextInputView.m

@@ -102,7 +102,17 @@ - (void)setAttributedText:(NSAttributedString *)attributedText
 {
   NSInteger eventLag = _nativeEventCount - _mostRecentEventCount;
 
-  if (eventLag == 0 && ![attributedText isEqualToAttributedString:self.backedTextInputView.attributedText]) {
+  // Remove tag attribute to ensure correct attributed string comparison.
+  NSMutableAttributedString *const backedTextInputViewTextCopy = [self.backedTextInputView.attributedText mutableCopy];
+  NSMutableAttributedString *const attributedTextCopy = [attributedText mutableCopy];
+
+  [backedTextInputViewTextCopy removeAttribute:RCTTextAttributesTagAttributeName
+                                         range:NSMakeRange(0, backedTextInputViewTextCopy.length)];
+
+  [attributedTextCopy removeAttribute:RCTTextAttributesTagAttributeName
+                                range:NSMakeRange(0, attributedTextCopy.length)];
+
+  if (eventLag == 0 && ![attributedTextCopy isEqualToAttributedString:backedTextInputViewTextCopy]) {
     UITextRange *selection = self.backedTextInputView.selectedTextRange;
     NSInteger oldTextLength = self.backedTextInputView.attributedText.string.length;