From e612d7cb096f505cc00f2dbea40b19d76e28ef9d Mon Sep 17 00:00:00 2001
From: hamaron <takashi@junify.com>
Date: Fri, 30 Mar 2018 17:39:09 +0900
Subject: [PATCH] iOS: Fixed the bug where a Backspace event was emitted after
 clearing a text in TextInput by an empty string

---
 Libraries/Text/TextInput/RCTBaseTextInputView.m | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Libraries/Text/TextInput/RCTBaseTextInputView.m b/Libraries/Text/TextInput/RCTBaseTextInputView.m
index cbfa24d1ab4f8d..d3ad1cf633c421 100644
--- a/Libraries/Text/TextInput/RCTBaseTextInputView.m
+++ b/Libraries/Text/TextInput/RCTBaseTextInputView.m
@@ -289,7 +289,12 @@ - (BOOL)textInputShouldChangeTextInRange:(NSRange)range replacementText:(NSStrin
 
   NSString *previousText = [_predictedText substringWithRange:range] ?: @"";
 
-  if (_predictedText) {
+  // After clearing the text by replacing it with an empty string, `_predictedText`
+  // still preserves the deleted text.
+  // As the first character in the TextInput always comes with the range value (0, 0),
+  // we should check the range value in order to avoid appending a character to the deleted string
+  // (which caused the issue #18374)
+  if (!NSEqualRanges(range, NSMakeRange(0, 0)) && _predictedText) {
     _predictedText = [_predictedText stringByReplacingCharactersInRange:range withString:text];
   } else {
     _predictedText = text;