From 72dd1cf49478f58b428087734d2f5aafaf2ed4c1 Mon Sep 17 00:00:00 2001
From: zhongwuzw <zhongwuzw@qq.com>
Date: Fri, 15 Feb 2019 09:49:54 +0800
Subject: [PATCH 1/3] [iOS] Fix TextInput maxLength when insert characters at
 begin

---
 Libraries/Text/TextInput/RCTBaseTextInputView.m | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/Libraries/Text/TextInput/RCTBaseTextInputView.m b/Libraries/Text/TextInput/RCTBaseTextInputView.m
index 231680750dcd..3b6046af44b4 100644
--- a/Libraries/Text/TextInput/RCTBaseTextInputView.m
+++ b/Libraries/Text/TextInput/RCTBaseTextInputView.m
@@ -338,11 +338,7 @@ - (BOOL)textInputShouldChangeTextInRange:(NSRange)range replacementText:(NSStrin
 
   NSString *previousText = [_predictedText substringWithRange:range] ?: @"";
 
-  if (!_predictedText || backedTextInputView.attributedText.string.length == 0) {
-    _predictedText = text;
-  } else {
-    _predictedText = [_predictedText stringByReplacingCharactersInRange:range withString:text];
-  }
+  _predictedText = [backedTextInputView.attributedText.string stringByReplacingCharactersInRange:range withString:text];
 
   if (_onTextInput) {
     _onTextInput(@{

From e8d5c5f40d1f0abd7e362a7e6113e083a66b1efe Mon Sep 17 00:00:00 2001
From: zhongwuzw <zhongwuzw@qq.com>
Date: Thu, 7 Mar 2019 15:36:31 +0800
Subject: [PATCH 2/3] Clean up _predictedText and fix previousText

---
 Libraries/Text/TextInput/RCTBaseTextInputView.m | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/Libraries/Text/TextInput/RCTBaseTextInputView.m b/Libraries/Text/TextInput/RCTBaseTextInputView.m
index 3b6046af44b4..7e1fb6bb1b95 100644
--- a/Libraries/Text/TextInput/RCTBaseTextInputView.m
+++ b/Libraries/Text/TextInput/RCTBaseTextInputView.m
@@ -330,13 +330,7 @@ - (BOOL)textInputShouldChangeTextInRange:(NSRange)range replacementText:(NSStrin
     }
   }
 
-  if (range.location + range.length > _predictedText.length) {
-    // _predictedText got out of sync in a bad way, so let's just force sync it.  Haven't been able to repro this, but
-    // it's causing a real crash here: #6523822
-    _predictedText = backedTextInputView.attributedText.string;
-  }
-
-  NSString *previousText = [_predictedText substringWithRange:range] ?: @"";
+  NSString *previousText = backedTextInputView.attributedText.string ?: @"";
 
   _predictedText = [backedTextInputView.attributedText.string stringByReplacingCharactersInRange:range withString:text];
 
@@ -372,7 +366,6 @@ - (void)textInputDidChange
     [self textInputShouldChangeTextInRange:predictionRange replacementText:replacement];
     // JS will assume the selection changed based on the location of our shouldChangeTextInRange, so reset it.
     [self textInputDidChangeSelection];
-    _predictedText = backedTextInputView.attributedText.string;
   }
 
   _nativeEventCount++;

From afe7a9c5670705b017062768c7945df4071e7e29 Mon Sep 17 00:00:00 2001
From: zhongwuzw <zhongwuzw@qq.com>
Date: Fri, 8 Mar 2019 09:22:05 +0800
Subject: [PATCH 3/3] Fix tests

---
 Libraries/Text/TextInput/RCTBaseTextInputView.m | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Libraries/Text/TextInput/RCTBaseTextInputView.m b/Libraries/Text/TextInput/RCTBaseTextInputView.m
index 7e1fb6bb1b95..eb4127763366 100644
--- a/Libraries/Text/TextInput/RCTBaseTextInputView.m
+++ b/Libraries/Text/TextInput/RCTBaseTextInputView.m
@@ -331,8 +331,12 @@ - (BOOL)textInputShouldChangeTextInRange:(NSRange)range replacementText:(NSStrin
   }
 
   NSString *previousText = backedTextInputView.attributedText.string ?: @"";
-
-  _predictedText = [backedTextInputView.attributedText.string stringByReplacingCharactersInRange:range withString:text];
+  
+  if (range.location + range.length > backedTextInputView.attributedText.string.length) {
+    _predictedText = backedTextInputView.attributedText.string;
+  } else {
+    _predictedText = [backedTextInputView.attributedText.string stringByReplacingCharactersInRange:range withString:text];
+  }
 
   if (_onTextInput) {
     _onTextInput(@{