From cb9f377a9051575884ca1018a1b33a9fd29de96b Mon Sep 17 00:00:00 2001
From: "pengfei.zhou" <pengfeizhou@foxmail.com>
Date: Fri, 8 May 2020 15:51:00 +0800
Subject: [PATCH] iOS:fix emoji cause substring error

---
 doric-iOS/Pod/Classes/Shader/DoricInputNode.m | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doric-iOS/Pod/Classes/Shader/DoricInputNode.m b/doric-iOS/Pod/Classes/Shader/DoricInputNode.m
index 7b02cb13..75954e76 100644
--- a/doric-iOS/Pod/Classes/Shader/DoricInputNode.m
+++ b/doric-iOS/Pod/Classes/Shader/DoricInputNode.m
@@ -199,7 +199,8 @@ - (BOOL)textViewShouldEndEditing:(UITextView *)textView {
 - (void)textViewDidChange:(UITextView *)textView {
     if (self.maxLength) {
         if (textView.text.length > self.maxLength.unsignedIntValue) {
-            textView.text = [textView.text substringToIndex:self.maxLength.unsignedIntValue];
+            NSRange range = [textView.text rangeOfComposedCharacterSequencesForRange:NSMakeRange(0, self.maxLength.unsignedIntValue)];
+            textView.text = [textView.text substringWithRange:range];
         }
     }
     if (self.onTextChange) {