From 3c312fda77f4b39ecfdce9dba31ebcc358dfa47a Mon Sep 17 00:00:00 2001
From: Wu Zhong <zhongwuzw@qq.com>
Date: Fri, 5 Nov 2021 15:18:01 +0800
Subject: [PATCH] [iOS] Fixes press key message leaks (flutter/engine#29354)

---
 .../darwin/ios/framework/Source/FlutterChannelKeyResponder.mm | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterChannelKeyResponder.mm b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterChannelKeyResponder.mm
index e1579024a7..4e9131711b 100644
--- a/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterChannelKeyResponder.mm
+++ b/engine/src/flutter/shell/platform/darwin/ios/framework/Source/FlutterChannelKeyResponder.mm
@@ -132,7 +132,7 @@ static NSString* getEventCharacters(NSString* characters, UIKeyboardHIDUsage key
   NSString* characters = getEventCharacters(press.key.characters, press.key.keyCode);
   NSString* charactersIgnoringModifiers =
       getEventCharacters(press.key.charactersIgnoringModifiers, press.key.keyCode);
-  NSMutableDictionary* keyMessage = [@{
+  NSMutableDictionary* keyMessage = [[@{
     @"keymap" : @"ios",
     @"type" : type,
     @"keyCode" : @(press.key.keyCode),
@@ -141,7 +141,7 @@ static NSString* getEventCharacters(NSString* characters, UIKeyboardHIDUsage key
     @"charactersIgnoringModifiers" : charactersIgnoringModifiers == nil
         ? @""
         : charactersIgnoringModifiers,
-  } mutableCopy];
+  } mutableCopy] autorelease];
   [self.channel sendMessage:keyMessage
                       reply:^(id reply) {
                         bool handled = reply ? [[reply valueForKey:@"handled"] boolValue] : true;