From 860b537b3e8b92e44b4010ba52a45f1d7213ef89 Mon Sep 17 00:00:00 2001
From: Arnold <40414978+PatriceJiang@users.noreply.github.com>
Date: Fri, 6 Sep 2019 18:51:12 +0800
Subject: [PATCH] update readme (#20109)

---
 cmake/README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cmake/README.md b/cmake/README.md
index 8bf6e8c2d8..cde5531941 100644
--- a/cmake/README.md
+++ b/cmake/README.md
@@ -56,11 +56,11 @@ open Cocos2d-x.xcodeproj
 ```sh
 cd cocos2d-x
 mkdir ios-build && cd ios-build
-cmake .. -GXcode -DCMAKE_TOOLCHAIN_FILE=../cmake/ios.toolchain.cmake
+cmake .. -GXcode -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=iphoneos
 open Cocos2d-x.xcodeproj
 ```
 
-The default build is for running on iOS device, if you want to run in the simulator, please add `-DIOS_PLATFORM=SIMULATOR` for architecture i386 or `-DIOS_PLATFORM=SIMULATOR64` for x86_64, but remember you can't run metal-support app in simulator because Apple limitation.
+The parameter `-DCMAKE_OSX_SYSROOT=iphoneos` is optional, it generates a build for running on the iOS device. If you want to run in the simulator, please add `-DCMAKE_OSX_SYSROOT=iphonesimulator`, but remember you can't run a metal-support app in the simulator until Xcode 11.
 
 if you want to sign iOS app in CMake, you will need to fill development team ID into `set_xcode_property(${APP_NAME} DEVELOPMENT_TEAM "")`, or select to sign in Xcode after project files generated.