[v4] remove ios cmake.toolchain.file

update cmake generator parameters for iOS

Author: patricejiang

plugins/plugin_compile/project_compile.py

@@ -888,9 +888,8 @@ def build(self, platform):
             # iOS need to generate Xcode project file first
             if platform == 'ios':
                 engine_dir = self.get_engine_dir()
-                ios_cmake_toolchain_file = os.path.join(engine_dir, 'cmake/ios.toolchain.cmake')
-                self._run_cmd('cmake %s -GXcode -DCMAKE_TOOLCHAIN_FILE=%s' % 
-                              ( os.path.relpath(cmakefile_dir, build_dir), ios_cmake_toolchain_file) )
+                self._run_cmd('cmake %s -GXcode -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_SYSROOT=iphoneos' % 
+                              ( os.path.relpath(cmakefile_dir, build_dir) ) )
             elif platform == 'mac':
                 self._run_cmd('cmake -GXcode %s' % os.path.relpath(cmakefile_dir, build_dir))
             else: