鸿蒙HarmonyOS应用开发之Native与ArkTS对象绑定

场景介绍

通过napi_wrap将ArkTS对象与Native的C++对象绑定，后续操作时再通过napi_unwrap将ArkTS对象绑定的C++对象取出，并对其进行操作。

使用示例

1. 接口声明、编译配置以及模块注册

   接口声明

// index.d.ts
export class MyObject {
   constructor(arg: number);
   plusOne: () => number;

   public get value();
   public set value(newVal: number);
}

编译配置

// CMakeLists.txt
# the minimum version of CMake.
cmake_minimum_required(VERSION 3.4.1)
project(object_wrap)

set(NATIVERENDER_ROOT_PATH ${CMAKE_CURRENT_SOURCE_DIR})

include_directories(${NATIVERENDER_ROOT_PATH}
                    ${NATIVERENDER_ROOT_PATH}/include)

add_definitions("-DLOG_DOMAIN=0x0000")
add_definitions("-DLOG_TAG=\"testTag\"")

add_library(object_wrap SHARED object_wrap.cpp)
target_link_libraries(object_wrap PUBLIC libace_napi.z.so libhilog_ndk.z.so)

模块注册

// object_wrap.cpp
class MyObject {
 public:
  static napi_value Init(napi_env env, napi_value exports);
  static void Destructor(napi_env env, void* nativeObject, void* finalize_hint);

 private:
  explicit MyObject(double value_ = 0);
  ~MyObject();

  static napi_value New(napi_env env, napi_callback_info info);
  static napi_value GetValue(napi_env env, napi_callback_info info);
  static napi_value SetValue(napi_env env, napi_callback_info info);
  static napi_value PlusOne(napi_env env, napi_callback_info info);

  double value_;
  napi_env env_;
  napi_ref wrapper_;
};

static thread_local napi_ref g_ref = nullptr;

MyObject::MyObject(double value)
    : value_(value), env_(nullptr), wrapper_(nullptr) {}

MyObject::~MyObject()
{
  napi_delete_reference(env_, wrapper_);
}

void MyObject::Destructor(napi_env env,
                          void* nativeObject,