如何使用JavaScriptCore将C++对象传递给JavaScript函数

#include <JavaScriptCore/JavaScriptCore.h>

// 定义一个C++对象
class MyObject {
public:
    void printMessage(const char* message) {
        printf("Message: %s\n", message);
    }
};

// JavaScript函数的回调
void jsCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception) {
    // 获取C++对象
    MyObject* myObject = static_cast<MyObject*>(JSObjectGetPrivate(thisObject));
    
    // 获取参数
    JSStringRef messageRef = JSValueToStringCopy(context, arguments[0], exception);
    const char* message = JSStringGetUTF8CString(messageRef);
    
    // 调用C++对象的方法
    myObject->printMessage(message);
    
    // 释放内存
    JSStringRelease(messageRef);
}

int main() {
    // 创建JavaScript上下文
    JSGlobalContextRef context = JSGlobalContextCreate(NULL);
    
    // 创建一个JavaScript函数
    JSStringRef functionNameRef = JSStringCreateWithUTF8CString("myFunction");
    JSObjectRef function = JSObjectMakeFunctionWithCallback(context, functionNameRef, jsCallback);
    
    // 将C++对象注册到JavaScript上下文
    MyObject myObject;
    JSObjectRef jsObject = JSObjectMake(context, NULL, &myObject);
    JSObjectSetPrivate(jsObject, &myObject);
    
    // 将JavaScript函数绑定到全局对象上
    JSObjectSetProperty(context, JSContextGetGlobalObject(context), functionNameRef, function, kJSPropertyAttributeNone, NULL);
    
    // 执行JavaScript代码
    JSStringRef scriptRef = JSStringCreateWithUTF8CString("myFunction('Hello from JavaScript!');");
    JSEvaluateScript(context, scriptRef, NULL, NULL, 0, NULL);
    
    // 释放内存
    JSStringRelease(functionNameRef);
    JSStringRelease(scriptRef);
    JSGlobalContextRelease(context);
    
    return 0;
}