Cocos2d-x使用Javascript开发js绑定C++<代码演示样例>

class IOSiAPDelegate{

    

public:

    virtual ~IOSiAPDelegate() {}

};

class IOSAlipay{

    

public:

    IOSAlipay();

    ~IOSAlipay();

    void iOSProductByIdentifier(std::string &identifier,std::string amount);

    IOSiAPDelegate *delegate;

};

#pragma mark-------------------------IOSAlipay的实现代理方法--------------------------------

IOSAlipay::IOSAlipay():delegate(nil){}

IOSAlipay::~IOSAlipay(){}

void IOSAlipay::iOSProductByIdentifier(std::string &identifier,std::string amount){

    NSLog(@"%s",__FUNCTION__);

    //将产品id存入缓存中

    CCUserDefault* config = CCUserDefault::sharedUserDefault();//先读

    config->setStringForKey ("productIdentifier" , identifier);//存入

    config->flush();//刷新一下

    config->setStringForKey("amount", amount);//将金额传入

    

}

#pragma mark-------------------------IOSAlipay的实现代理方法--------------------------------

#ifndef __iAP_JSBinding__IOSiAP_JSB__

#define __iAP_JSBinding__IOSiAP_JSB__

#include "jsapi.h"

void JSB_register_iOSAlipay(JSContext* cx, JSObject* obj);

#endif /* defined(__iAP_JSBinding__IOSiAP_JSB__) */

#include <stdio.h>

#include "IOSAlipay.h"

#include "ScriptingCore.h"

class IOSAlipay_Bridge : public IOSiAPDelegate

{

public:

    IOSAlipay_Bridge();

    ~IOSAlipay_Bridge();

    IOSAlipay *iap;

    JSObject *jsobj;

};

IOSAlipay_Bridge::IOSAlipay_Bridge(){

    iap = new IOSAlipay();

    iap->delegate = this;

}

IOSAlipay_Bridge::~IOSAlipay_Bridge(){

    delete iap;

}

static JSClass *JSB_IOSAlipay_class = NULL;

static JSObject *JSB_IOSAlipay_object = NULL;

#pragma mark-----绑定的析构函数

static void JSB_IOSAlipay_finalize(JSFreeOp *fop, JSObject *obj)

{

    IOSAlipay_Bridge *bridge = (IOSAlipay_Bridge *)JS_GetPrivate(obj);

    JS_SetPrivate(obj, NULL);

    delete bridge;

}

#pragma mark------初始化构造函数

static JSBool JSB_IOSAlipay_constructor(JSContext *cx, unsigned argc, JS::Value *vp)

{

    if (argc == 0) {

        JSObject *jsobj = JS_NewObject(cx, JSB_IOSAlipay_class, JSB_IOSAlipay_object, NULL);

        IOSAlipay_Bridge *bridge = new IOSAlipay_Bridge();

        bridge->jsobj = jsobj;

        JS_SetPrivate(jsobj, (void *)bridge);

        JS_SET_RVAL(cx, vp, OBJECT_TO_JSVAL(jsobj));

        return JS_TRUE;

    }

    JS_ReportError(cx, "Wrong number of arguments: %d, was expecting: %d", argc, 0);

    return JS_FALSE;

}

#pragma mark------  该方法主要用于处理用于绑定到js中的方法，并接收js传递过来的參数

static JSBool JSB_IOSiAP_iOSProductByIdentifier(JSContext *cx, uint32_t argc, jsval *vp)

{

    JSB_PRECONDITION2(argc==2, cx, JS_FALSE, "Invalid number of arguments");

    jsval *argv = JS_ARGV(cx,vp);

    

    JSObject *obj = (JSObject *)JS_THIS_OBJECT(cx, vp);

    IOSAlipay_Bridge *bridge = (IOSAlipay_Bridge *)JS_GetPrivate(obj);

    

    // safety check for type

    if (JS_FALSE == JSVAL_IS_STRING(argv[0])) {

        JS_SET_RVAL(cx, vp, JSVAL_VOID);

        return JS_TRUE;

    }

    JSString *jsIdentifier = JSVAL_TO_STRING(argv[0]);//获取产品ID

    JSStringWrapper wrapper(jsIdentifier);

    std::string identifier = wrapper.get();

    JSString *jsPrice = JSVAL_TO_STRING(argv[1]);//获得价格

    JSStringWrapper pWrapper(jsPrice);

    std::string price = pWrapper.get();

    bridge->iap->iOSProductByIdentifier(identifier,price);//传入方法參数

    

    return JS_TRUE;

}

#pragma mark----------------------创建处理JS绑定对象类

static void JSB_IOSAlipay_createClass(JSContext *cx, JSObject* globalObj, const char* name)

{

JSB_IOSAlipay_class = (JSClass *)calloc(1, sizeof(JSClass));

    // 类型名称为 **IOSAlipay** 正式绑定到 js 由 js 调用的名称

JSB_IOSAlipay_class->name = name;

JSB_IOSAlipay_class->addProperty = JS_PropertyStub;

JSB_IOSAlipay_class->delProperty = JS_PropertyStub;//JS_DeletePropertyStub;

JSB_IOSAlipay_class->getProperty = JS_PropertyStub;

JSB_IOSAlipay_class->setProperty = JS_StrictPropertyStub;

JSB_IOSAlipay_class->enumerate = JS_EnumerateStub;

JSB_IOSAlipay_class->resolve = JS_ResolveStub;

JSB_IOSAlipay_class->convert = JS_ConvertStub;

JSB_IOSAlipay_class->finalize = JSB_IOSAlipay_finalize;

JSB_IOSAlipay_class->flags = JSCLASS_HAS_PRIVATE;

//    JSCLASS_HAS_PRIVATE;   JSCLASS_HAS_RESERVED_SLOTS(2)

    // no property for this class

static JSPropertySpec properties[] = {

        {0, 0, 0, 0, 0}

};

    // 设定绑定函数。函数名 "iOSProductByIdentifier"，绑定函数 "JSB_IOSiAP_iOSProductByIdentifier"

    // 后面能够加入其他函数绑定，假设须要，之后以 "JS_FS_END" 结尾

    // define member function

static JSFunctionSpec funcs[] = {

        JS_FN("iOSProductByIdentifier", JSB_IOSiAP_iOSProductByIdentifier,1, JSPROP_PERMANENT | JSPROP_ENUMERATE),

JS_FS_END

};

    // 这里定义而且绑定了静态函数(static)，包含方法名 "create"和相应的绑定实现

static JSFunctionSpec st_funcs[] = {

JS_FS_END

};

JSB_IOSAlipay_object = JS_InitClass(

                                      cx,globalObj,

                                      NULL,

                                      JSB_IOSAlipay_class,

                                      JSB_IOSAlipay_constructor,0,//这里绑定的是构造函数的实现。也就是用js-new操作符创建的对象

                                      properties,

                                      funcs,// 函数绑定

                                      NULL,// no static properties

                                      st_funcs);// 静态函数绑定

}

#pragma mark ----注冊绑定方法  让JS 可以找到 全部类

/**

 *  该方法主要在 本程序中的 GameEnter.cpp中进行集体绑定

 *  sc->addRegisterCallback(JSB_register_iOSiAP);

 *

 *  @param cx  上下文

 *  @param obj 对象

 *  @return 返回值

 */

// extern init function

void JSB_register_iOSAlipay(JSContext* cx, JSObject* obj)

{

    // define name space

    JSObject *myBinding = JS_NewObject(cx, NULL, NULL, NULL);

    js::RootedValue myBindingVal(cx);

    myBindingVal = OBJECT_TO_JSVAL(myBinding);

JS_SetProperty(cx, obj, "MyBinding", (jsval *)&myBindingVal);

    // register class

    JSB_IOSAlipay_createClass(cx, myBinding, "IOSAlipay");

}