cocos2d-x之Ref列表容器(实例：_

cocos2d-x之Ref列表容器(实例：__Array容器)

cocos2d-x之Ref列表容器(实例：__Array容器)

HelloWorldScene.h

 1 #ifndef __HELLOWORLD_SCENE_H__
 2 #define __HELLOWORLD_SCENE_H__
 3 
 4 #include "cocos2d.h"
 5 
 6 #define MAX_COUNT 100
 7 //定义宏，定义了一次生成的精灵数
 8 
 9 
10 class HelloWorld : public cocos2d::Layer
11 {
12     //声明—__Array * 的成员变量list
13     cocos2d::__Array *list;
14 
15 public:
16 
17     //声明析构函数，需要在析构函数中释放成员变量
18     ~HelloWorld();
19 
20     // there's no 'id' in cpp, so we recommend returning the class instance pointer
21     static cocos2d::Scene* createScene();
22 
23     // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone
24     virtual bool init();  
25     
26     // a selector callback
27     void menuCloseCallback(cocos2d::Ref* pSender);
28     
29     // implement the "static create()" method manually
30     CREATE_FUNC(HelloWorld);
31 };
32 
33 #endif // __HELLOWORLD_SCENE_H__

HelloWorldScene.cpp

  1 #include "HelloWorldScene.h"
  2 
  3 USING_NS_CC;
  4 
  5 
  6 HelloWorld::~HelloWorld(){
  7 
  8     //移除容器中的所有对象，但还没有释放list容器对象本身
  9     this->list->removeAllObjects();
 10     //安全释放成员变量list容器对象，
 11     //CC_SAFE_RELEASE_NULL是将list容器对象释放后再赋予nullptr
 12     CC_SAFE_RELEASE_NULL(this->list);
 13 
 14 }
 15 
 16 Scene* HelloWorld::createScene()
 17 {
 18     // 'scene' is an autorelease object
 19     auto scene = Scene::create();
 20     
 21     // 'layer' is an autorelease object
 22     auto layer = HelloWorld::create();
 23 
 24     // add layer as a child to scene
 25     scene->addChild(layer);
 26 
 27     // return the scene
 28     return scene;
 29 }
 30 
 31 // on "init" you need to initialize your instance
 32 bool HelloWorld::init()
 33 {
 34     //////////////////////////////
 35     // 1. super init first
 36     if ( !Layer::init() )
 37     {
 38         return false;
 39     }
 40     
 41     Size visibleSize = Director::getInstance()->getVisibleSize();
 42     Vec2 origin = Director::getInstance()->getVisibleOrigin();
 43 
 44     auto goItem = MenuItemImage::create("go-down.png", "go-up.png", CC_CALLBACK_1(HelloWorld::menuCloseCallback, this));
 45     goItem->setPosition(Vec2(origin.x + visibleSize.width - goItem->getContentSize().width / 2, origin.y + goItem->getContentSize().height / 2));
 46 
 47     auto menu = Menu::create(goItem, NULL);
 48     menu->setPosition(Vec2::ZERO);
 49     this->addChild(menu);
 50 
 51     //创建__Array类型的list成员变量，使用createWithCapacity函数，参数是list容器的初始化容量
 52     this->list = __Array::createWithCapacity(MAX_COUNT);
 53     //采用静态函数createWithCapacity创建的list容器对象是autorelease的，
 54     //如果不调用retain()函数保持内存，
 55     //当init函数结束时，
 56     //list容器对象会自动释放，
 57     //这样在其他函数中在使用list就会出错
 58     this->list->retain();
 59 
 60     for (int i = 0; i < MAX_COUNT; i++){
 61         //循环创建精灵对象
 62         Sprite *sprite = Sprite::create("Ball.png");
 63         //将精灵添加到list容器对象中，但是这些精灵还没有被添加到场景中，因此，场景显示的时候他们是不出现的
 64         this->list->addObject(sprite);
 65     }
 66     
 67     return true;
 68 }
 69 
 70 
 71 void HelloWorld::menuCloseCallback(Ref* pSender)
 72 {
 73 //#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)
 74 //    MessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");
 75 //    return;
 76 //#endif
 77 //
 78 //    Director::getInstance()->end();
 79 //
 80 //#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
 81 //    exit(0);
 82 //#endif
 83 
 84     /**************************
 85     测试 包装类"Value"
 86     ***************************
 87     Value v1;
 88     CCASSERT(v1.isNull(), "");//判断v1是否为空
 89 
 90     Value v2(100);//创建int类型的Value对象
 91     //输出对象的描述信息，类似于java中的 toString（）
 92     log("<><> The description of the integer value:%s  <><>", v2.getDescription().c_str());
 93     log("<><>  v2.asByte() = %c <><>", v2.asByte());//将v2转换为byte类型
 94 
 95     Value v3(101.4f);
 96     log("<><> The description of the float value:%s  <><>", v3.getDescription().c_str());
 97 
 98     Value v4(106.1);
 99     log("<><> The description of the double value:%s  <><>", v4.getDescription().c_str());
100     log("<><>  v4.asInt() = %d <><>", v4.asInt());
101 
102     unsigned char byte = 50;
103     Value v5(byte);
104     log("<><> The description of the byte value:%s  <><>", v5.getDescription().c_str());
105 
106     Value v6(true);
107     log("<><> The description of the boolean value:%s  <><>", v6.getDescription().c_str());
108 
109     Value v7("123");
110     log("<><> The description of the string value:%s  <><>", v7.getDescription().c_str());
111     log("<><>  v7.asInt() = %d <><><>", v7.asInt());
112 
113     **************************
114     测试 包装类"Value"
115     ***************************/
116 
117 
118     log("><>><><>  list->count() = %d  <>>><>>", this->list->count());
119     Size visibleSize = Director::getInstance()->getVisibleSize();
120 
121     Ref *obj = nullptr;
122 
123     //使用宏，循环遍历list容器中的数据
124     CCARRAY_FOREACH(this->list, obj){
125     
126         //获得精灵对象
127         Sprite *sprite = (Sprite *)obj;
128 
129         //随机产生x轴坐标，CCRANDOM_0_1宏是随机产生0~1之间的随机数的宏
130         int x = CCRANDOM_0_1() *visibleSize.width;
131         int y = CCRANDOM_0_1() *visibleSize.height;
132 
133         sprite->setPosition(Vec2(x, y));
134         this->removeChild(sprite);
135         this->addChild(sprite);
136     
137     }
138 
139 }