cocos2dx常用功能-Cocos2dx开发常用控件详解（共11部分）

Cocos2dx游戏开发 第三阶段：常用功能1

1---Cocos2dx常用功能-Cocos2dx开发常用控件详解

    //是否显示左下角的帧频数据

    director->setDisplayStats(true);

    // set FPS. the default value is 1.0/60 if you don't call this

    //显示每一帧的时间间隔

    director->setAnimationInterval(1.0/ 10);

2.Cocos2d-x 之Sprite    视频很重点

    Sprite *s = Sprite::create("img.jpg");
    s->setAnchorPoint(Point(0,0));
    s->setPosition(Point(100,200));

    addChild(s);

3.Cocos2d-x之Director、Scene、Layer

    Scene *scene = Scene::create();
    Layer *layer = Layer::create();
    scene->addChild(layer);
   
    Sprite *s = Sprite::create("HelloWorld.png");
    s->setAnchorPoint(Point(0,0));

    layer->addChild(s);

4.Cocos2d-x之Log

跨平台日志输出API

  log("Hello Cocos2dx %d",200);

5.Cocos2d-x之MessageBox

    MessageBox("消息内容","消息标题");

attach /ə'tætʃ/附加；附属      detach/dɪ'tætʃ/vt. 分离；派遣

6.Cocos2d-x之LabelTTF:

    Size size = Director::getInstance()->getVisibleSize();
    LabelTTF *label = LabelTTF::create();
    label->setString("Hello jikexueyuan");
    label->setFontSize(36);
    label->setPosition(size.width/2, size.height/2);

    addChild(label);

  

7.Cocos2d-x之TextFieldTTF

    SizevisibleSize = Director::getInstance()->getVisibleSize();
   
    TextFieldTTF *tf = TextFieldTTF::textFieldWithPlaceHolder("在这里输入","宋体",20);
   
    tf->setPosition(visibleSize.width/2, visibleSize.height/2);
   
    addChild(tf);
   
   
    auto listener = EventListenerTouchOneByOne::create();
    listener->onTouchBegan= [tf](Touch*t,Event*event){
       
        if (tf->getBoundingBox().containsPoint(t->getLocation())) {
            tf->attachWithIME();
        }else{
            tf->detachWithIME();
        }
       
        return false;
    };
   

    Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, tf);

8.Cocos2d-x之创建自定义类

Ball.h中

#include<iostream>
#include "cocos2d.h"

usingnamespacecocos2d;


classBall:publicSprite {
   
public:
    virtual bool init();
   
    CREATE_FUNC(Ball);
   
//    static Ball* create(){
//       
//        Ball * b = new Ball();
//        b->init();
//        b->autorelease();
//       
//        return b;
//    }

};

Ball.cpp中

#include"Ball.h"

boolBall::init(){   

    initWithFile("ball.png");   

    return true;

}

HelloWorldScene.cpp中：

autob = Ball::create();

   b->setPosition(200,200);

    addChild(b);

9.Cocos2d-x之内存管理机制

    Object *obj = new Object();

    obj->autorelease();

    log("count:%d",obj->getReferenceCount());

    永远不要使用delete obj

10.Cocos2d-x之Menu

闭包是C++11的特性

    auto menu = Menu::create(MenuItemImage::create("normal.png","selected.png", [](Object* obj){

        log("menu item touched”);//松开手后执行

    }), NULL);

    addChild(menu);

11.Cocos2d-x之TableView

有一个列表项它曾经呈现出来了，在往上面拖动的时候 处于不呈现的状态（拖出去界面）这个列表项会被回收

放到TableView的一个队列里面，如果有新的列表项需要呈现出来，会先从回收的队列里面去查找有没有已经回收过的，有回收过得会直接使用，没有回收过得需要重新创建

HelloWorldScene.h：

#include"cocos2d.h"

#include<cocos-ext.h>

USING_NS_CC_EXT;
USING_NS_CC;

classHelloWorld : public cocos2d::Layer,TableViewDataSource,TableViewDelegate
{
public:
    // there's no 'id' in cpp, so we recommend returning the class instance pointer
    static cocos2d::Scene* createScene();

    // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone
    virtual bool init(); 
   
    // a selector callback
    void menuCloseCallback(Object* pSender);
   
    // implement the "static create()" method manually
    CREATE_FUNC(HelloWorld);
   
   
public:
    /**
     * cell height for a given table.
     *
     * @param table table to hold the instances of Class
     * @return cell size
     */
    virtual Size cellSizeForTable(TableView *table);
    /**
     * a cell instance at a given index
     *
     * @param idx index to search for a cell
     * @return cell found at idx
     */
    virtual TableViewCell* tableCellAtIndex(TableView *table, ssize_t idx);
    /**
     * Returns number of cells in a given table view.
     *
     * @return number of cells
     */
    virtual ssize_t numberOfCellsInTableView(TableView *table);
   
public:
   
    /**
     * Delegate to respond touch event
     *
     * @param table table contains the given cell
     * @param cell  cell that is touched
     * @js NA
     * @lua NA
     */
    virtual void tableCellTouched(TableView* table, TableViewCell* cell);
   
    /**
     * @js NA
     * @lua NA
     */
    virtual void scrollViewDidScroll(ScrollView* view){};
    /**
     * @js NA
     * @lua NA
     */
    virtual void scrollViewDidZoom(ScrollView* view){};
};

#endif// __HELLOWORLD_SCENE_H__

HelloWorldScene.cpp：

#include"HelloWorldScene.h"

USING_NS_CC;

Scene* HelloWorld::createScene()
{
    // 'scene' is an autorelease object
    auto scene = Scene::create();
   
    // 'layer' is an autorelease object
    auto layer = HelloWorld::create();

    // add layer as a child to scene
    scene->addChild(layer);

    // return the scene
    return scene;
}

// on "init" you need to initialize your instance
boolHelloWorld::init()
{
    //////////////////////////////
    // 1. super init first
    if ( !Layer::init() )
    {
        return false;
    }
   
    TableView * tv = TableView::create(this, Size(300,300));
    tv->setAnchorPoint(Point(0,0));
    tv->setPosition(100,0);
    tv->setDelegate(this);
    addChild(tv);
   
   
    return true;
}


Size HelloWorld::cellSizeForTable(cocos2d::extension::TableView *table){
    return Size(300,50);
}

TableViewCell* HelloWorld::tableCellAtIndex(cocos2d::extension::TableView *table, ssize_t idx){
   
    TableViewCell *cell = table->dequeueCell();
    LabelTTF *label;
   
    if (cell==NULL) {
        cell = TableViewCell::create();
        label = LabelTTF::create();
        label->setTag(2);
        label->setFontSize(30);
        label->setAnchorPoint(Point(0,0));
        cell->addChild(label);
    }else{
        label = (LabelTTF*)cell->getChildByTag(2);
    }
   
    label->setString(StringUtils::format("Label %ld",idx));
   
    return cell;
}


ssize_t HelloWorld::numberOfCellsInTableView(cocos2d::extension::TableView *table){
    return 100;
}


voidHelloWorld::tableCellTouched(cocos2d::extension::TableView *table, cocos2d::extension::TableViewCell *cell){
   
    LabelTTF *label = (LabelTTF*)cell->getChildByTag(2);
    log("%s",label->getString().c_str());
   
}


voidHelloWorld::menuCloseCallback(Object* pSender)
{
    Director::getInstance()->end();

#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    exit(0);
#endif

}