Cocos2D 初步了解二:图层与精灵

一、给图层添加背景

CCSprite mBGSprite = CCSprite.sprite("bbg_arena.jpg");
mBGSprite.setAnchorPoint(0,0);
this.addChild(mBGSprite);

二、给图层CCLayer添加事件
1)打开触摸事件的开关
setIsTouchEnabled(true);

2)首先得把Android事件里的坐标转换为Cocos2D的坐标
CGPoint point = this.convertPrevTouchToNodeSpace(event);

三、代码实现

public class FirstLayer extends CCLayer {

    //人精灵
    private CCSprite mSprite;

    public FirstLayer() {
        //打开触摸事件的开关
        setIsTouchEnabled(true);
        //初始化
        init();
    }

    private void init() {
        //第三步：创建背景精灵
        CCSprite mBGSprite = CCSprite.sprite("bbg_arena.jpg");
        mBGSprite.setAnchorPoint(0,0);
        this.addChild(mBGSprite);

        mSprite = CCSprite.sprite("z_1_attack_01.png");
        //设置图片锚点坐标
        mSprite.setAnchorPoint(0,0);
        mSprite.setPosition(100,100);
        mSprite.setScale(1);
        mSprite.setOpacity(150);
        //第二步：把精灵添加到图层上
        this.addChild(mSprite);
    }

    @Override
    public boolean ccTouchesBegan(MotionEvent event) {
        //Toast.makeText(Util.getContext(), "我被点击了", 1).show();
        //得到触摸时的点
        CGPoint point = this.convertTouchToNodeSpace(event);
        //得到精灵的矩阵
        CGRect box = mSprite.getBoundingBox();
        //如果点在矩阵里,就说名点击了
        if (CGRect.containsPoint(box, point)) {
            //精灵放大
            mSprite.setScale(mSprite.getScale() + 0.2);
        }else {
            //变小
            mSprite.setScale(mSprite.getScale() - 0.2);
        }
        return super.ccTouchesBegan(event);
    }


}