// 只是简单获取一下图形大小 CCSprite* tmp = CCSprite::create("extensions/background.png"); CCSize size = tmp->getContentSize(); CCRect fullRect = CCRectMake(0,0, size.width, size.height); CCRect insetRect = CCRectMake(3,3,size.width-6, size.height-6); CCLog("wh:%f,%f", size.width, size.height); tmp->release(); // 调用CCScale9Sprite CCScale9Sprite* backGround = CCScale9Sprite::create("extensions/background.png", fullRect, insetRect ); backGround->setPreferredSize(CCSizeMake(300, 30)); backGround->setPosition(ccp(10, 230)); backGround->setAnchorPoint(CCPointZero); addChild(backGround);
加入图片是圆角图片,圆角半径为3,图片大小为16x16,则rectInsets最好设置为(3,3,10,10); 其中,3,3是中间区域的起点,10,10是中间区域的宽高,10是16-2*3的结果.
注意:在测试中发现,如果想要setPreferredSize()或者setContentSize()在收缩图片时生效,则只能用
CCScale9Sprite::create("extensions/background.png", fullRect, insetRect ) 这个构造函数,用
CCScale9Sprite::create("extensions/background.png") 或者
CCScale9Sprite::create(insetRect,"extensions/background.png", )
这两个create函数构造出来的CCScale9Sprite都无法按照理想中的收缩,但拉伸是没问题的!
BUG原因:
CCScale9Sprite* CCScale9Sprite::create(CCRect capInsets, const char* file)的实现有误,应该将该函数中的
if ( pReturn && pReturn->initWithFile(file,capInsets) )
{
pReturn->autorelease();
return pReturn;
}
改为
if ( pReturn && pReturn->initWithFile(capInsets, file) )
{
pReturn->autorelease();
return pReturn;
}
即可