添加图片精灵没有充满全屏

Cocos2d-x
#1

CGSize size = winSize];

float proportionX;
float proportionY;

    CCSprite * background =  initWithFile:@"liuwei.jpg" rect:CGRectMake(0, 0, 200, 150)];
    proportionX = size.width/200;
    proportionY = size.height/150;
    ;
    ;

    ;



    ;

file:///Users/wuren/Desktop/屏幕快照%202014-08-17%20上午11.28.36.png