if([[[UIDevice currentDevice] systemVersion] floatValue] >= 3.2f)

            {

                CGRect winRect = [[UIScreen mainScreen] bounds];

                CCLOG("winRect w = %f, h = %f", winRect.size.width, winRect.size.height);

                CGSize winSize = [[UIScreen mainScreen] currentMode].size;

                CCLOG("currentModeSize w %f  h%f", winSize.width, winSize.height);

                bool isRetina =

                [UIScreen instancesRespondToSelector:@selector(currentMode)] ?

                CGSizeEqualToSize(CGSizeMake(winRect.size.width*2, winRect.size.height*2), winSize)

                ||CGSizeEqualToSize(CGSizeMake(winRect.size.height*2, winRect.size.width*2), winSize)

                : FALSE;

            }

//判断设备是否是高清设备