ios版本和设备类型的判断

判断设备是否是ipad

BOOL isPad(){

#ifdef UI_USER_INTERFACE_IDIOM

    return(UI_USER_INTERFACE_IDIOM()== UIUserInterfaceIdiomPad);

#else

    return NO;

#endif

}

判断设备是否是iphone5

 #define iPhone5([UIScreen instancesRespondToSelector:@selector(currentMode)]? CGSizeEqualToSize(CGSizeMake(640,1136), [[UIScreenmainScreen] currentMode].size): NO)

判断当前设备的版本

[[[UIDevice currentDevice]systemVersion] floatValue]

写成宏

 #define IOS_VERSION[[[UIDevice currentDevice] systemVersion] floatValue]