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), [[UIScreen
mainScreen] 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]