iOS 判斷iphone ipad 系統版本

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#define ScreenWidth  ([[UIScreen mainScreen] bounds].size.width)#define ScreenHeight ([[UIScreen mainScreen] bounds].size.height)#define iOS8 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)#define iOS7 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)#define iOS6 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 6.0)#define isPad   (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad   ? YES : NO)#define isPhone (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone ? YES : NO)#define isRetina ([[UIScreen mainScreen] scale] > 1 ? YES : NO)

iOS 判斷iphone ipad 系統版本