后面系數自己調

// 檢測 iPhone
#define iPhone4 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 960), [[UIScreen mainScreen] currentMode].size) : NO)
#define iPhone5 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 1136), [[UIScreen mainScreen] currentMode].size) : NO)
#define iPhone6 ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? (CGSizeEqualToSize(CGSizeMake(750, 1334), [[UIScreen mainScreen] currentMode].size)) : NO)
#define iPhone6Plus ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? (CGSizeEqualToSize(CGSizeMake(1125, 2001), [[UIScreen mainScreen] currentMode].size) || CGSizeEqualToSize(CGSizeMake(1242, 2208), [[UIScreen mainScreen] currentMode].size)) : NO)
#define isPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
#define isRetina ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 960), [[UIScreen mainScreen] currentMode].size) : NO)
#ifdef iPhone6Plus
#define fontKYJ(x) [UIFont systemFontOfSize:x*1.1]
#elif iPhone6
#define fontKYJ(x) [UIFont systemFontOfSize:x*0.8]
#elif iPhone5
#define fontKYJ(x) [UIFont systemFontOfSize:x*0.5]
#elif iPhone4
#define fontKYJ(x) [UIFont systemFontOfSize:x*0.3]
#elif isPad
#define fontKYJ(x) [UIFont systemFontOfSize:x*2]
#endif