//***宏定义

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

 

然后:

if(iPhone5){

//***具体操作

}else{

 

//***具体操作


 


}