3.5inch vs 4inch 구별법 && Retina vs Non Retina

#define IS_4_INCH_DEVICE CGSizeEqualToSize([UIScreen mainScreen].bounds.size, CGSizeMake(320, 568)) || CGSizeEqualToSize([UIScreen mainScreen].bounds.size, CGSizeMake(568, 320))

#define ISRETINA ([[UIScreen mainScreen] respondsToSelector:@selector(scale)])?([[UIScreen mainScreen] scale] == 2.0):(0)

*.pch 파일에 붙여 넣기

if(IS_4_INCH_DEVICE) {

// 4inch

}

else {

// 3.5inch

}

if(ISRETINA) {

// 4inch

}

else {

// 3.5inch

}