How to detect if the device is an iPhone 5? [duplicate]

Answer 1

Answer is here. Basically, you don't. Use the new constraint layout system in iOS 6. You'll be chasing your tail if you have to rev your layout for every new device with a different screen size/resolution.

Answer 2

For my universal app, Forex App, I'm simply using the screen height detection concept like so:

CGSize screenSize = [[UIScreen mainScreen] bounds].size;

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
    if (screenSize.height > 480.0f) {
        /*Do iPhone 5 stuff here.*/
    } else {
        /*Do iPhone Classic stuff here.*/
    }
} else {
    /*Do iPad stuff here.*/
}