Get a more human-readable device model name. So get the "iPhone5,1" type format and translate it into "iPhone 5" or whatever.

getDeviceModel.swift

/*	Sample functions to use to get the machine name (aka device model) in iOS 8

	Use this by copying these methods into your project in the appropriate place.
	Clearly this is not an actual class file.  Likely at some point I'll make
	a UIDevice category that has this and other handy functions.

	Malcolm Teas, August 2015 */

    /**
	Raw device model method
	Returns a string of the raw device model like "iphone5,1"  Not much use 
	for humans since no one really remembers these values well.  But useful for below. */
    func getRawDeviceModel() -> String {
        var size: size_t = 0
        sysctlbyname("hw.machine", nil, &size, nil, 0);
        
        var machine = [CChar](count: Int(size), repeatedValue: 0)
        sysctlbyname("hw.machine", &machine, &size, nil, 0);

        return String.fromCString(machine)!
    }
    
    /**
	Human readable-string method
	Returns a human-useful string of the iPhone model name based on the raw name. */
    func getDeviceModel() -> String {
        let model = getRawDeviceModel()
        
        /*  This is Swift code, so we don't need to handle anything below iPhone 4.
            See http://theiphonewiki.com/wiki/IPhone for reference to update.  This
	    will have to be udpated ever fall when Apple releases new phones. */

        switch model  {
        case "iPhone3,1": return "iPhone 4"
        case "iPhone3,2": return "iPhone 4"
        case "iPhone3,3": return "iPhone 4"

        case "iPhone4,1": return "iPhone 4S"

        case "iPhone5,1": return "iPhone 5"
        case "iPhone5,2": return "iPhone 5"
        case "iPhone5,3": return "iPhone 5C"
        case "iPhone5,4": return "iPhone 5C"

        case "iPhone6,1": return "iPhone 5S"
        case "iPhone6,2": return "iPhone 5S"

        case "iPhone7,2": return "iPhone 6+"
        case "iPhone7,1": return "iPhone 6"
        default: return "-"
        }
    }