Constants in Swift

constants.swift

// My way of doing constants in Swift. 
// Usage example: if(Constants.debug) { println("debug message") }

struct Constants {
    
    // App wide things:
    static let debug = true
    static let production = true
    static let appVersion =  "iOS-0.1.0b300"
    static let apiBase = "http://api.com/1"

    // Subgroups: 
    struct Colors {
        
        static let blue = UIColor.fromRGB(0x7AA1BE)
        static let green = UIColor.fromRGB(0x6EBE78)
        static let red = UIColor.fromRGB(0xEA4240)
        
    }
    
    struct Devices {

        static let iPhone4 = UIScreen.mainScreen().scale == 2.0 && UIScreen.mainScreen().bounds.size.height == 480.0
        static let iPhone5 = UIScreen.mainScreen().scale == 2.0 && UIScreen.mainScreen().bounds.size.height == 568.0
        static let iPhone6 = UIScreen.mainScreen().scale == 2.0 && UIScreen.mainScreen().bounds.size.height == 667.0
        static let iPhone6plus = UIScreen.mainScreen().scale == 3.0 && UIScreen.mainScreen().bounds.size.height == 736.0
        
    }
    
    struct Placeholders {
        
        static let namePlaceholder = "What's your name?"!
        
    }
}