To simplify accessing UIColor components

UIColor+Component.swift

//
//  UIColor+Components.swift
//
//  Created by Harshil Shah on 12/08/17.
//  Copyright © 2017 Harshil Shah. All rights reserved.
//

import UIKit

extension UIColor {
    
    enum Component {
        case red, green, blue
        case hue, saturation, brightness
        case white, alpha
    }
    
    func get(component: UIColor.Component) -> CGFloat? {
        var result: CGFloat = 0
        let resultWasFound: Bool
        
        switch component {
        case .red:          resultWasFound = getRed(&result, green: nil, blue: nil, alpha: nil)
        case .green:        resultWasFound = getRed(nil, green: &result, blue: nil, alpha: nil)
        case .blue:         resultWasFound = getRed(nil, green: nil, blue: &result, alpha: nil)
        case .hue:          resultWasFound = getHue(&result, saturation: nil, brightness: nil, alpha: nil)
        case .saturation:   resultWasFound = getHue(nil, saturation: &result, brightness: nil, alpha: nil)
        case .brightness:   resultWasFound = getHue(nil, saturation: nil, brightness: &result, alpha: nil)
        case .white:        resultWasFound = getWhite(&result, alpha: nil)
        case .alpha:        resultWasFound = getWhite(nil, alpha: &result)
        }
        
        if resultWasFound {
            return result
        } else {
            return nil
        }
    }
    
}

UIColor+ComponentSet.swift

//
//  UIColor+ComponentSet.swift
//
//  Created by Harshil Shah on 12/08/17.
//  Copyright © 2017 Harshil Shah. All rights reserved.
//

import UIKit

extension UIColor {
    
    private enum ComponentSet {
        case rgba
        case hsba
    }
    
    private func get(componentSet: UIColor.ComponentSet) -> (CGFloat, CGFloat, CGFloat, CGFloat)? {
        var result: (CGFloat, CGFloat, CGFloat, CGFloat) = (0, 0, 0, 0)
        let resultWasFound: Bool
        
        switch componentSet {
        case .rgba: resultWasFound = getRed(&result.0, green: &result.1, blue: &result.2, alpha: &result.3)
        case .hsba: resultWasFound = getHue(&result.0, saturation: &result.1, brightness: &result.2, alpha: &result.3)
        }
        
        if resultWasFound {
            return result
        } else {
            return nil
        }
    }
    
    func getRGBA() -> (red: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat)? {
        return get(componentSet: .rgba)
    }
    
    func getHSBA() -> (hue: CGFloat, saturation: CGFloat, brightness: CGFloat, alpha: CGFloat)? {
        return get(componentSet: .hsba)
    }
    
}