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ColorHelpers.swift

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+//
+//  ColorHelpers.swift
+//  HRecipes
+//
+//  Created by MadGeorge on 10/12/2016.
+//  Copyright © 2016 MadGeorge. All rights reserved.
+//
+
+import Foundation
+import UIKit
+
+extension UIColor {
+    /**
+     Create UIcolor from color hex representation
+
+     - Parameter hex: color hex string representation like #333333 or CCCCCC
+     - Returns color from hex
+
+     **Example:** 
+       ```
+       colorWithHexString("#333333")
+       colorWithHexString("333333")
+       colorWithHexString("CCCCCC")
+       colorWithHexString("5f9eb7")
+       ```
+     */
+    class func colorWithHexString (_ hex:String) -> UIColor {
+        var cString: String = hex.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines).uppercased();
+
+        if (cString.hasPrefix("#")) {
+            cString = (cString as NSString).substring(from: 1)
+        }
+
+        if (cString.characters.count != 6) {
+            return UIColor.gray
+        }
+
+        let rString = (cString as NSString).substring(to: 2)
+        let gString = ((cString as NSString).substring(from: 2) as NSString).substring(to: 2)
+        let bString = ((cString as NSString).substring(from: 4) as NSString).substring(to: 2)
+
+        var r:CUnsignedInt = 0, g:CUnsignedInt = 0, b:CUnsignedInt = 0;
+        Scanner(string: rString).scanHexInt32(&r)
+        Scanner(string: gString).scanHexInt32(&g)
+        Scanner(string: bString).scanHexInt32(&b)
+
+        return UIColor(red: CGFloat(r) / 255.0, green: CGFloat(g) / 255.0, blue: CGFloat(b) / 255.0, alpha: CGFloat(1))
+    }
+
+    /// Retutns default tint color #007AFF
+    class func defaultTintColor() -> UIColor {
+        // #007AFF
+        return UIColor(red: 0.0, green: 122.0/255.0, blue: 1.0, alpha: 1.0)
+    }
+}

GobalFunctions.swift

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+//
+//  GobalFunctions.swift
+//  HRecipes
+//
+//  Created by MadGeorge on 28/11/16.
+//  Copyright © 2016 MadGeorge. All rights reserved.
+//
+
+import Foundation
+
+/// Shortcut for NSLocalizedString with empty comment
+func L(_ key: String) -> String {
+    return NSLocalizedString(key, comment: "")
+}
+
+/// Run closure in background
+func future(closure: @escaping ()->()) {
+    let backQueue = DispatchQueue.global()
+    backQueue.async(execute: closure)
+}
+
+/// Run closure after delay on main thread
+func delayCall(delayInSeconds: Double, closure: @escaping()->()) {
+    let delay = DispatchTime.now() + delayInSeconds
+    DispatchQueue.main.asyncAfter(deadline: delay) {
+        closure()
+    }
+}
+
+/// Run any closure on main thread explisitly
+func ui(closure: @escaping ()->()){
+    DispatchQueue.main.async(execute: closure)
+}

GradientView.swift

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+import UIKit
+
+/// Designable view with linear gradient settings
+@IBDesignable
+class GradientView: UIView {
+
+    @IBInspectable var topGradientColor: UIColor!
+    @IBInspectable var bottomGradientColor: UIColor!
+    @IBInspectable var locationTop: CGFloat = 0.0
+    @IBInspectable var locationBottom: CGFloat = 1.0
+
+    override func awakeFromNib() {
+        super.awakeFromNib()
+
+        backgroundColor = UIColor.clear
+    }
+
+    override func draw(_ rect: CGRect) {
+        let colorSpace = CGColorSpaceCreateDeviceRGB();
+        let context = UIGraphicsGetCurrentContext();
+
+        let gradientColors = [topGradientColor.cgColor, bottomGradientColor.cgColor];
+
+        let gradientLocations: [CGFloat] = [locationTop, locationBottom]
+
+        let gradient = CGGradient(colorsSpace: colorSpace, colors: gradientColors as CFArray, locations: gradientLocations)
+
+        let startPoint = CGPoint(x: 0, y: 0)
+
+        let endPoint = CGPoint(x: 0, y: bounds.height)
+
+        context?.drawLinearGradient(gradient!, start: startPoint, end: endPoint, options: [])
+    }
+
+}
+
+/// Designable view with radial gradient settings
+@IBDesignable
+class RadialGradientView: UIView {
+
+    @IBInspectable var topGradientColor: UIColor! = UIColor.black
+    @IBInspectable var bottomGradientColor: UIColor! = UIColor.white
+    @IBInspectable var startRadius: CGFloat = 10
+
+    override func awakeFromNib() {
+        super.awakeFromNib()
+
+        backgroundColor = UIColor.clear
+    }
+
+    override func draw(_ rect: CGRect) {
+        let colorSpace = CGColorSpaceCreateDeviceRGB();
+        let context = UIGraphicsGetCurrentContext();
+
+        let gradientColors = [topGradientColor.cgColor, bottomGradientColor.cgColor];
+
+        let gradientLocations: [CGFloat] = [0.0, 1.0]
+
+        let gradient = CGGradient(colorsSpace: colorSpace, colors: gradientColors as CFArray, locations: gradientLocations)
+
+        var radius = frame.width
+        if radius < frame.height {
+            radius = frame.height
+        }
+
+        context?.drawRadialGradient(gradient!, startCenter: center, startRadius: startRadius, endCenter: center, endRadius: radius, options: [])
+    }
+
+}

UIViewControllerHelpers.swift

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+//
+//  UIViewControllerHelpers.swift
+//  HRecipes
+//
+//  Created by MadGeorge on 10/12/2016.
+//  Copyright © 2016 MadGeorge. All rights reserved.
+//
+
+import UIKit
+
+extension UIViewController {
+
+    /// Present simple alert with title, message and cancel button
+    func alertSimple(_ title: String, message: String?, cancelTitle: String? = NSLocalizedString("alert_close_btn", comment: "")) {
+        let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
+        alert.addAction(UIAlertAction(title: L("alert_close_btn"), style: .cancel, handler: { a in}))
+        present(alert, animated: true, completion: nil)
+    }
+
+    func alertNotYet() {
+        alertSimple(L("Not implemented yet"), message: L("Implementation of this functionnality is in progress."))
+    }
+
+}
+
+/// View controller which hide it's title on disappear, so next controller back button title will be empty
+class HideBarTitleVC: UIViewController {
+
+    var titleText: String? {
+        didSet {
+            navigationItem.title = titleText
+        }
+    }
+
+    override func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+
+        navigationItem.title = ""
+    }
+
+    override func viewDidAppear(_ animated: Bool) {
+        super.viewDidAppear(animated)
+
+        navigationItem.title = titleText
+    }
+
+}
+
+/// Table view controller which hide it's title on disappear, so next controller back button title will be empty
+class HideBarTitleTVC: UITableViewController {
+
+    var titleText: String? {
+        didSet {
+            navigationItem.title = titleText
+        }
+    }
+
+    override func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+
+        navigationItem.title = ""
+    }
+
+    override func viewDidAppear(_ animated: Bool) {
+        super.viewDidAppear(animated)
+
+        navigationItem.title = titleText
+    }
+
+}
+
+/// Collection view controller which hide it's title on disappear, so next controller back button title will be empty
+class HideBarTitleCVC: UICollectionViewController {
+
+    var titleText: String? {
+        didSet {
+            navigationItem.title = titleText
+        }
+    }
+
+    override func viewWillDisappear(_ animated: Bool) {
+        super.viewWillDisappear(animated)
+
+        navigationItem.title = ""
+    }
+
+    override func viewDidAppear(_ animated: Bool) {
+        super.viewDidAppear(animated)
+
+        navigationItem.title = titleText
+    }
+
+}
+