TiagoBras’s gists

TiagoBras / ActionSheetAnimationController.swift

Created April 18, 2019 11:37

Animated transition that makes the view controller slide in from the bottom and dims the background

	import UIKit

	class ActionSheetAnimationController: NSObject, UIViewControllerAnimatedTransitioning {
	enum Direction {
	case enter, exit
	}

	let direction: Direction
	let duration: TimeInterval

TiagoBras / Array+GroupedBy.swift

Created April 18, 2019 11:29

Group array by key with optional sorting

	import Foundation

	extension Array {
	func groupedBy<T: Hashable>(key: (Element) -> T, sort: ((Element, Element) -> Bool)? = nil) -> [T: [Element]] {
	var groups = [T: [Element]]()

	mainLoop: for element in self {
	let elementKey = key(element)

	if groups[elementKey] == nil {

TiagoBras / UINavigationController+Popping.swift

Created April 18, 2019 11:23

Easily pop to a view controller

	import UIKit

	extension UINavigationController {

	/// Pops to the nearest view controller of type viewControllerType.
	///
	/// - Parameter viewControllerType: UIViewController.Type
	/// - Returns: true if it successfully popped to a view controller of the type passed.
	@discardableResult func popToViewController(ofType viewControllerType: UIViewController.Type) -> Bool {
	if let vc = viewControllers.last(where: { type(of: $0) == viewControllerType }) {

TiagoBras / DispatchQueue+Extensions.swift

Created April 18, 2019 11:07

DispatchQueue extension for situations where one needs to run an expensive operation in background and then use its result in the main thread

	import Foundation

	extension DispatchQueue {
	func asyncConsumeInMainQueue<T>(
	work: @escaping () throws -> T,
	mainSuccess: @escaping (T) -> Void,
	mainError: @escaping (Error) -> Void) {
	async {
	do {
	let result = try work()

TiagoBras / Date+Formatting.swift

Created April 18, 2019 11:01

How I handle different Date Formats

	import Foundation

	enum DateFormat: String {
	/// Format: yyyy-MM-dd
	case yyyyMMdd = "yyyy-MM-dd"

	/// Format: yyyy-MM-DD HH:mm
	case yyyyMMddHHmm = "yyyy-MM-DD HH:mm"

	/// Format: dd/MM/yyyy HH:mm:ss

TiagoBras / NavigationCoordinator.swift

Last active April 19, 2019 15:24

Simple Navigation Coordinator

	import UIKit

	protocol NavigationCoordinator: AnyObject {

	/// - Returns: true if it successfully completed the navigation
	@discardableResult func navigate(from source: UIViewController,
	to destination: UIViewController.Type,
	data: NavigationData?) -> Bool
	}

TiagoBras / observable.swift

Last active October 3, 2017 12:59

Observable in SWIFT

	import Foundation

	class Observable<T: Equatable> {
	typealias HandlerID = UUID

	struct Observer {
	typealias Handler = (T) -> ()

	let id: HandlerID
	let handler: Handler

TiagoBras / UIImage+Masking.swift

Created September 10, 2017 18:34

iOS - Masking a UIImage with color

	// Swift 4
	extension UIImage {
	func maskWith(color: UIColor) -> UIImage {
	UIGraphicsBeginImageContextWithOptions(size, false, 0)

	let rect = CGRect(x: 0, y: 0, width: size.width, height: size.height)

	color.setFill()

	draw(in: rect)

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