StanislavK

// That’s marked @nonobjc so it won’t conflict with any of Apple’s own code, now or in the future.
@nonobjc extension UIViewController {
   func add(_ child: UIViewController, frame: CGRect? = nil) {
      addChildViewController(child)
      if let frame = frame {
         child.view.frame = frame
}
      view.addSubview(child.view)
      child.didMove(toParentViewController: self)
   }

StanislavK

extension UIView {
    func add(_ subviews: UIView...) {
        subviews.forEach(addSubview)
    }
}

view.add(button)
view.add(label)

// By dropping the "Subview" suffix from the method name, both

StanislavK

extension Encodable {
    func encode(with encoder: JSONEncoder = JSONEncoder()) throws -> Data {
        return try encoder.encode(self)
    }
}

extension Decodable {
    static func decode(with decoder: JSONDecoder = JSONDecoder(), from data: Data) throws -> Self {
        return try decoder.decode(Self.self, from: data)
    }

StanislavK

TAGS="TODO:|FIXME:|WARNING:"
ERRORTAG="ERROR:"
find "${SRCROOT}" \( -name "*.h" -or -name "*.m" -or -name "*.swift" \) -print0 | xargs -0 egrep --with-filename --line-number --only-matching "($TAGS).*\$|($ERRORTAG).*\$" | perl -p -e "s/($TAGS)/ warning: \$1/"| perl -p -e "s/($ERRORTAG)/ error: \$1/"

StanislavK

import UIKit
import CoreImage

class ImagePainter {
  
  let context = CIContext(options:[kCIImageColorSpace: NSNull()])
  
  let filter = CIFilter(name: "CIFalseColor",
                        withInputParameters: ["inputColor1" : CIColor(color: .black)])
  

StanislavK

import UIKit

extension UIView {
    func pinEdgesToSafeArea(of view: UIView) {
        self.translatesAutoresizingMaskIntoConstraints = false
        self.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
        self.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
        self.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
        self.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
    }

StanislavK

public extension UITableView {
    
    public func setAutomaticRowHeight() {
        estimatedRowHeight = UITableViewAutomaticDimension
        rowHeight = UITableViewAutomaticDimension
    }
}

StanislavK

extension String {
    var first: String {
        return String(characters.prefix(1))
    }
    var last: String {
        return String(characters.suffix(1))
    }
    var uppercaseFirst: String {
        return first.uppercased() + String(characters.dropFirst())
    }

StanislavK

import UIKit

extension UITableView {
    
    func register<T: UITableViewCell>(_: T.Type) {
        
        let nib = UINib(nibName: T.nibName, bundle: nil)
        register(nib, forCellReuseIdentifier: T.reuseIdentifier)
    }
    

StanislavK

import UIKit

protocol NibLoadableView: class { }

extension NibLoadableView {
    
    static var nibName: String {
        return String(describing: self)
    }