dabrahams

/// Classes whose initializers actually create derived classes
protocol FactoryInitializable {
  /// The type of the least-derived class declared to be FactoryInitializable.
  ///
  /// - Warning: Do not define this in your FactoryInitializable type!
  associatedtype FactoryBase: AnyObject, FactoryInitializable = Self
  // This associatedtype is a trick that captures `Self` at the point where
  // `FactoryInitializable` enters a class hierarchy; in other contexts, `Self`
  // refers to the most-derived type.
}

romanmiller

// from: size that button start animated; duration: time for animation;   
 func animateSpring(from: CGFloat,duration: TimeInterval) {
        
        let scale = from / self.bounds.height
        self.transform = CGAffineTransform(scaleX: scale, y: scale)
        
        UIView.animate(withDuration: duration,
                       delay: 0,
                       usingSpringWithDamping: 0.6,
                       initialSpringVelocity: 0.4,

trilliwon

// Swift4
let image = UIImage(named: "sample")
let data = image?.pngData()
let data = image?.jpegData(compressionQuality: 0.9)
let uiImage: UIImage = UIImage(data: imageData)

// deprecated
// var imageData: Data = UIImagePNGRepresentation(image)

AmitaiB

precedencegroup BooleanPrecedence { associativity: left }
infix operator ^^ : BooleanPrecedence
/**
 Swift Logical XOR operator
 ```
 true  ^^ true   // false
 true  ^^ false  // true
 false ^^ true   // true
 false ^^ false  // false
 ```

anhar

Setting up iOS Universal Links

Table of Contents

• Resources
  • General link resources
  • Validation tools
• Server configuration
  • Apple JSON Metadata file
• Create a JSON file called apple-app-association

alonecuzzo

//
//  ViewController.swift
//  SnapKitTest
//
//  Created by Robert Payne on 10/11/15.
//  Copyright © 2015 Zwopple Limited. All rights reserved.
//

import SnapKit
import UIKit

benjaminhorner

func keyboardWillShow(notification: NSNotification) {
        if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
            let contentInsets = UIEdgeInsets(top: self.tableView.contentInset.top, left: 0, bottom: keyboardSize.height, right: 0)
            self.tableView.contentInset = contentInsets
            
            // If active text field is hidden by keyboard, scroll it so it's visible
            // Your app might not need or want this behavior.
            var aRect: CGRect = self.view.frame
            aRect.size.height -= keyboardSize.height
            let activeTextFieldRect: CGRect?