MaherKSantina

public typealias ConstraintsConfiguration = (_ top: NSLayoutConstraint, _ left: NSLayoutConstraint, _ bottom: NSLayoutConstraint, _ right: NSLayoutConstraint) -> Void

extension UIView {
    /**
     Embeds a subview inside the current view and adds constraints to fit the subview in the whole view. An optional constraints configuration closure can be specified to do extra customization for the added constraints, or you can keep a reference for the added constraints in this closure.
     - Parameter subview: The subview that will be added
     - Parameter constraintsConfiguration: The constraint configuration that will be applied to the newly added constraints
     */
    public func addSubviewWithConstraints(_ subview: UIView, constraintsConfiguration: ConstraintsConfiguration? = nil) {
        // Required to disable auto generation of constraints

MaherKSantina

extension Optional {
    
    /**
     Unwraps a value or returns the default value provided if it's nil
     - parameter defaultValue: The default value that will be returned if the original value is nil
     */
    func unwrap(defaultValue: Wrapped) -> Wrapped {
        guard let self = self else {
            
            // Make the app crash in debug but not in production

MaherKSantina

post_install do |installer|
    installer.pods_project.targets.each do |target|
        if ['RxSwift', 'RxCocoa', 'RxAlamofire', 'RxTest', 'RxBlocking'].include? target.name
            target.build_configurations.each do |config|
                config.build_settings['SWIFT_VERSION'] = '3.3'
            end
        end
    end
end

MaherKSantina

class ListingView: UIView {
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        initView()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        initView()

MaherKSantina

// Step 1
guard let xibItems = Bundle.main.loadNibNamed("ListingView", owner: self, options: nil), let firstXibView = xibItems[0] as? UIView else {
    fatalError("Xib is empty or first view is not a UIView")
}
// Step 2
firstXibView.translatesAutoresizingMaskIntoConstraints = false

// Step 3
let viewConstraints = [NSLayoutAttribute.top, NSLayoutAttribute.left, NSLayoutAttribute.bottom, NSLayoutAttribute.right].map { (attribute) -> NSLayoutConstraint in
    return NSLayoutConstraint(item: firstXibView, attribute: attribute, relatedBy: .equal, toItem: self, attribute: attribute, multiplier: 1, constant: 0)

MaherKSantina

class ListingView: UIView {
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        initView()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        initView()

MaherKSantina

import UIKit
import MSAutoView

class ListingView: MSAutoView { }

MaherKSantina

public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
    return cellSpacing
}

MaherKSantina

public func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
    let target = targetContentOffset.pointee
    //Current scroll distance is the distance between where the user tapped and the destination for the scrolling (If the velocity is high, this might be of big magnitude)
    let currentScrollDistance = target.x - currentScrollOffset.x
    //Make the value an integer between -1 and 1 (Because we don't want to scroll more than one item at a time)
    let coefficent = Int(max(-1, min(currentScrollDistance/scrollThreshold, 1)))
    let currentIndex = Int(round(currentScrollOffset.x/itemWidth))
    let adjacentItemIndex = currentIndex + coefficent
    let adjacentItemIndexFloat = CGFloat(adjacentItemIndex)
    let adjacentItemOffsetX = adjacentItemIndexFloat * (itemWidth(scrollView) + cellSpacing)

MaherKSantina

public func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
    currentScrollOffset = scrollView.contentOffset
}