isoiphone

// This should not be difficult, but it is.
// If you miss the `isBeingPresented` check it breaks.
// it will force the portrait only viewcontroller into landscape (an unsupported orientation!) during dismiss

import UIKit

class ViewController: UIViewController {
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        .portrait
    }

isoiphone

struct WeakEnum<Enum: RawRepresentable>: Codable where Enum: Codable & Equatable, Enum.RawValue: Codable {
    let rawValue: Enum.RawValue
    let value: Enum?
    
    init(rawValue: Enum.RawValue) {
        self.rawValue = rawValue
        self.value = Enum.init(rawValue: rawValue)
    }
    

isoiphone

class ImpactFeedbackGenerator {
    fileprivate init() {
    }
    
    static func create() -> ImpactFeedbackGenerator {
        if #available(iOS 10.0, *) {
            return ConcreteImpactFeedbackGenerator()
        } else {
            return ImpactFeedbackGenerator()
        }

isoiphone

isoiphone

class OneBigSwitchExample {
    enum Type { case First, Second }
    
    var magic: String = ""
    var cool: String = ""
    var fast: Bool = false
    
    func foo(type: Type) {
        switch type {
        case .First:

isoiphone

// so smoooooth.
func smoothstep(x: CGFloat) -> CGFloat {
    return x*x*(3-2*x)
}

isoiphone

class ReadableContentGuideHelperView: UIView {
    var onChange: ((CGRect)->())?
    
    static func addToView(view: UIView) -> ReadableContentGuideHelperView {
        let helperView = ReadableContentGuideHelperView()
        view.addSubview(helperView)
        
        if #available(iOS 9.0, *) {
            helperView.setupAnchors(view)
        } else {

isoiphone

import CoreImage

extension UIImage {
    func rectsForFaces() -> [CGRect] {
        guard let cgImage = CGImage else { return [] }
        let ciImage = CoreImage.CIImage(CGImage: cgImage)
        
        let options = [CIDetectorAccuracy: CIDetectorAccuracyHigh]
        let detector = CIDetector(ofType: CIDetectorTypeFace, context: nil, options: options)
        let hallOfFaces = detector.featuresInImage(ciImage)

isoiphone

extension UIImage {
    class func imageWithColor(color: UIColor, size: CGSize=CGSize(width: 1, height: 1)) -> UIImage {
        UIGraphicsBeginImageContextWithOptions(size, false, 0)
        color.setFill()
        UIRectFill(CGRect(origin: CGPoint.zero, size: size))
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }
}

isoiphone

extension UIView {
    func forEachSubviewOfType<V: UIView>(type: V.Type, @noescape apply block: V -> Void) {
        for view in subviews {
            if let view = view as? V {
                block(view)
            } else {
                view.forEachSubviewOfType(V.self, apply: block)
            }
        }
    }