krummler

import Foundation

extension UnicodeScalar {
    /// Note: This method is part of Swift 5, so you can omit this. 
    /// See: https://developer.apple.com/documentation/swift/unicode/scalar
    var isEmoji: Bool {
        switch value {
        case 0x1F600...0x1F64F, // Emoticons
             0x1F300...0x1F5FF, // Misc Symbols and Pictographs
             0x1F680...0x1F6FF, // Transport and Map

krummler

import Foundation

extension Character {
    /// A simple emoji is one scalar and presented to the user as an Emoji
    var isSimpleEmoji: Bool {
        return unicodeScalars.count == 1 && unicodeScalars.first?.properties.isEmojiPresentation ?? false
    }

    /// Checks if the scalars will be merged into and emoji
    var isCombinedIntoEmoji: Bool {

krummler

//: A UIKit based Playground for presenting user interface

import PlaygroundSupport
import UIKit

class MyViewController: UIViewController {
    let button1 = UIButton()
    let button2 = UIButton()
    let button3 = UIButton()
    let button4 = UIButton()

krummler

button.backgroundColor = UIColor(named: "buttonBackground")
button.layer.cornerRadius = 8
button.layer.shadowColor = UIColor(named: "buttonShadow")?.cgColor
button.layer.shadowOpacity = 0.8
button.layer.shadowOffset = CGSize(width: 1, height: 1)
button.layer.borderWidth = 2
button.layer.borderColor = UIColor(named: "buttonBorder")?.cgColor

krummler

extension UIFont {
    func with(style: UIFont.TextStyle, basePointSize: CGFloat, maxPointSize: CGFloat? = nil) -> UIFont {
        if let maxPointSize = maxPointSize {
            return UIFontMetrics(forTextStyle: style).scaledFont(for: self.withSize(basePointSize),
                                                                 maximumPointSize: maxPointSize)
        }
        return UIFontMetrics(forTextStyle: style).scaledFont(for: self.withSize(basePointSize))
    }
}

krummler

struct FontStyles {
    private static let customFont = UIFont(name: "Cochin", size: 15)!

    static let headline = customFont.with(style: .headline, basePointSize: 34)
    static let body = customFont.with(style: .body, basePointSize: UIFont.labelFontSize)
    static let bigTime = customFont.withSize(66)

    static let buttonPrimary = customFont.with(style: .body, basePointSize: UIFont.buttonFontSize)
    static let buttonSecondary = customFont.with(style: .caption1, basePointSize: UIFont.smallSystemFontSize)
}

krummler

timeLabel.font = FontStyles.bigTime
timeLabel.adjustsFontForContentSizeCategory = false

krummler

let label = UILabel()
label.font = UIFont.preferredFont(forTextStyle: .caption1)
label.adjustsFontForContentSizeCategory = true

krummler

stackView.axis = traitCollection.preferredContentSizeCategory > .extraExtraExtraLarge ? .vertical : .horizontal

krummler

override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
   stack.axis = traitCollection.preferredContentSizeCategory > .extraExtraExtraLarge ? .vertical : .horizontal
}