regnerjr

100 Days of Swift UI my notes and tracking my progress

• Day 1
  • Oh yeah you can use _ as a number separator in Int's
  • Some easy getting started stuff about var vs. let Double Int Bool String and multi line string declarations
  • You can use mulit line string even when you dont want mulit line output by escaping the newlines.
• Day 2
  • Tuples are fixed in size and fixed in type once you create them let tup = ("one", 1) will always be of type (String, Int) you can not change the type of either of the items or add more to the beginning or end.
• Syntax for adding a default when doing a dictionary lookup let value = mydict["key", default: 3] wonder why this syntax exists? How is it different from let value = mydict["missing_key"] ?? 3

regnerjr

import UIKit

private func delegateClassName() -> String? {
    guard NSClassFromString("TestBundleName.TestingAppDelegate") == nil else {
        // when running fast tests, use a nil AppDelegate
        return nil
    }
    return NSStringFromClass(AppDelegate.self)
}

regnerjr

+#if DEBUG
 +extension UIView {
 +    @available(*, deprecated, message: "This warning is here so you don't ship this code")
 +    @objc func exerciseAmbiguityInLayoutRepeatedly() {
 +        if self.hasAmbiguousLayout {
 +            Timer.scheduledTimer(timeInterval: 0.5,
 +                                 target: self,
 +                                 selector: #selector(UIView.exerciseAmbiguityInLayout),
 +                                 userInfo: nil,
 +                                 repeats: true)

regnerjr

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regnerjr

swift test 2>&1 | xcpretty -t

# Thanks to Keith Smiley
# https://twitter.com/SmileyKeith/status/949865525374418944

regnerjr

class LoadingVC: UIViewController {

    lazy var loadingIndicator: UIActivityIndicatorView = {
        let loading = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.gray)
        return loading
    }()

    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .white

regnerjr

extension UIView {
    func exerciseAmbiguityInLayoutRepeatedly(_ recursive: Bool) {
        #if DEBUG
            if hasAmbiguousLayout {
                Timer.scheduledTimer(timeInterval: 0.5,
                                     target: self,
                                     selector: #selector(exerciseAmbiguityInLayout),
                                     userInfo: nil,
                                     repeats: true)
            }

regnerjr

// (Int, Int) -> Int
func add(num1: Int, num2: Int) -> Int {
    return num1 + num2
}

// increment just adds to any other number
let curried: (Int) -> ((Int) -> Int) = { num in
    return { num2 in
        return add(num1: num, num2: num2)
    }

regnerjr

import UIKit

class PossibleView: UIView {

    let header: UILabel = {
        let label = UILabel(frame: .zero)
        label.translatesAutoresizingMaskIntoConstraints = false
        label.backgroundColor = .brown
        label.numberOfLines = 0

regnerjr

{
    "header": {
        "Name": "MDErgo1",
        "Layout": "Default",
        "Base": "Blank",
        "Version": "0.1",
        "Author": "HaaTa (Jacob Alexander) 2015",
        "KLL": "0.3c",
        "Date": "2015-09-12",
        "Generator": "KIICONF 0.2"