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override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()
    contentViewHeight.constant = view.bounds.height > 504 ? view.bounds.height : 504
}

alexbaramilis

struct API1 {
    static let BaseURL = "api.airvisual.com/v2/nearest_city?lat={{LATITUDE}}&lon={{LONGITUDE}}&key={{YOUR_API_KEY}}"
    static let Key = "your_api_key"
}

enum API2 {
    static let BaseURL = "api.airvisual.com/v2/nearest_city?lat={{LATITUDE}}&lon={{LONGITUDE}}&key={{YOUR_API_KEY}}"
    static let Key = "your_api_key"
}

alexbaramilis

enum API {
    enum AirVisual {
        static let BaseURL = "api.airvisual.com/v2/nearest_city?lat={{LATITUDE}}&lon={{LONGITUDE}}&key={{YOUR_API_KEY}}"
        static let Key = "you_api_key"
    }
    enum PropellerAir {
        static let BaseURL = "https://open.propellerhealth.com/prod/forecast?latitude={{LATITUDE}}&longitude={{LONGITUDE}}"
    }
}

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@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    
    func applicationDidFinishLaunching(_ application: UIApplication) {
        if let navigationController = window?.rootViewController as? UINavigationController,
            let breatherViewController = navigationController.topViewController as? BreatherViewController {
                // Property and initialiser injection in one line
                breatherViewController.dataSource = BreatherDataSource(with: NetworkClient())
        }

alexbaramilis

import UIKit
import PlaygroundSupport
import RxSwift
import RxCocoa

let signUpButton = UIButton()
signUpButton.setTitle("Tap me!", for: .normal)
signUpButton.sizeToFit()

let didTapSignUp = PublishSubject<Void>()

alexbaramilis

import Foundation

extension String {
    /// Returns the indices of all the numbers in the string.
    ///
    /// If a number is directly preceded by a dot/comma, the index of the dot/comma
    /// will also be returned.
    /// This accounts for potential numbers with decimal or thousands separators.
    var indicesOfNumbers: [Int] {
        var indices = [Int]()

alexbaramilis

import UIKit

extension UILabel {
    /// Sets the attributedText property of UILabel with an attributed string
    /// that displays the characters of the text at the given indices in subscript.
    func setAttributedTextWithSubscripts(text: String, indicesOfSubscripts: [Int]) {
        let font = self.font!
        let subscriptFont = font.withSize(font.pointSize * 0.7)
        let subscriptOffset = -font.pointSize * 0.3
        let attributedString = NSMutableAttributedString(string: text,

alexbaramilis

struct CityConditions {
    let city: String
    let weather: Weather
    let pollution: Pollution
    let asthma: Asthma
}

struct Weather {
    let timestamp: String // timestamp: ex. "2018-12-04T18:00:00.000Z" (ISO 8601) (Z stands for UTC)
    let iconCode: String // weather icon code: ex. "10n"

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extension CityConditions {
    static func sampleData() -> CityConditions {
        let weather = Weather(timestamp: "2019-04-16T11:00:00.000Z",
                              iconCode: "01d",
                              temperature: 5,
                              humidity: 36,
                              pressure: 1015,
                              windSpeed: 9.8,
                              windDirection: 300)
        let pollution = Pollution(timestamp: "2019-04-16T08:00:00.000Z",

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// MARK: - Properties

private let data = CityConditions.sampleData()

// MARK: - Actions

@IBAction func aqiStandardSegmentedControlValueChanged(_ sender: UISegmentedControl) {
    updateAirQualityUI()
}