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Unofficial APOD utilizes Alamofire to request data from NASA's APOD servers. The response data is returned in JSON format. Unofficial APOD utilizes structs conforming to Swift's Codable protocol to parse the JSON returns and persists the data in Core Data. Prior to requesting information from NASA's servers, Unofficial APOD first checks to see if it has already retrieved the data before making a network request.

NASA returns a JSON with text data about the image, but no binary data is returned. Unofficial APOD utilizes AlamofireImage to download the most recent 60 days' worth of non-copywritten images on a background thread and persists them locally to speed up performance for the user.

Copywritten images are not stored on the device. So the user doesn't see an empty screen, the UICircularProgressRing framework is configured to display the status of the image download.

Giv

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Set Zoom Scale on Map Region in Swift

MKCoordinateRegionMakeWithDistance can be used to make a region with a specified distance (in meters).

Here is the method signature:

func MKCoordinateRegionMakeWithDistance(_ centerCoordinate: CLLocationCoordinate2D, 
                                        _ latitudinalMeters: CLLocationDistance, 
                                        _ longitudinalMeters: CLLocationDistance) -> MKCoordinateRegion

Use an extension to get your desired distance and convert it into meters.

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extension Double {
  func convert(from originalUnit: UnitLength, to convertedUnit: UnitLength) -> Double {
    return Measurement(value: self, unit: originalUnit).converted(to: convertedUnit).value
  }
}

/*
let miles = 26.2
let meters = miles.convert(from: .miles, to: .meters)
*/

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//
//  ConnectivityUtility.swift
//
//  Created by Adrian Bolinger on 7/10/18.
//  Copyright © 2018 Adrian Bolinger. All rights reserved.
//

import UIKit
import Reachability

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New in Swift 4.2

Summary from HackingWithSwift.com

CaseIterable

The CaseIterable protocol provides an allCases method that turns all of your cases into an array.

enum Pasta: String, CaseIterable {

case canneloni = "Cannelloni pasta"

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import UIKit

    /*
        This is a high-level physics for poets sketch of an implementation for
        sending and receiving messages. YOU'LL NEED TO REFINE IT.

        If you want to implment encryption, I'd use a framework like CryptoKit,
        or some well-known, public framework w/ a lotta stars, recent commits,
        and not a lot of issues on the GitHub page.

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Issues

CocoaPod Bloat

• There's a ton of CocoaPods in the project. Do you need them all?
  • I see two types of cocoapods for image caching

Lack of Tests

• there are only tests for one class and they don't pass
• I should be able to download the repo, install the cocoapods and run the tests and they should all pass without having to jump through special hoops.me.com

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Review

S3 and IAM Summary

• IAM consists of the following
  • Users
  • Groups
  • Roles
  • Policies
    • Policies are in a JSON file

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//
//  TwoHandledSlider.swift
//  CombineQuake
//
//  Created by Adrian Bolinger on 4/17/21.
//

import SwiftUI

struct TwoHandledSliderView: View {

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Passing the AWS Certified Solutions Architect Associate Exam

Getting Started

Q: How do you eat an elephant?

A: One bite at a time.

Learning the Cloud Practitioner Material