iOS app with basic list view

Author: tib

Chapter 14/MyProjectApi/Sources/MyProjectApi/Api.swift

@@ -77,3 +77,4 @@ public struct BlogPostPatchObject: Codable {
         self.categoryId = categoryId
     }
 }
+

Chapter 14/MyProjectApi/Sources/MyProjectApi/Blog/BlogPostObjects.swift

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "Default.jpg",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Chapter 14/MyProjectClient/iOS/Assets/Assets.xcassets/Default.imageset/Contents.json

@@ -56,5 +56,10 @@
 		<string>UIInterfaceOrientationLandscapeLeft</string>
 		<string>UIInterfaceOrientationLandscapeRight</string>
 	</array>
+	<key>NSAppTransportSecurity</key>
+	<dict>
+		<key>NSAllowsArbitraryLoads</key>
+		<true/>
+	</dict>
 </dict>
 </plist>

Chapter 14/MyProjectClient/iOS/Assets/Assets.xcassets/Default.imageset/Default.jpg

@@ -29,28 +29,33 @@ class CustomCell: UITableViewCell {
         coverView.translatesAutoresizingMaskIntoConstraints = false
         self.contentView.addSubview(coverView)
         self.coverView = coverView
+        self.coverView.contentMode = .scaleAspectFill
+        self.coverView.clipsToBounds = true
+        self.coverView.layer.cornerRadius = 8
 
         let titleLabel = UILabel(frame: .zero)
         titleLabel.translatesAutoresizingMaskIntoConstraints = false
         self.contentView.addSubview(titleLabel)
         self.titleLabel = titleLabel
+        self.titleLabel.textAlignment = .center
 
         NSLayoutConstraint.activate([
-            self.contentView.topAnchor.constraint(equalTo: self.coverView.topAnchor),
-            self.contentView.bottomAnchor.constraint(equalTo: self.coverView.bottomAnchor),
-            self.contentView.leadingAnchor.constraint(equalTo: self.coverView.leadingAnchor),
-            self.contentView.trailingAnchor.constraint(equalTo: self.coverView.trailingAnchor),
-
-            self.contentView.centerXAnchor.constraint(equalTo: self.titleLabel.centerXAnchor),
-            self.contentView.centerYAnchor.constraint(equalTo: self.titleLabel.centerYAnchor),
+            self.coverView.topAnchor.constraint(equalTo: self.contentView.topAnchor, constant: 16),
+            self.coverView.leadingAnchor.constraint(equalTo: self.contentView.leadingAnchor, constant: 16),
+            self.coverView.trailingAnchor.constraint(equalTo: self.contentView.trailingAnchor, constant: -16),
+            self.coverView.bottomAnchor.constraint(equalTo: self.titleLabel.topAnchor, constant: 0),
+            
+            self.titleLabel.leadingAnchor.constraint(equalTo: self.contentView.leadingAnchor, constant: 16),
+            self.titleLabel.trailingAnchor.constraint(equalTo: self.contentView.trailingAnchor, constant: -16),
+            self.titleLabel.bottomAnchor.constraint(equalTo: self.contentView.bottomAnchor, constant: 0),
+            self.titleLabel.heightAnchor.constraint(equalToConstant: 44),
         ])
-
-        self.titleLabel.font = UIFont.systemFont(ofSize: 64)
     }
 
     override func prepareForReuse() {
         super.prepareForReuse()
 
+        self.titleLabel.text = nil
         self.coverView.image = nil
     }
 }

Chapter 14/MyProjectClient/iOS/Assets/Info.plist

@@ -0,0 +1,43 @@
+//
+//  URLSession+DowloadTaskPublisher.swift
+//  MyProject
+//
+//  Created by Tibor Bodecs on 2020. 05. 17..
+//  Copyright © 2020. Tibor Bodecs. All rights reserved.
+//
+
+import Foundation
+import Combine
+
+extension URLSession {
+
+    public func downloadTaskPublisher(for url: URL) -> URLSession.DownloadTaskPublisher {
+        self.downloadTaskPublisher(for: .init(url: url))
+    }
+
+    public func downloadTaskPublisher(for request: URLRequest) -> URLSession.DownloadTaskPublisher {
+        .init(request: request, session: self)
+    }
+
+    public struct DownloadTaskPublisher: Publisher {
+
+        public typealias Output = (url: URL, response: URLResponse)
+        public typealias Failure = URLError
+
+        public let request: URLRequest
+        public let session: URLSession
+
+        public init(request: URLRequest, session: URLSession) {
+            self.request = request
+            self.session = session
+        }
+
+        public func receive<S>(subscriber: S) where S: Subscriber,
+            DownloadTaskPublisher.Failure == S.Failure,
+            DownloadTaskPublisher.Output == S.Input
+        {
+            let subscription = DownloadTaskSubscription(subscriber: subscriber, session: self.session, request: self.request)
+            subscriber.receive(subscription: subscription)
+        }
+    }
+}

Chapter 14/MyProjectClient/iOS/Sources/App/Cells/CustomCell.swift

@@ -0,0 +1,64 @@
+//
+//  URLSession+DownloadTaskSubscription.swift
+//  MyProject
+//
+//  Created by Tibor Bodecs on 2020. 05. 17..
+//  Copyright © 2020. Tibor Bodecs. All rights reserved.
+//
+
+import Foundation
+import Combine
+
+extension URLSession {
+
+    final class DownloadTaskSubscription<SubscriberType: Subscriber>: Subscription where
+        SubscriberType.Input == (url: URL, response: URLResponse),
+        SubscriberType.Failure == URLError
+    {
+        private var subscriber: SubscriberType?
+        private weak var session: URLSession!
+        private var request: URLRequest!
+        private var task: URLSessionDownloadTask!
+
+        init(subscriber: SubscriberType, session: URLSession, request: URLRequest) {
+            self.subscriber = subscriber
+            self.session = session
+            self.request = request
+        }
+
+        func request(_ demand: Subscribers.Demand) {
+            guard demand > 0 else {
+                return
+            }
+            self.task = self.session.downloadTask(with: request) { [weak self] url, response, error in
+                if let error = error as? URLError {
+                    self?.subscriber?.receive(completion: .failure(error))
+                    return
+                }
+                guard let response = response else {
+                    self?.subscriber?.receive(completion: .failure(URLError(.badServerResponse)))
+                    return
+                }
+                guard let url = url else {
+                    self?.subscriber?.receive(completion: .failure(URLError(.badURL)))
+                    return
+                }
+                do {
+                    let cacheDir = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first!
+                    let fileUrl = cacheDir.appendingPathComponent((UUID().uuidString))
+                    try FileManager.default.moveItem(atPath: url.path, toPath: fileUrl.path)
+                    _ = self?.subscriber?.receive((url: fileUrl, response: response))
+                    self?.subscriber?.receive(completion: .finished)
+                }
+                catch {
+                    self?.subscriber?.receive(completion: .failure(URLError(.cannotCreateFile)))
+                }
+            }
+            self.task.resume()
+        }
+
+        func cancel() {
+            self.task.cancel()
+        }
+    }
+}

Chapter 14/MyProjectClient/iOS/Sources/App/Cells/MyCell.swift

@@ -0,0 +1,21 @@
+//
+//  RootEntity.swift
+//  MyProject
+//
+//  Created by Tibor Bodecs on 2020. 05. 16..
+//  Copyright © 2020. Tibor Bodecs. All rights reserved.
+//
+
+import Foundation
+
+struct RootEntity {
+
+    struct Item {
+        let id: UUID
+        let title: String
+        let imageUrl: String
+        let url: String
+    }
+
+    let items: [Item]
+}