Set SWIFT_STRICT_CONCURRENCY to complete in EssentialFeediOS and fix all warnings

Author: caiozullo

EssentialFeed/EssentialFeed.xcodeproj/project.pbxproj

@@ -1761,7 +1761,10 @@
 				SUPPORTS_MACCATALYST = NO;
 				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
+				SWIFT_APPROACHABLE_CONCURRENCY = YES;
+				SWIFT_DEFAULT_ACTOR_ISOLATION = MainActor;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 1;
 			};
@@ -1795,6 +1798,9 @@
 				SUPPORTS_MACCATALYST = NO;
 				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
+				SWIFT_APPROACHABLE_CONCURRENCY = YES;
+				SWIFT_DEFAULT_ACTOR_ISOLATION = MainActor;
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 1;
 				VALIDATE_PRODUCT = YES;
@@ -1821,7 +1827,9 @@
 				SUPPORTS_MACCATALYST = NO;
 				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
+				SWIFT_APPROACHABLE_CONCURRENCY = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 1;
 			};
@@ -1847,6 +1855,8 @@
 				SUPPORTS_MACCATALYST = NO;
 				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
+				SWIFT_APPROACHABLE_CONCURRENCY = YES;
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 1;
 				VALIDATE_PRODUCT = YES;

EssentialFeed/EssentialFeediOS/Feed UI/Controllers/LoadMoreCellController.swift

@@ -27,9 +27,11 @@ public class LoadMoreCellController: NSObject, UITableViewDataSource, UITableVie
 		reloadIfNeeded()
 
 		offsetObserver = tableView.observe(\.contentOffset, options: .new) { [weak self] (tableView, _) in
-			guard tableView.isDragging else { return }
-			
-			self?.reloadIfNeeded()
+			MainActor.assumeIsolated {
+				guard tableView.isDragging else { return }
+				
+				self?.reloadIfNeeded()
+			}
 		}
 	}
 

EssentialFeed/EssentialFeediOS/Feed UI/Views/Helpers/UIView+Shimmering.swift

@@ -30,6 +30,10 @@ extension UIView {
 	private class ShimmeringLayer: CAGradientLayer {
 		private var observer: Any?
 
+		nonisolated override init() { super.init() }
+		nonisolated override init(layer: Any) { super.init(layer: layer) }
+		nonisolated required init?(coder: NSCoder) { super.init(coder: coder) }
+		
 		convenience init(size: CGSize) {
 			self.init()
 
@@ -49,7 +53,7 @@ extension UIView {
 			animation.repeatCount = .infinity
 			add(animation, forKey: "shimmer")
 
-			observer = NotificationCenter.default.addObserver(forName: UIApplication.willEnterForegroundNotification, object: nil, queue: nil) { [weak self] _ in
+			observer = NotificationCenter.default.addObserver(of: UIApplication.shared, for: .willEnterForeground) { [weak self] _ in
 				self?.add(animation, forKey: "shimmer")
 			}
 		}

EssentialFeed/EssentialFeediOS/Shared UI/Controllers/CellController.swift

@@ -5,27 +5,28 @@
 import UIKit
 
 public struct CellController {
-	let id: AnyHashable
+	let id: any Hashable & Sendable
 	let dataSource: UITableViewDataSource
 	let delegate: UITableViewDelegate?
 	let dataSourcePrefetching: UITableViewDataSourcePrefetching?
 
-	public init(id: AnyHashable, _ dataSource: UITableViewDataSource) {
+	public init(id: any Hashable & Sendable, _ dataSource: UITableViewDataSource) {
 		self.id = id
 		self.dataSource = dataSource
 		self.delegate = dataSource as? UITableViewDelegate
 		self.dataSourcePrefetching = dataSource as? UITableViewDataSourcePrefetching
 	}
 }
 
-extension CellController: Equatable {
-	public static func == (lhs: CellController, rhs: CellController) -> Bool {
-		lhs.id == rhs.id
+extension CellController: nonisolated Equatable {
+	public nonisolated static func == (lhs: CellController, rhs: CellController) -> Bool {
+		AnyHashable(lhs.id) == AnyHashable(rhs.id)
 	}
 }
 
-extension CellController: Hashable {
-	public func hash(into hasher: inout Hasher) {
+extension CellController: nonisolated Hashable {
+	public nonisolated func hash(into hasher: inout Hasher) {
+		let id = AnyHashable(self.id)
 		hasher.combine(id)
 	}
 }