Updates for Swift 6 compatibility

- Support for Swift 6.0 and strict concurrency mode
- Removed many legacy forced-unwrapping of Optionals
- Changed PhysicsMotion's DispatchSourceTimer to regular Timer to solve concurrency crash

Author: poetmountain

CHANGELOG.md

@@ -1,3 +1,8 @@
+### 2.1.0
+- Support for Swift 6.0 and strict concurrency mode
+- Removed many legacy forced unwrappings of Optionals
+- Changed PhysicsMotion's DispatchSourceTimer to regular Timer to solve concurrency crash
+
 ### 2.0.1
 - Fixed some retain cycles that were holding on to target objects
 - Updated examples project

Examples/MotionExamples.xcodeproj/project.pbxproj

@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 46;
+	objectVersion = 54;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -228,14 +228,14 @@
 		8BB379CC1CFFA17D00A35AFD /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
+				BuildIndependentTargetsInParallel = YES;
 				LastSwiftUpdateCheck = 0730;
-				LastUpgradeCheck = 1240;
+				LastUpgradeCheck = 1610;
 				ORGANIZATIONNAME = "Poet & Mountain, LLC";
 				TargetAttributes = {
 					8BB379D31CFFA17D00A35AFD = {
 						CreatedOnToolsVersion = 7.3.1;
 						LastSwiftMigration = 0900;
-						ProvisioningStyle = Manual;
 					};
 				};
 			};
@@ -365,6 +365,7 @@
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -385,7 +386,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = "";
 			};
 			name = Debug;
 		};
@@ -424,6 +425,7 @@
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
@@ -435,9 +437,10 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
-				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = "";
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;
@@ -446,25 +449,43 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = HJVTQESL5X;
 				INFOPLIST_FILE = MotionExamples/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 15.4;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.poetmountain.MotionExamples;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
 		8BB379EA1CFFA17E00A35AFD /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = HJVTQESL5X;
 				INFOPLIST_FILE = MotionExamples/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				IPHONEOS_DEPLOYMENT_TARGET = 15.4;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
 				PRODUCT_BUNDLE_IDENTIFIER = com.poetmountain.MotionExamples;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};

Examples/MotionExamples/AppDelegate.swift

@@ -8,7 +8,7 @@
 
 import UIKit
 
-@UIApplicationMain
+@main
 class AppDelegate: UIResponder, UIApplicationDelegate {
 
     var window: UIWindow?

Examples/MotionExamples/ButtonsView.swift

@@ -8,7 +8,7 @@
 
 import UIKit
 
-protocol ButtonsViewDelegate: class {
+@MainActor protocol ButtonsViewDelegate: AnyObject {
     func didStart()
     func didStop()
     func didPause()
@@ -17,10 +17,18 @@ protocol ButtonsViewDelegate: class {
 
 public class ButtonsView: UIView {
 
-    public var startButton: UIButton!
-    public var stopButton: UIButton!
-    public var pauseButton: UIButton!
-    public var resumeButton: UIButton!
+    public var startButton: UIButton = {
+        return UIButton.init(type: .system)
+    }()
+    public var stopButton: UIButton = {
+        return UIButton.init(type: .system)
+    }()
+    public var pauseButton: UIButton = {
+        return UIButton.init(type: .system)
+    }()
+    public var resumeButton: UIButton = {
+        return UIButton.init(type: .system)
+    }()
 
     var uiCreated: Bool = false
 
@@ -44,22 +52,18 @@ public class ButtonsView: UIView {
 
     private func setupUI() {
 
-        startButton = UIButton.init(type: .system)
         startButton.setTitle("Start", for: UIControl.State())
         startButton.addTarget(self, action: #selector(start), for: .touchUpInside)
         self.addSubview(startButton)
 
-        stopButton = UIButton.init(type: .system)
         stopButton.setTitle("Stop", for: UIControl.State())
         stopButton.addTarget(self, action: #selector(stop), for: .touchUpInside)
         self.addSubview(stopButton)
 
-        pauseButton = UIButton.init(type: .system)
         pauseButton.setTitle("Pause", for: UIControl.State())
         pauseButton.addTarget(self, action: #selector(pause), for: .touchUpInside)
         self.addSubview(pauseButton)
 
-        resumeButton = UIButton.init(type: .system)
         resumeButton.setTitle("Resume", for: UIControl.State())
         resumeButton.addTarget(self, action: #selector(resume), for: .touchUpInside)
         self.addSubview(resumeButton)

Examples/MotionExamples/Classes/DynamicViewController.swift

@@ -56,14 +56,11 @@ public class DynamicViewController: UIViewController, ButtonsViewDelegate {
             motion.stop()
         }
         motions.removeAll()
-    }
-    
-    deinit {
+        
         view.removeGestureRecognizer(tapRecognizer)
     }
 
-    
-    
+
 
     // MARK: - Private methods
 
@@ -170,10 +167,6 @@ public class DynamicViewController: UIViewController, ButtonsViewDelegate {
         motion_y.additive = true
 
         let group = MotionGroup(motions: [motion_x, motion_y])
-        group.updated { [weak self] (group) in
-            guard let strong_self = self else { return }
-            //print("constraints \(strong_self.constraints)")
-        }
         group.completed { [weak self] (group) in
             guard let strong_self = self else { return }
 

Package@swift-6.0.swift

@@ -0,0 +1,47 @@
+// swift-tools-version: 6.0
+
+//  Package.swift
+//  MotionMachine
+//
+//  Created by Brett Walker on 11/12/24.
+//  Copyright © 2024 Poet & Mountain, LLC. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+import PackageDescription
+
+let package = Package(
+    name: "MotionMachine",
+    platforms: [
+        .iOS(.v13), .tvOS(.v13)
+    ],
+    products: [
+        .library(name: "MotionMachine", targets: ["MotionMachine"])
+    ],
+    targets: [
+        .target(name: "MotionMachine", path: "Sources/"),
+        .testTarget(
+            name: "MotionMachineTests",
+            dependencies: ["MotionMachine"],
+            path: "Tests/Tests/"
+        )
+    ],
+    swiftLanguageModes: [.v6]
+)

Sources/CATempo.swift

@@ -29,7 +29,7 @@ import UIKit
 /**
  *  CATempo uses a `CADisplayLink` object to send out tempo updates that are synchronized with the refresh rate of the display on iOS.
  */
-public class CATempo : Tempo {
+@MainActor public class CATempo : Tempo {
 
     /**
      *  This `CADisplayLink` object is used to provide tempo updates.
@@ -51,10 +51,10 @@ public class CATempo : Tempo {
         displayLink?.add(to: RunLoop.main, forMode: .common)
     }
 
-    deinit {
+    public override func cleanupResources() {
         displayLink?.invalidate()
+
     }
-    
 
     @objc func update() -> Void {
         let time_stamp: CFTimeInterval = self.displayLink?.timestamp ?? 0.0