Update for Xcode 15 and also fix an assertion due to zero size (#60)

* Update the readme

* Make the project build in Xcode 15 by bumping min target and adding a version for the demo

* Don't redraw if the image size is zero to avoid an assertion

https://developer.apple.com/forums/thread/733326

Demo/Podfile.lock

@@ -9,8 +9,8 @@ EXTERNAL SOURCES:
     :path: "../"
 
 SPEC CHECKSUMS:
-  TouchDraw: 02074f86f08957eceb8ee3012b6b8740405e6109
+  TouchDraw: ceed566f08865e4c7e41a338659117224788a95b
 
 PODFILE CHECKSUM: f850bd72d12b5fb4f18cad822d3a3481b9ad2931
 
-COCOAPODS: 1.5.3
+COCOAPODS: 1.12.1

Demo/TouchDrawDemo.xcodeproj/project.pbxproj

@@ -152,6 +152,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 				Base,
 			);
@@ -204,7 +205,7 @@
 			files = (
 			);
 			inputPaths = (
-				"${SRCROOT}/Pods/Target Support Files/Pods-TouchDrawDemo/Pods-TouchDrawDemo-frameworks.sh",
+				"${PODS_ROOT}/Target Support Files/Pods-TouchDrawDemo/Pods-TouchDrawDemo-frameworks.sh",
 				"${BUILT_PRODUCTS_DIR}/TouchDraw/TouchDraw.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
@@ -213,7 +214,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-TouchDrawDemo/Pods-TouchDrawDemo-frameworks.sh\"\n";
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-TouchDrawDemo/Pods-TouchDrawDemo-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
 /* End PBXShellScriptBuildPhase section */
@@ -296,7 +297,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.1;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
@@ -343,7 +344,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.1;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
@@ -357,7 +358,10 @@
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = "$(inherited)";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CURRENT_PROJECT_VERSION = 1;
 				INFOPLIST_FILE = TouchDrawDemo/Info.plist;
+				INFOPLIST_KEY_CFBundleDisplayName = "TouchDraw Demo";
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				MARKETING_VERSION = 1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = io.dehli.touchdraw;
@@ -373,7 +377,10 @@
 			buildSettings = {
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = "$(inherited)";
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CURRENT_PROJECT_VERSION = 1;
 				INFOPLIST_FILE = TouchDrawDemo/Info.plist;
+				INFOPLIST_KEY_CFBundleDisplayName = "TouchDraw Demo";
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				MARKETING_VERSION = 1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = io.dehli.touchdraw;

Demo/TouchDrawDemo/Info.plist

@@ -14,6 +14,8 @@
 	<string>$(PRODUCT_NAME)</string>
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>

Sources/TouchDrawView.swift

@@ -290,6 +290,7 @@ fileprivate extension TouchDrawView {
 
     /// Clears view, then draws stack
     func redrawStack() {
+        if imageView.frame.size == .zero { return }
         beginImageContext()
         image?.draw(in: imageView.bounds)
         for stroke in stack {

TouchDraw.podspec

@@ -35,7 +35,7 @@ Pod::Spec.new do |s|
   s.social_media_url      = "http://twitter.com/cpdehli"
 
   s.platform              = :ios
-  s.ios.deployment_target = "8.0"
+  s.ios.deployment_target = "12.0"
 
   s.source                = { :git => "https://github.com/dehli/TouchDraw.git", :tag => "#{s.version}"}
   s.source_files          = "Sources/**/*.{swift}"

TouchDraw.xcodeproj/project.pbxproj

@@ -178,6 +178,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 			);
 			mainGroup = 89F60F611BC9580000BCDD93;
@@ -387,7 +388,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = TouchDraw/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = io.dehli.TouchDraw;
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -409,7 +410,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				INFOPLIST_FILE = TouchDraw/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = io.dehli.TouchDraw;
 				PRODUCT_NAME = "$(TARGET_NAME)";