fix iOS 12 crashes

GDPerformanceView-Swift.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "GDPerformanceView-Swift"
-  s.version      = "2.1.0"
+  s.version      = "2.1.1"
   s.summary      = "Shows FPS, CPU and memory usage, device model, app and iOS versions above the status bar and report FPS, CPU and memory usage via delegate."
   s.homepage     = "https://github.com/dani-gavrilov/GDPerformanceView-Swift"
   s.license      = { :type => "MIT", :file => "LICENSE" }

GDPerformanceView-Swift.xcodeproj/project.pbxproj

@@ -21,15 +21,13 @@
 		0C340AC321A348C600734F1C /* PerformanceMonitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0C340AB621A348C600734F1C /* PerformanceMonitor.swift */; };
 		0C340AC421A348C600734F1C /* PerformanceСalculator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0C340AB721A348C600734F1C /* PerformanceСalculator.swift */; };
 		0C340AC521A348C600734F1C /* PerformanceСalculator.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0C340AB721A348C600734F1C /* PerformanceСalculator.swift */; };
-		1B076A082518CB1A0086536C /* Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = EB46D87824F86404006F54B3 /* Extensions.swift */; };
 		42AD06F31E1D18C400A5C840 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 42AD06E71E1D18C400A5C840 /* AppDelegate.swift */; };
 		42AD06F41E1D18C400A5C840 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 42AD06E81E1D18C400A5C840 /* Assets.xcassets */; };
 		42AD06F51E1D18C400A5C840 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 42AD06E91E1D18C400A5C840 /* LaunchScreen.storyboard */; };
 		42AD06F61E1D18C400A5C840 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 42AD06EB1E1D18C400A5C840 /* Main.storyboard */; };
 		42C2CBE81E244D6300A96A93 /* GDPerformanceView-iOS.h in Headers */ = {isa = PBXBuildFile; fileRef = 42C2CBE61E244D6300A96A93 /* GDPerformanceView-iOS.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		42C2CBEB1E244D6300A96A93 /* GDPerformanceView.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 42C2CBE41E244D6300A96A93 /* GDPerformanceView.framework */; };
 		42C2CBEC1E244D6300A96A93 /* GDPerformanceView.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = 42C2CBE41E244D6300A96A93 /* GDPerformanceView.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
-		EB46D87A24F864D4006F54B3 /* Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = EB46D87824F86404006F54B3 /* Extensions.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -73,7 +71,6 @@
 		42C2CBE41E244D6300A96A93 /* GDPerformanceView.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = GDPerformanceView.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		42C2CBE61E244D6300A96A93 /* GDPerformanceView-iOS.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "GDPerformanceView-iOS.h"; sourceTree = "<group>"; };
 		42C2CBE71E244D6300A96A93 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
-		EB46D87824F86404006F54B3 /* Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Extensions.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -136,7 +133,6 @@
 				0C340AB121A348C600734F1C /* MarginLabel.swift */,
 				0C340AB321A348C600734F1C /* Protocols.swift */,
 				0C340AB421A348C600734F1C /* LinkedFramesList.swift */,
-				EB46D87824F86404006F54B3 /* Extensions.swift */,
 			);
 			path = GDPerformanceMonitoring;
 			sourceTree = "<group>";
@@ -269,7 +265,6 @@
 			buildActionMask = 2147483647;
 			files = (
 				0C340ABE21A348C600734F1C /* LinkedFramesList.swift in Sources */,
-				1B076A082518CB1A0086536C /* Extensions.swift in Sources */,
 				42AD06F31E1D18C400A5C840 /* AppDelegate.swift in Sources */,
 				0C340ABC21A348C600734F1C /* Protocols.swift in Sources */,
 				0C340AC221A348C600734F1C /* PerformanceMonitor.swift in Sources */,
@@ -287,7 +282,6 @@
 				0C340AC521A348C600734F1C /* PerformanceСalculator.swift in Sources */,
 				0C340AC121A348C600734F1C /* WindowViewController.swift in Sources */,
 				0C340AB921A348C600734F1C /* MarginLabel.swift in Sources */,
-				EB46D87A24F864D4006F54B3 /* Extensions.swift in Sources */,
 				0C340ABB21A348C600734F1C /* PerformanceView.swift in Sources */,
 				0C340ABF21A348C600734F1C /* LinkedFramesList.swift in Sources */,
 				0C340AC321A348C600734F1C /* PerformanceMonitor.swift in Sources */,
@@ -447,7 +441,7 @@
 				INFOPLIST_FILE = "GDPerformanceView-Swift/Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				MARKETING_VERSION = 2.1.0;
+				MARKETING_VERSION = 2.1.1;
 				PRODUCT_BUNDLE_IDENTIFIER = "GD.GDPerformanceView-Swift";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
@@ -463,7 +457,7 @@
 				INFOPLIST_FILE = "GDPerformanceView-Swift/Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				MARKETING_VERSION = 2.1.0;
+				MARKETING_VERSION = 2.1.1;
 				PRODUCT_BUNDLE_IDENTIFIER = "GD.GDPerformanceView-Swift";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_VERSION = 5.0;
@@ -484,7 +478,7 @@
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				MARKETING_VERSION = 2.1.0;
+				MARKETING_VERSION = 2.1.1;
 				PRODUCT_BUNDLE_IDENTIFIER = "GD.GDPerformanceView-iOS";
 				PRODUCT_NAME = GDPerformanceView;
 				SKIP_INSTALL = YES;
@@ -509,7 +503,7 @@
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				MARKETING_VERSION = 2.1.0;
+				MARKETING_VERSION = 2.1.1;
 				PRODUCT_BUNDLE_IDENTIFIER = "GD.GDPerformanceView-iOS";
 				PRODUCT_NAME = GDPerformanceView;
 				SKIP_INSTALL = YES;

GDPerformanceView-Swift/GDPerformanceMonitoring/PerformanceView.swift

@@ -78,7 +78,7 @@ internal class PerformanceView: UIWindow, PerformanceViewConfigurator {
     required internal init() {
         super.init(frame: PerformanceView.windowFrame(withPrefferedHeight: Constants.prefferedHeight))
         if #available(iOS 13, *) {
-            self.windowScene = UIApplication.shared.keyWindowScene
+            self.windowScene = PerformanceView.keyWindowScene()
         }
 
         self.configureWindow()
@@ -329,7 +329,7 @@ private extension PerformanceView {
     }
 
     func canBeVisible() -> Bool {
-        if let window = UIApplication.shared.keyWindow, window.isKeyWindow, !window.isHidden {
+        if let window = PerformanceView.keyWindow(), window.isKeyWindow, !window.isHidden {
             return true
         }
         return false
@@ -340,7 +340,7 @@ private extension PerformanceView {
 
 private extension PerformanceView {
     class func windowFrame(withPrefferedHeight height: CGFloat) -> CGRect {
-        guard let window = UIApplication.shared.keyWindow else {
+        guard let window = PerformanceView.keyWindow() else {
             return .zero
         }
 
@@ -358,4 +358,19 @@ private extension PerformanceView {
         }
         return CGRect(x: 0.0, y: topInset, width: window.bounds.width, height: height)
     }
+
+    class func keyWindow() -> UIWindow? {
+        if #available(iOS 13, *) {
+            return UIApplication.shared.windows.first(where: { $0.isKeyWindow })
+        } else {
+            return UIApplication.shared.keyWindow
+        }
+    }
+
+    @available(iOS 13, *)
+    class func keyWindowScene() -> UIWindowScene? {
+        return UIApplication.shared.connectedScenes
+            .filter { $0.activationState == .foregroundActive }
+            .first as? UIWindowScene
+    }
 }

README.md

@@ -2,7 +2,7 @@
 Shows FPS, CPU and memory usage, device model, app and iOS versions above the status bar and report FPS, CPU and memory usage via delegate.
 
 [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-brightgreen.svg)](https://github.com/Carthage/Carthage) 
-[![Pod Version](https://img.shields.io/badge/Pod-2.1.0-6193DF.svg)](https://cocoapods.org/)
+[![Pod Version](https://img.shields.io/badge/Pod-2.1.1-6193DF.svg)](https://cocoapods.org/)
 ![Swift Version](https://img.shields.io/badge/xCode-12.0+-blue.svg)
 ![Swift Version](https://img.shields.io/badge/iOS-9.0+-blue.svg) 
 ![Swift Version](https://img.shields.io/badge/Swift-5.0+-orange.svg)
@@ -21,7 +21,7 @@ Simply add GDPerformanceMonitoring folder with files to your project, or use Coc
 Create a `Cartfile` that lists the framework and run `carthage update`. Follow the [instructions](https://github.com/Carthage/Carthage#if-youre-building-for-ios) to add `$(SRCROOT)/Carthage/Build/iOS/GDPerformanceView.framework` to an iOS project.
 
 ```ruby
-github "dani-gavrilov/GDPerformanceView-Swift" ~> 2.1.0
+github "dani-gavrilov/GDPerformanceView-Swift" ~> 2.1.1
 ```
 Don't forget to import GDPerformanceView by adding: 
 
@@ -37,7 +37,7 @@ platform :ios, '8.0'
 use_frameworks!
 
 target 'project_name' do
-	pod 'GDPerformanceView-Swift', '~> 2.1.0'
+	pod 'GDPerformanceView-Swift', '~> 2.1.1'
 end
 ```
 Don't forget to import GDPerformanceView by adding: