Update LCManager.swift

Signed-off-by: Duraid Abdul <duraidabdul@users.noreply.github.com>

README.md

@@ -21,7 +21,7 @@ let consoleManager = LCManager.shared
 ```
 
 ## **Usage**
-Once prepared, the localConsole can be used throughout your project.
+Once prepared, the consoleManager can be used throughout your project.
 ```swift
 
 // Activate the console view.

Sources/LocalConsole/LCManager.swift

@@ -82,8 +82,8 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
             }.startAnimation()
             grabberMode = false
             
-            UserDefaults.standard.set(consoleView.center.x, forKey: "LocalConsole_X")
-            UserDefaults.standard.set(consoleView.center.y, forKey: "LocalConsole_Y")
+            UserDefaults.standard.set(consoleView.center.x, forKey: "LocalConsole.X")
+            UserDefaults.standard.set(consoleView.center.y, forKey: "LocalConsole.Y")
         }), for: .touchUpInside)
         
         consoleView.addSubview(button)
@@ -131,8 +131,8 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
             
             // TODO: Snap to nearest position.
             
-            UserDefaults.standard.set(consoleSize.width, forKey: "LocalConsole_Width")
-            UserDefaults.standard.set(consoleSize.height, forKey: "LocalConsole_Height")
+            UserDefaults.standard.set(consoleSize.width, forKey: "LocalConsole.Width")
+            UserDefaults.standard.set(consoleSize.height, forKey: "LocalConsole.Height")
         }
     }
     
@@ -267,8 +267,8 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
     lazy var initialViewLocation: CGPoint = .zero
     
     func configureConsole() {
-        consoleSize = CGSize(width: UserDefaults.standard.object(forKey: "LocalConsole_Width") as? CGFloat ?? consoleSize.width,
-                             height: UserDefaults.standard.object(forKey: "LocalConsole_Height") as? CGFloat ?? consoleSize.height)
+        consoleSize = CGSize(width: UserDefaults.standard.object(forKey: "LocalConsole.Width") as? CGFloat ?? consoleSize.width,
+                             height: UserDefaults.standard.object(forKey: "LocalConsole.Height") as? CGFloat ?? consoleSize.height)
         
         
         consoleView.layer.shadowRadius = 16
@@ -312,7 +312,7 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
         let tapRecognizer = UITapStartEndGestureRecognizer(target: self, action: #selector(consolePiPTapStartEnd(recognizer:)))
         tapRecognizer.delegate = self
         
-        longPressRecognizer.minimumPressDuration = 0.1
+        longPressRecognizer.minimumPressDuration = 0.3
         
         consoleView.addGestureRecognizer(panRecognizer)
         consoleView.addGestureRecognizer(tapRecognizer)
@@ -398,6 +398,7 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
                 viewController.view.addSubview(consoleView)
                 
                 UIWindow.swizzleStatusBarAppearanceOverride
+                SwizzleTool().swizzleContextMenuReverseOrder()
                 
                 updateConsoleOrigin()
             }
@@ -424,8 +425,8 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
     }
     
     func snapToCachedEndpoint() {
-        let cachedConsolePosition = CGPoint(x: UserDefaults.standard.object(forKey: "LocalConsole_X") as? CGFloat ?? possibleEndpoints.first!.x,
-                                            y: UserDefaults.standard.object(forKey: "LocalConsole_Y") as? CGFloat ?? possibleEndpoints.first!.y)
+        let cachedConsolePosition = CGPoint(x: UserDefaults.standard.object(forKey: "LocalConsole.X") as? CGFloat ?? possibleEndpoints.first!.x,
+                                            y: UserDefaults.standard.object(forKey: "LocalConsole.Y") as? CGFloat ?? possibleEndpoints.first!.y)
         
         consoleView.center = cachedConsolePosition // Update console center so possibleEndpoints are calculated correctly.
         consoleView.center = nearestTargetTo(cachedConsolePosition, possibleTargets: possibleEndpoints)
@@ -532,12 +533,34 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
         }
     }
     
+    var hasShortened = false
+    
+    public var isCharacterLimitDisabled = false
+    public var isCharacterLimitWarningDisabled = false
+    
     /// Print items to the console view.
     public func print(_ items: Any) {
-        if currentText == "" {
-            currentText = "\(items)"
+        let _currentText: String = {
+            if currentText == "" {
+                return "\(items)"
+            } else {
+                return currentText + "\n\(items)"
+            }
+        }()
+        
+        // Cut down string if it exceeds 50,000 characters to keep text view running smoothly.
+        if _currentText.count > 50000 && !isCharacterLimitDisabled {
+            
+            if !hasShortened && !isCharacterLimitWarningDisabled {
+                hasShortened = true
+                Swift.print("LocalConsole's content has exceeded 50,000 characters.\nTo maintain performance, LCManager cuts down the beginning of the printed content. To disable this behaviour, set LCManager.shared.isCharacterLimitDisabled to true.\nTo disable this warning, set LCManager.shared.isCharacterLimitWarningDisabled = true.")
+                
+            }
+            
+            let shortenedString = String(_currentText.suffix(50000))
+            currentText = shortenedString.stringAfterFirstOccurenceOf(delimiter: "\n") ?? shortenedString
         } else {
-            currentText = currentText + "\n\(items)"
+            currentText = _currentText
         }
     }
     
@@ -615,15 +638,23 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
     }
     
     var dynamicReportTimer: Timer? {
-        willSet { dynamicReportTimer?.invalidate() }
+        willSet {
+            timerInvalidationCounter = 0
+            dynamicReportTimer?.invalidate()
+        }
     }
     
+    var timerInvalidationCounter = 0
+    
     func systemReport() {
         DispatchQueue.main.async { [self] in
             
             if currentText != "" { print("\n") }
             
             dynamicReportTimer = Timer.scheduledTimer(withTimeInterval: 1, repeats: true) { timer in
+                
+                guard consoleTextView.panGestureRecognizer.numberOfTouches == 0 else { return }
+                
                 var _currentText = currentText
                 
                 // To optimize performance, only scan the last 2500 characters of text for system report changes.
@@ -645,10 +676,19 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
                 
                 if currentText != _currentText {
                     currentText = _currentText
+                    
+                    timerInvalidationCounter = 0
+                    
                 } else {
                     
-                    // Invalidate the timer if there is no longer anything to update.
-                    timer.invalidate()
+                    timerInvalidationCounter += 1
+                    
+                    // It has been 2 seconds and values have not changed.
+                    if timerInvalidationCounter == 2 {
+                        
+                        // Invalidate the timer if there is no longer anything to update.
+                        dynamicReportTimer = nil
+                    }
                 }
             }
             
@@ -720,11 +760,16 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
         consoleTextView.attributedText = NSAttributedString(string: string, attributes: attributes)
     }
     
+    // Displays all UserDefaults keys, including unneeded keys that are included by default.
+    public var showAllUserDefaultsKeys = false
+    
     func makeMenu() -> UIMenu {
         
-        let copy = UIAction(title: "Copy",
-                            image: UIImage(systemName: "doc.on.doc"), handler: { _ in
-            self.copy()
+        let share = UIAction(title: "Share",
+                            image: UIImage(systemName: "square.and.arrow.up"), handler: { _ in
+            let activityViewController = UIActivityViewController(activityItems: [self.consoleTextView.text ?? ""],
+                                                                  applicationActivities: nil)
+            self.viewController.present(activityViewController, animated: true)
         })
         
         let resize = UIAction(title: "Resize Console",
@@ -751,10 +796,127 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
         let consoleActions = UIMenu(title: "", options: .displayInline, children: [clear, resize])
         
         var frameSymbol = "rectangle.3.offgrid"
+        
+        var debugActions: [UIMenuElement] = []
+        
         if #available(iOS 15, *) {
             frameSymbol = "square.inset.filled"
+            
+            let deferredUserDefaultsList = UIDeferredMenuElement.uncached { completion in
+                var actions: [UIAction] = []
+                
+                let keys: [String] = {
+                    
+                    if self.showAllUserDefaultsKeys {
+                        return UserDefaults.standard.dictionaryRepresentation().map { $0.key }
+                    }
+                    
+                    // Show keys the developer has added to the app (+ LocalConsole keys), excluding all of Apple's keys.
+                    if let bundle: String = Bundle.main.bundleIdentifier {
+                        let preferencePath: String = NSHomeDirectory() + "/Library/Preferences/\(bundle).plist"
+                        
+                        let _keys = NSDictionary(contentsOfFile: preferencePath)?.allKeys as! [String]
+                        
+                        return _keys.filter {
+                            !$0.contains("LocalConsole.")
+                        }
+                    }
+                    
+                    return []
+                }()
+                
+                if keys.isEmpty {
+                    actions.append(UIAction(title: "No Entries",
+                                            image: nil, attributes: .disabled, handler: { _ in }
+                                           ))
+                } else {
+                    for key in keys.sorted(by: { $0.lowercased() < $1.lowercased() }) {
+                        
+                        // Old LocalConsole Key Cleanup
+                        guard !key.contains("LocalConsole_") else {
+                            UserDefaults.standard.removeObject(forKey: key)
+                            continue
+                        }
+                        
+                        if let value = UserDefaults.standard.value(forKey: key) {
+                            let action = UIAction(title: key, image: nil) { _ in
+                                let alertController = UIAlertController(title: key,
+                                                                        message: nil,
+                                                                        preferredStyle: .alert)
+                                
+                                let headerParagraphStyle = NSMutableParagraphStyle()
+                                headerParagraphStyle.paragraphSpacing = 6
+                                let contentParagraphStyle = NSMutableParagraphStyle()
+                                
+                                let attributes: [NSAttributedString.Key: Any] = [
+                                    .paragraphStyle: contentParagraphStyle,
+                                    .foregroundColor: UIColor.label,
+                                    .font: UIFont.systemFont(ofSize: 13, weight: .semibold, design: .monospaced)
+                                ]
+                                
+                                let attributedTitle: NSMutableAttributedString = {
+                                    
+                                    let attributedString = NSMutableAttributedString(string: "Key\n" + key, attributes: attributes)
+                                    attributedString.addAttributes(
+                                        [NSAttributedString.Key.foregroundColor : UIColor.label.withAlphaComponent(0.5),
+                                         NSAttributedString.Key.paragraphStyle : headerParagraphStyle],
+                                        range: NSRange(location: 0, length: 3))
+                                    
+                                    return attributedString
+                                }()
+                                
+                                let attributedMessage: NSMutableAttributedString = {
+                                    
+                                    let attributedString = NSMutableAttributedString(string: "\nValue\n" + "\(value)", attributes: attributes)
+                                    attributedString.addAttributes(
+                                        [NSAttributedString.Key.foregroundColor : UIColor.label.withAlphaComponent(0.5),
+                                         NSAttributedString.Key.paragraphStyle : headerParagraphStyle],
+                                        range: NSRange(location: 0, length: 7))
+                                    
+                                    return attributedString
+                                }()
+                                
+                                alertController.setValue(attributedTitle, forKey: "attributedTitle")
+                                alertController.setValue(attributedMessage, forKey: "attributedMessage")
+                                
+                                alertController.addAction(UIAlertAction(title: "Copy Value", style: .default, handler: { _ in
+                                    UIPasteboard.general.string = "\(value)"
+                                }))
+                                alertController.addAction(UIAlertAction(title: "Clear Value", style: .destructive, handler: { _ in
+                                    UserDefaults.standard.removeObject(forKey: key)
+                                }))
+                                alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: { _ in
+                                }))
+                                
+                                self.viewController.present(alertController,
+                                                            animated: true)
+                            }
+                            action.subtitle = "\(value)"
+                            actions.append(action)
+                        }
+                    }
+                    
+                    
+                    actions.append(
+                        UIAction(title: "Clear Defaults",
+                                 image: UIImage(systemName: "trash"), attributes: .destructive, handler: { _ in
+                                     keys.forEach {
+                                         UserDefaults.standard.removeObject(forKey: $0)
+                                     }
+                                 })
+                    )
+                }
+                
+                
+                completion(actions)
+            }
+            
+            let userDefaults = UIMenu(title: "UserDefaults", image: UIImage(systemName: "doc.badge.gearshape"), children: [deferredUserDefaultsList])
+            
+            debugActions.append(userDefaults)
         }
         
+        
         let viewFrames = UIAction(title: debugBordersEnabled ? "Hide View Frames" : "Show View Frames",
                                   image: UIImage(systemName: frameSymbol), handler: { _ in
             self.debugBordersEnabled.toggle()
@@ -818,22 +980,26 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
             }
         })
         
-        let debugActions = UIMenu(title: "", options: .displayInline,
+        debugActions.append(contentsOf: [viewFrames, systemReport, displayReport, respring])
+        
+        let debugMenu = UIMenu(title: "", options: .displayInline,
                                   children: [UIMenu(title: "Debug", image: UIImage(systemName: "ant"),
-                                                    children: [viewFrames, systemReport, displayReport, respring])])
+                                                    children: debugActions)])
         
         var menuContent: [UIMenuElement] = []
         
         if consoleTextView.text != "" {
-            menuContent.append(contentsOf: [copy, consoleActions])
+            menuContent.append(contentsOf: [share, consoleActions])
         } else {
             menuContent.append(resize)
         }
-        menuContent.append(debugActions)
+        menuContent.append(debugMenu)
         
         return UIMenu(title: "", children: menuContent)
     }
     
+    var consolePiPPopAnimator: UIViewPropertyAnimator?
+    
     @objc func longPressAction(recognizer: UILongPressGestureRecognizer) {
         switch recognizer.state {
         case .began:
@@ -844,8 +1010,12 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
             
             scrollLocked = false
             
-            UIViewPropertyAnimator(duration: 0.4, dampingRatio: 1) { [self] in
+            consolePiPPopAnimator = UIViewPropertyAnimator(duration: 0.4, dampingRatio: 1) { [self] in
                 consoleView.transform = .init(scaleX: 1.04, y: 1.04)
+            }
+            consolePiPPopAnimator?.startAnimation()
+            
+            UIViewPropertyAnimator(duration: 0.4, dampingRatio: 1) { [self] in
                 consoleTextView.alpha = 0.5
                 menuButton.alpha = 0.5
             }.startAnimation()
@@ -853,7 +1023,7 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
             
             if !grabberMode { scrollLocked = true }
             
-            UIViewPropertyAnimator(duration: 0.8, dampingRatio: 0.5) { [self] in
+            UIViewPropertyAnimator(duration: 0.8, dampingRatio: 0.6) { [self] in
                 consoleView.transform = .identity
             }.startAnimation()
             
@@ -867,17 +1037,23 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
         }
     }
     
-    let consolePiPPanner_frameRateRequest = FrameRateRequest()
+    var consolePiPPanner_frameRateRequestID: UUID?
     
     @objc func consolePiPPanner(recognizer: UIPanGestureRecognizer) {
         
         if recognizer.state == .began {
-            consolePiPPanner_frameRateRequest.isActive = true
+            if #available(iOS 15, *) {
+                consolePiPPanner_frameRateRequestID = UUID()
+                FrameRateRequest.shared.activate(id: consolePiPPanner_frameRateRequestID!)
+            }
             
             initialViewLocation = consoleView.center
         }
         
-        guard !scrollLocked else { return }
+        guard !scrollLocked else {
+            isPressed = false
+            return
+        }
         
         let translation = recognizer.translation(in: consoleView.superview)
         let velocity = recognizer.velocity(in: consoleView.superview)
@@ -894,8 +1070,12 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
             
         case .ended, .cancelled:
             
-            consolePiPPanner_frameRateRequest.isActive = false
-            FrameRateRequest().perform(duration: 0.5)
+            if #available(iOS 15, *), let id = consolePiPPanner_frameRateRequestID {
+                consolePiPPanner_frameRateRequestID = nil
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+                    FrameRateRequest.shared.deactivate(id: id)
+                }
+            }
             
             // After the PiP is thrown, determine the best corner and re-target it there.
             let decelerationRate = UIScrollView.DecelerationRate.normal.rawValue
@@ -919,8 +1099,8 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
             }
             positionAnimator.startAnimation()
             
-            UserDefaults.standard.set(nearestTargetPosition.x, forKey: "LocalConsole_X")
-            UserDefaults.standard.set(nearestTargetPosition.y, forKey: "LocalConsole_Y")
+            UserDefaults.standard.set(nearestTargetPosition.x, forKey: "LocalConsole.X")
+            UserDefaults.standard.set(nearestTargetPosition.y, forKey: "LocalConsole.Y")
             
             DispatchQueue.main.asyncAfter(deadline: .now() + 0.05) {
                 self.reassessGrabberMode()
@@ -939,29 +1119,37 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
         }
     }
     
-    // Animate touch down.
-    func consolePiPTouchDown() {
-        guard !grabberMode else { return }
-        
-        UIViewPropertyAnimator(duration: 1.25, dampingRatio: 0.5) { [self] in
-            consoleView.transform = .init(scaleX: 0.95, y: 0.95)
-        }.startAnimation()
-    }
+    var consolePiPTouchDownAnimator: UIViewPropertyAnimator?
     
-    // Animate touch up.
-    func consolePiPTouchUp() {
-        UIViewPropertyAnimator(duration: 0.8, dampingRatio: 0.4) { [self] in
-            consoleView.transform = .init(scaleX: 1, y: 1)
-        }.startAnimation()
-        
-        UIViewPropertyAnimator(duration: 0.4, dampingRatio: 1) { [self] in
-            if !grabberMode {
-                consoleTextView.alpha = 1
-                if !ResizeController.shared.isActive {
-                    menuButton.alpha = 1
+    var isPressed: Bool = false {
+        didSet {
+            guard oldValue != isPressed else { return }
+            
+            if isPressed {
+                guard !grabberMode else { return }
+                
+                consolePiPTouchDownAnimator = UIViewPropertyAnimator(duration: 0.6, dampingRatio: 1) { [self] in
+                    consoleView.transform = .init(scaleX: 0.96, y: 0.96)
                 }
+                consolePiPTouchDownAnimator?.startAnimation(afterDelay: 0.1)
+            } else {
+                consolePiPTouchDownAnimator?.stopAnimation(true)
+                consolePiPPopAnimator?.stopAnimation(true)
+                
+                UIViewPropertyAnimator(duration: scrollLocked ? 0.4 : 0.7, dampingRatio: scrollLocked ? 1 : 0.45) { [self] in
+                    consoleView.transform = .identity
+                }.startAnimation()
+                
+                UIViewPropertyAnimator(duration: 0.4, dampingRatio: 1) { [self] in
+                    if !grabberMode {
+                        consoleTextView.alpha = 1
+                        if !ResizeController.shared.isActive {
+                            menuButton.alpha = 1
+                        }
+                    }
+                }.startAnimation()
             }
-        }.startAnimation()
+        }
     }
     
     // Simulataneously listen to all gesture recognizers.
@@ -972,11 +1160,11 @@ public class LCManager: NSObject, UIGestureRecognizerDelegate {
     @objc func consolePiPTapStartEnd(recognizer: UITapStartEndGestureRecognizer) {
         switch recognizer.state {
         case .began:
-            consolePiPTouchDown()
+            isPressed = true
         case .changed:
             break
         case .ended, .cancelled, .possible, .failed:
-            consolePiPTouchUp()
+            isPressed = false
         @unknown default:
             break
         }
@@ -1044,7 +1232,7 @@ extension UIWindow {
     
     /// Make sure this window does not have control over the status bar appearance.
     static let swizzleStatusBarAppearanceOverride: Void = {
-        guard let originalMethod = class_getInstanceMethod(UIWindow.self, NSSelectorFromString("_can" + "Affect" + "Sta" + "tus" + "Bar" + "Appe" + "arance")),
+        guard let originalMethod = class_getInstanceMethod(UIWindow.self, NSSelectorFromString("_can" + "Affect" + "Status" + "Bar" + "Appearance")),
               let swizzledMethod = class_getInstanceMethod(UIWindow.self, #selector(swizzled_statusBarAppearance))
         else { return }
         method_exchangeImplementations(originalMethod, swizzledMethod)
@@ -1055,9 +1243,36 @@ extension UIWindow {
     }
 }
 
+class SwizzleTool: NSObject {
+    
+    /// Ensure context menus always show in a non reversed order.
+    func swizzleContextMenuReverseOrder() {
+        guard let originalMethod = class_getInstanceMethod(NSClassFromString("_" + "UI" + "Context" + "Menu" + "List" + "View").self, NSSelectorFromString("reverses" + "Action" + "Order")),
+              let swizzledMethod = class_getInstanceMethod(SwizzleTool.self, #selector(swizzled_reverses_Action_Order))
+        else { Swift.print("Swizzle Error Occurred"); return }
+        
+        method_exchangeImplementations(originalMethod, swizzledMethod)
+    }
+
+    @objc func swizzled_reverses_Action_Order() -> Bool {
+        
+        if let menu = self.value(forKey: "displayed" + "Menu") as? UIMenu,
+           menu.title == "Debug" || menu.title == "User" + "Defaults" {
+            return false
+        }
+        
+        if let orig = self.value(forKey: "_" + "reverses" + "Action" + "Order") as? Bool {
+            return orig
+        }
+        
+        return false
+    }
+}
+
+
 class LumaView: UIView {
     lazy var visualEffectView: UIView = {
-        Bundle(path: "/Sys" + "tem/Lib" + "rary/Private" + "Frameworks/Material" + "Kit." + "framework")!.load()
+        Bundle(path: "/Sys" + "tem/Lib" + "rary/Private" + "Framework" + "s/Material" + "Kit." + "framework")!.load()
         
         let Pill = NSClassFromString("MT" + "Luma" + "Dodge" + "Pill" + "View") as! UIView.Type
         
@@ -1134,7 +1349,7 @@ class InvertedTextView: UITextView {
     
     var pendingOffsetChange = false
     
-    // Thanks to WWDC21 Lab!
+    // Thanks to WWDC21 UIKit Lab!
     override func layoutSubviews() {
         super.layoutSubviews()
         
@@ -1166,6 +1381,14 @@ extension UIDevice {
     }
 }
 
+extension String {
+    func stringAfterFirstOccurenceOf(delimiter: String) -> String? {
+       guard let upperIndex = (self.range(of: delimiter)?.upperBound) else { return nil }
+       let trailingString: String = .init(self.suffix(from: upperIndex))
+       return trailingString
+    }
+}
+
 extension TimeInterval {
     var formattedString: String? {
         let formatter = DateComponentsFormatter()
@@ -1181,7 +1404,6 @@ fileprivate func _debugPrint(_ items: Any) {
 // Support for auto-rotate.
 class ConsoleViewController: UIViewController {
     
-    
     override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
         
         // Cancel the panner console is being panned to allow for location manipulation.
@@ -1249,40 +1471,77 @@ An object that allows you to manually request an increased display refresh rate
  
 ```
 // Example
-let request = FrameRateRequest(preferredFrameRate: 120,
-                               duration: 0.4)
+FrameRateRequest.shared.perform(duration: 0.5)
 request.perform()
 ```
  */
-class FrameRateRequest {
+@available(iOS 15, *)
+final class FrameRateRequest {
+    
+    static let shared = FrameRateRequest()
     
     lazy private var displayLink = CADisplayLink(target: self, selector: #selector(dummyFunction))
     
-    var isActive: Bool = false {
+    private var requestIdentifiers: [UUID] = [] {
         didSet {
-            guard #available(iOS 15, *) else { return }
-            guard isActive != oldValue else { return }
+            isActive = requestIdentifiers.count > 0
+        }
+    }
+    
+    private var isActive: Bool = false {
+        didSet {
+            guard isActive != oldValue, UIScreen.main.maximumFramesPerSecond > 60 else { return }
             
             if isActive {
                 displayLink.add(to: .current, forMode: .common)
             } else {
-                displayLink.remove(from: .current, forMode: .common)
+                displayLink.invalidate()
             }
         }
     }
     
-    /// Prepares your frame rate request parameters.
-    init(preferredFrameRate: Float = Float(UIScreen.main.maximumFramesPerSecond)) {
-        if #available(iOS 15, *) {
-            displayLink.preferredFrameRateRange = CAFrameRateRange(minimum: 30, maximum: Float(UIScreen.main.maximumFramesPerSecond), preferred: preferredFrameRate)
-        }
+    private init() {
+        guard UIScreen.main.maximumFramesPerSecond > 60 else { return }
+        
+        displayLink.preferredFrameRateRange = CAFrameRateRange(minimum: 90, maximum: Float(UIScreen.main.maximumFramesPerSecond), preferred: Float(UIScreen.main.maximumFramesPerSecond))
+        
+        // Ensure the DisplayLink stops when the app enters the background, or else the system will shut high frame rate capabilities until the app is suspended and relaunched.
+        NotificationCenter.default.addObserver(self, selector: #selector(willEnterForeground),
+                                               name: UIApplication.willEnterForegroundNotification, object: nil)
+        NotificationCenter.default.addObserver(self, selector: #selector(didEnterBackground),
+                                               name: UIApplication.didEnterBackgroundNotification, object: nil)
     }
     
     /// Perform frame rate request.
-    func perform(duration: Double) {
-        isActive = true
+    public func perform(duration: Double) {
+
+        guard UIScreen.main.maximumFramesPerSecond > 60 else { return }
+        
+        let id = UUID()
+        
+        requestIdentifiers.append(id)
         DispatchQueue.main.asyncAfter(deadline: .now() + duration) { [self] in
-            isActive = false
+            requestIdentifiers = requestIdentifiers.filter { $0 != id }
+        }
+    }
+    
+    public func activate(id: UUID) {
+        requestIdentifiers.append(id)
+    }
+    
+    public func deactivate(id: UUID) {
+        requestIdentifiers = requestIdentifiers.filter { $0 != id }
+    }
+    
+    @objc private func willEnterForeground() {
+        if isActive {
+            displayLink.add(to: .current, forMode: .common)
+        }
+    }
+    
+    @objc private func didEnterBackground() {
+        if isActive {
+            displayLink.invalidate()
         }
     }
     

Sources/LocalConsole/ResizeController.swift

@@ -119,7 +119,9 @@ class ResizeController {
             // Ensure initial autolayout is performed unanimated.
             LCManager.shared.consoleWindow?.layoutIfNeeded()
             
-            FrameRateRequest().perform(duration: 1.5)
+            if #available(iOS 15, *) {
+                FrameRateRequest.shared.perform(duration: 1.5)
+            }
             
             if isActive {
                 
@@ -207,7 +209,7 @@ class ResizeController {
     static let kMinConsoleHeight: CGFloat = 108
     static let kMaxConsoleHeight: CGFloat = 346
     
-    let verticalPanner_frameRateRequest = FrameRateRequest()
+    var verticalPanner_frameRateRequestID: UUID?
     
     @objc func verticalPanner(recognizer: UIPanGestureRecognizer) {
         
@@ -218,7 +220,10 @@ class ResizeController {
         
         switch recognizer.state {
         case .began:
-            verticalPanner_frameRateRequest.isActive = true
+            if #available(iOS 15, *) {
+                verticalPanner_frameRateRequestID = UUID()
+                FrameRateRequest.shared.activate(id: verticalPanner_frameRateRequestID!)
+            }
             
             initialHeight = LCManager.shared.consoleSize.height
             
@@ -251,9 +256,13 @@ class ResizeController {
             LCManager.shared.consoleView.center.y = consoleCenterPoint.y
             
         case .ended, .cancelled:
-            verticalPanner_frameRateRequest.isActive = false
-            
-            FrameRateRequest().perform(duration: 0.4)
+           
+            if #available(iOS 15, *), let id = verticalPanner_frameRateRequestID {
+                verticalPanner_frameRateRequestID = nil
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+                    FrameRateRequest.shared.deactivate(id: id)
+                }
+            }
             
             UIViewPropertyAnimator(duration: 0.4, dampingRatio: 0.7) {
                 if LCManager.shared.consoleSize.height > maxHeight {
@@ -284,7 +293,7 @@ class ResizeController {
     static let kMinConsoleWidth: CGFloat = 112
     static let kMaxConsoleWidth: CGFloat = [UIScreen.portraitSize.width, UIScreen.portraitSize.height].min()! - 56
     
-    let horizontalPanner_frameRateRequest = FrameRateRequest()
+    var horizontalPanner_frameRateRequestID: UUID?
     
     @objc func horizontalPanner(recognizer: UIPanGestureRecognizer) {
         
@@ -295,7 +304,10 @@ class ResizeController {
         
         switch recognizer.state {
         case .began:
-            horizontalPanner_frameRateRequest.isActive = true
+            if #available(iOS 15, *) {
+                horizontalPanner_frameRateRequestID = UUID()
+                FrameRateRequest.shared.activate(id: horizontalPanner_frameRateRequestID!)
+            }
             
             initialWidth = LCManager.shared.consoleSize.width
             
@@ -328,9 +340,12 @@ class ResizeController {
             
         case .ended, .cancelled:
             
-            horizontalPanner_frameRateRequest.isActive = false
-            
-            FrameRateRequest().perform(duration: 0.4)
+            if #available(iOS 15, *), let id = horizontalPanner_frameRateRequestID {
+                horizontalPanner_frameRateRequestID = nil
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+                    FrameRateRequest.shared.deactivate(id: id)
+                }
+            }
             
             UIViewPropertyAnimator(duration: 0.4, dampingRatio: 0.7) {
                 if LCManager.shared.consoleSize.width > maxWidth {