fix: don't mask SwiftUI gradient views (#275)

* fix: don't mask SwiftUI gradient views

* chore: update CHANGELOG

* fix: lint

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## Next
 
+- fix: avoid masking SwiftUI Gradient views ([#275](https://github.com/PostHog/posthog-ios/pull/275))
+
 ## 3.17.0 - 2024-12-10
 
 - feat: ability to add a custom label to autocapture elements ([#271](https://github.com/PostHog/posthog-ios/pull/271))

PostHog/Replay/PostHogReplayIntegration.swift

@@ -86,6 +86,11 @@
         // These are usually views that don't belong to the current process and are most likely sensitive
         private let systemSandboxedView: AnyClass? = NSClassFromString("_UIRemoteView")
 
+        // These layer types should be safe to ignore while masking
+        private let swiftUISafeLayerTypes: [AnyClass] = [
+            "SwiftUI.GradientLayer", // Views like LinearGradient, RadialGradient, or AngularGradient
+        ].compactMap(NSClassFromString)
+
         static let dispatchQueue = DispatchQueue(label: "com.posthog.PostHogReplayIntegration",
                                                  target: .global(qos: .utility))
 
@@ -331,7 +336,7 @@
             }
 
             // this can be anything, so better to be conservative
-            if swiftUIGenericTypes.contains(where: { view.isKind(of: $0) }) {
+            if swiftUIGenericTypes.contains(where: { view.isKind(of: $0) }), !isSwiftUILayerSafe(view.layer) {
                 if isTextInputSensitive(view), !hasSubViews {
                     maskableWidgets.append(view.toAbsoluteRect(window))
                     return
@@ -439,6 +444,10 @@
             (isTextInputSensitive(view) || view.isSensitiveText()) && (hasText(view.text) || hasText(view.placeholder))
         }
 
+        private func isSwiftUILayerSafe(_ layer: CALayer) -> Bool {
+            swiftUISafeLayerTypes.contains(where: { layer.isKind(of: $0) })
+        }
+
         private func hasText(_ text: String?) -> Bool {
             if let text = text, !text.isEmpty {
                 return true