feat: improve safe area handling

Author: okwasniewski

ios/Extensions.swift

@@ -37,3 +37,38 @@ extension UIView {
   }
 }
 
+extension UIHostingController {
+  convenience public init(rootView: Content, ignoreSafeArea: Bool) {
+    self.init(rootView: rootView)
+
+    if ignoreSafeArea {
+      disableSafeArea()
+    }
+  }
+
+  /// Disables safe area insets by dynamically subclassing the hosting controller's view
+  /// and overriding safeAreaInsets to return .zero.
+  func disableSafeArea() {
+    guard let viewClass = object_getClass(view) else { return }
+
+    let viewSubclassName = String(cString: class_getName(viewClass)).appending("_IgnoreSafeArea")
+    if let viewSubclass = NSClassFromString(viewSubclassName) {
+      object_setClass(view, viewSubclass)
+    }
+    else {
+      guard let viewClassNameUtf8 = (viewSubclassName as NSString).utf8String else { return }
+      guard let viewSubclass = objc_allocateClassPair(viewClass, viewClassNameUtf8, 0) else { return }
+
+      if let method = class_getInstanceMethod(UIView.self, #selector(getter: UIView.safeAreaInsets)) {
+        let safeAreaInsets: @convention(block) (AnyObject) -> UIEdgeInsets = { _ in
+          return .zero
+        }
+        class_addMethod(viewSubclass, #selector(getter: UIView.safeAreaInsets), imp_implementationWithBlock(safeAreaInsets), method_getTypeEncoding(method))
+      }
+
+      objc_registerClassPair(viewSubclass)
+      object_setClass(view, viewSubclass)
+    }
+  }
+}
+

ios/PagerViewProvider.swift

@@ -1,8 +1,6 @@
 import SwiftUI
 import UIKit
 
-
-
 @objc public enum PageScrollState: Int {
   case idle
   case dragging
@@ -70,10 +68,6 @@ import UIKit
     self.delegate = delegate
   }
 
-  override public func didUpdateReactSubviews() {
-    props.children = reactSubviews().map(IdentifiablePlatformView.init)
-  }
-
   @objc(insertChild:atIndex:)
   public func insertChild(_ child: UIView, at index: Int) {
     guard index >= 0 && index <= props.children.count else {
@@ -110,13 +104,17 @@ import UIKit
       return
     }
 
-    self.hostingController = UIHostingController(rootView: PagerView(props: props, delegate: delegate))
-    if let hostingController = self.hostingController, let parentViewController = reactViewController() {
+    self.hostingController = UIHostingController(
+      rootView: PagerView(props: props, delegate: delegate),
+      ignoreSafeArea: true
+    )
+    if let hostingController, let parentViewController = reactViewController() {
       parentViewController.addChild(hostingController)
       hostingController.view.backgroundColor = .clear
       addSubview(hostingController.view)
-      hostingController.view.translatesAutoresizingMaskIntoConstraints = false
-      hostingController.view.pinEdges(to: self)
+      hostingController.view.frame = bounds
+
+      hostingController.didMove(toParent: parentViewController)
     }
   }
 }