Prevent invalidateSafeAreaInsets get call when RNCSafeAreaProviderComponentView still in the fabric view pool (#629)

* Prevent invalidateSafeAreaInsets get call when RNCSafeAreaProviderComponentView still in the fabric view pool

* Register notifications when move to new superview

* Format code

Author: vikage

ios/Fabric/RNCSafeAreaProviderComponentView.mm

@@ -17,6 +17,7 @@ @implementation RNCSafeAreaProviderComponentView {
   UIEdgeInsets _currentSafeAreaInsets;
   CGRect _currentFrame;
   BOOL _initialInsetsSent;
+  BOOL _registeredNotifications;
 }
 
 // Needed because of this: https://github.com/facebook/react-native/pull/37274
@@ -30,33 +31,49 @@ - (instancetype)initWithFrame:(CGRect)frame
   if (self = [super initWithFrame:frame]) {
     static const auto defaultProps = std::make_shared<const RNCSafeAreaProviderProps>();
     _props = defaultProps;
-
-#if !TARGET_OS_TV && !TARGET_OS_OSX
-    [NSNotificationCenter.defaultCenter addObserver:self
-                                           selector:@selector(invalidateSafeAreaInsets)
-                                               name:UIKeyboardDidShowNotification
-                                             object:nil];
-    [NSNotificationCenter.defaultCenter addObserver:self
-                                           selector:@selector(invalidateSafeAreaInsets)
-                                               name:UIKeyboardDidHideNotification
-                                             object:nil];
-    [NSNotificationCenter.defaultCenter addObserver:self
-                                           selector:@selector(invalidateSafeAreaInsets)
-                                               name:UIKeyboardDidChangeFrameNotification
-                                             object:nil];
-#endif
   }
 
   return self;
 }
 
+- (void)willMoveToSuperview:(UIView *)newSuperView
+{
+  [super willMoveToSuperview:newSuperView];
+
+  if (newSuperView != nil && !_registeredNotifications) {
+    _registeredNotifications = YES;
+    [self registerNotifications];
+  }
+}
+
+- (void)registerNotifications
+{
+#if !TARGET_OS_TV && !TARGET_OS_OSX
+  [NSNotificationCenter.defaultCenter addObserver:self
+                                         selector:@selector(invalidateSafeAreaInsets)
+                                             name:UIKeyboardDidShowNotification
+                                           object:nil];
+  [NSNotificationCenter.defaultCenter addObserver:self
+                                         selector:@selector(invalidateSafeAreaInsets)
+                                             name:UIKeyboardDidHideNotification
+                                           object:nil];
+  [NSNotificationCenter.defaultCenter addObserver:self
+                                         selector:@selector(invalidateSafeAreaInsets)
+                                             name:UIKeyboardDidChangeFrameNotification
+                                           object:nil];
+#endif
+}
+
 - (void)safeAreaInsetsDidChange
 {
   [self invalidateSafeAreaInsets];
 }
 
 - (void)invalidateSafeAreaInsets
 {
+  if (self.superview == nil) {
+    return;
+  }
   // This gets called before the view size is set by react-native so
   // make sure to wait so we don't set wrong insets to JS.
   if (CGSizeEqualToSize(self.frame.size, CGSizeZero)) {
@@ -123,6 +140,8 @@ - (void)prepareForRecycle
   _currentSafeAreaInsets = UIEdgeInsetsZero;
   _currentFrame = CGRectZero;
   _initialInsetsSent = NO;
+  [NSNotificationCenter.defaultCenter removeObserver:self];
+  _registeredNotifications = NO;
 }
 
 @end