#import @interface RNSLifecycleAwareView : UIView @end @implementation RNSLifecycleAwareView - (void)didMoveToWindow { [super didMoveToWindow]; BOOL isVisible = self.superview && self.window; if (isVisible) { NSLog(@"ATTACHED"); } else { NSLog(@"DETTACHED"); } } @end @interface RNSLifecycleAwareViewManager : RCTViewManager @end @implementation RNSLifecycleAwareViewManager RCT_EXPORT_MODULE() - (UIView *)view { return [RNSLifecycleAwareView new]; } @end