refactor: move class reverting to controller

Author: osdnk

ios/SlackBottomSheet.m

@@ -180,11 +180,6 @@ - (void)setVisible:(BOOL)visible {
       }
       self.transitionDuration = [[NSNumber alloc] initWithDouble: 0];
       UIViewController *rootViewController = [UIApplication sharedApplication].delegate.window.rootViewController;
-      UIView* pview = [[[[rootViewController presentedViewController] view] superview] superview];
-      NSString *s = NSStringFromClass([pview class]);
-      if ([s isEqualToString:@"reactnativeslackbottomsheet.PossiblyTouchesPassableUIView"]) {
-        [pview performSelector:NSSelectorFromString(@"makeOldClass")];
-      }
 
       [[rootViewController presentedViewController] dismissViewControllerAnimated:!self->_isHiding completion:^{
         self.transitionDuration = oldTransitionDuration;

ios/UIViewController+PanModalPresenter.swift

@@ -64,7 +64,7 @@ class PossiblyTouchesPassableUIView: UIView {
     }
   }
 
-  @objc func makeOldClass() {
+  func makeOldClass() {
     if self.oldClass != nil {
       let oldClassMem = self.oldClass!
       self.oldClass = nil
@@ -238,6 +238,13 @@ class PanModalViewController: UIViewController, PanModalPresentable {
     }
   }
 
+  override func viewWillDisappear(_ animated: Bool) {
+    let pview = view?.superview?.superview!
+    if (pview is PossiblyTouchesPassableUIView) {
+      (pview as! PossiblyTouchesPassableUIView).makeOldClass()
+    }
+    super.viewWillDisappear(animated)
+  }
 }