apply changes from PR - multiple modal on iOS #31498 (#29)

* remove RCTTextView patch

* rename RCTModalHostViewInteractor

* implementing pr 31498 diff (modal works)

* nested modal example

* remove nested modal example

Author: fabOnReact

ios/Views/RCTModalHostViewControllerImproved.h

@@ -10,4 +10,6 @@
 
 @interface RCTModalHostViewControllerImproved : RCTModalHostViewController
 
+@property RCTModalHostViewImproved* modalHostView;
+
 @end

ios/Views/RCTModalHostViewImproved.h

@@ -11,18 +11,18 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
-@protocol RCTModalHostViewInteractorImproved;
+@protocol RCTModalHostViewImprovedInteractor;
 
 @interface RCTModalHostViewImproved : RCTModalHostView
 
-@property (nonatomic, weak) id<RCTModalHostViewInteractorImproved> delegate;
+@property (nonatomic, weak) id<RCTModalHostViewImprovedInteractor> delegate;
 @property (nonatomic, strong) UIWindow *modalWindow;
 
 - (void)dismissModalViewControllerWithCompletion:(void (^)(void))completion;
 
 @end
 
-@protocol RCTModalHostViewInteractorImproved <NSObject>
+@protocol RCTModalHostViewImprovedInteractor <NSObject>
 
 - (void)presentModalHostView:(RCTModalHostView *)modalHostView
           withViewController:(RCTModalHostViewController *)viewController
@@ -32,7 +32,8 @@ NS_ASSUME_NONNULL_BEGIN
                     animated:(BOOL)animated;
 - (void)dismissModalHostViewWithCompletion:(RCTModalHostViewImproved *)modalHostView
                         withViewController:(RCTModalHostViewController *)viewController
-                                  animated:(BOOL)animated completion: (void (^)(void))completion;
+                                  animated:(BOOL)animated 
+                                completion: (void (^)(void))completion;
 
 @end
 

ios/Views/RCTModalHostViewImproved.m

@@ -18,7 +18,7 @@
 @implementation RCTModalHostViewImproved {
   __weak RCTBridge *_bridge;
   BOOL _isPresented;
-  RCTModalHostViewController *_modalViewController;
+  RCTModalHostViewControllerImproved *_modalViewController;
   RCTTouchHandler *_touchHandler;
   UIView *_reactSubview;
   UIInterfaceOrientation _lastKnownOrientation;
@@ -31,12 +31,13 @@ @implementation RCTModalHostViewImproved {
 - (instancetype)initWithBridge:(RCTBridge *)bridge
 {
   self = [super initWithBridge:bridge];
-  _modalViewController = [RCTModalHostViewController new];
+  _modalViewController = [RCTModalHostViewControllerImproved new];
   UIView *containerView = [UIView new];
   containerView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
   _modalViewController.view = containerView;
   _touchHandler = [[RCTTouchHandler alloc] initWithBridge:bridge];
   _isPresented = NO;
+  _modalViewController.modalHostView = self;
 
   return self;
 }
@@ -101,9 +102,17 @@ - (UIInterfaceOrientationMask)supportedOrientationsMask
 }
 
 - (void)dismissModalViewController
+{
+  [self dismissModalViewControllerWithCompletion: nil];
+}
+
+- (void)dismissModalViewControllerWithCompletion:(void (^)(void))completion
 {
   if (_isPresented) {
-    [self.delegate dismissModalHostView:self withViewController:_modalViewController animated:[self hasAnimationType]];
+    [self.delegate dismissModalHostViewWithCompletion:self 
+                                   withViewController:_modalViewController
+                                             animated:[self hasAnimationType]
+                                           completion: completion];
     _isPresented = NO;
   }
 }

ios/Views/RCTModalHostViewImprovedManager.m

@@ -11,7 +11,7 @@
 #import "RCTModalManager.h"
 #import "RCTModalHostViewManager.h"
 
-@interface RCTModalHostViewImprovedManager () <RCTModalHostViewInteractorImproved>
+@interface RCTModalHostViewImprovedManager () <RCTModalHostViewImprovedInteractor>
 
 @end
 
@@ -47,32 +47,81 @@ - (void)presentModalHostView:(RCTModalHostViewImproved *)modalHostView
     if (self.presentationBlock) {
       self.presentationBlock([modalHostView reactViewController], viewController, animated, completionBlock);
     } else {
-      [[modalHostView reactViewController] presentViewController:viewController
+      /*
+       [[modalHostView reactViewController] presentViewController:viewController
                                                         animated:animated
                                                       completion:completionBlock];
+       */
+      UIViewController* presentingViewController;
+      // pageSheet and formSheet presentation style animate the presented view so we need to use the last presented view controller
+      // For other presentation styles we use the new window
+      if (modalHostView.presentationStyle == UIModalPresentationPageSheet || modalHostView.presentationStyle == UIModalPresentationFormSheet) {
+        UIViewController *lastPresentedViewController = RCTKeyWindow().rootViewController;
+        UIViewController *presentedViewController = nil;
+        while (lastPresentedViewController != nil) {
+          presentedViewController = lastPresentedViewController;
+          lastPresentedViewController = lastPresentedViewController.presentedViewController;
+        }
+        presentingViewController = presentedViewController;
+      } else {
+        modalHostView.modalWindow = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
+        modalHostView.modalWindow.windowLevel = UIWindowLevelAlert;
+        UIViewController *newViewController = [[UIViewController alloc] init];
+        modalHostView.modalWindow.rootViewController = newViewController;
+        [modalHostView.modalWindow makeKeyAndVisible];
+        presentingViewController = newViewController;
+      }
+      [presentingViewController presentViewController:viewController animated:animated completion:completionBlock];
     }
   });
 }
 
-- (void)dismissModalHostView:(RCTModalHostViewImproved *)modalHostView
+- (void)dismissModalHostViewWithCompletion:(RCTModalHostViewImproved *)modalHostView
           withViewController:(RCTModalHostViewControllerImproved *)viewController
                     animated:(BOOL)animated
+                  completion:(void (^)(void))completion
 {
   dispatch_block_t completionBlock = ^{
     if (modalHostView.identifier) {
       [[self.bridge moduleForClass:[RCTModalManager class]] modalDismissed:modalHostView.identifier];
     }
   };
 
+  if (completion) {
+    completion();
+  }
+  modalHostView.modalWindow = nil;
+
   dispatch_async(dispatch_get_main_queue(), ^{
     if (self.dismissalBlock) {
       self.dismissalBlock([modalHostView reactViewController], viewController, animated, completionBlock);
     } else {
-      [viewController.presentingViewController dismissViewControllerAnimated:animated completion:completionBlock];
+      /*
+       [viewController.presentingViewController dismissViewControllerAnimated:animated completion:completionBlock];
+       */
+      // Will be true for pageSheet and formSheet presentation styles
+      // We dismiss the nested modal and then dismiss the current modal
+      if (viewController.presentedViewController != nil && [viewController.presentedViewController isKindOfClass:[RCTModalHostViewController class]]) {
+        RCTModalHostViewControllerImproved* presentedModalViewController = (RCTModalHostViewControllerImproved *)viewController.presentedViewController;
+        dispatch_block_t childModalCompletionBlock = ^{
+          [viewController.presentingViewController dismissViewControllerAnimated:animated completion:completionBlock];
+        };
+
+        [presentedModalViewController.modalHostView dismissModalViewControllerWithCompletion: childModalCompletionBlock];
+      } else {
+        [viewController.presentingViewController dismissViewControllerAnimated:animated completion:completionBlock];
+      }
     }
   });
 }
 
+- (void)dismissModalHostView:(RCTModalHostViewImproved *)modalHostView
+          withViewController:(RCTModalHostViewControllerImproved *)viewController
+                    animated:(BOOL)animated
+{
+  [self dismissModalHostViewWithCompletion:modalHostView withViewController:viewController animated:animated completion:nil];
+}
+
 - (void)invalidate
 {
   for (RCTModalHostView *hostView in _hostViews) {