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Instance Methods | Properties | List of all members
FlutterTouchInterceptingView Class Reference

`#import <FlutterPlatformViews_Internal.h>`

Inheritance diagram for FlutterTouchInterceptingView:

## Instance Methods
(instancetype) | - initWithEmbeddedView:platformViewsController:gestureRecognizersBlockingPolicy:
(void) | - releaseGesture
(void) | - blockGesture
(UIView *) | - embeddedView
(id) | - accessibilityContainer

## Properties
id | flutterAccessibilityContainer

## Detailed Description

Definition at line 138 of file FlutterPlatformViews_Internal.h.

## Method Documentation

## ◆ accessibilityContainer

- (id) accessibilityContainer |  |  |

Provided by category FlutterTouchInterceptingView(Tests).

## ◆ blockGesture

- (void) blockGesture |  |  |

Definition at line 571 of file FlutterPlatformViews_Internal.mm.

571 {
572 switch (_blockingPolicy) {
573 case FlutterPlatformViewGestureRecognizersBlockingPolicyEager:
574 // We block all other gesture recognizers immediately in this policy.
575 self.delayingRecognizer.state = UIGestureRecognizerStateEnded;
576
577 // On iOS 18.2, WKWebView's internal recognizer likely caches the old state of its blocking
578 // recognizers (i.e. delaying recognizer), resulting in non-tappable links. See
579 // https://github.com/flutter/flutter/issues/158961. Removing and adding back the delaying
580 // recognizer solves the problem, possibly because UIKit notifies all the recognizers related
581 // to (blocking or blocked by) this recognizer. It is not possible to inject this workaround
582 // from the web view plugin level. Right now we only observe this issue for
583 // FlutterPlatformViewGestureRecognizersBlockingPolicyEager, but we should try it if a similar
584 // issue arises for the other policy.
585 if (@available(iOS 18.2, *)) {
586 // This workaround is designed for WKWebView only. The 1P web view plugin provides a
587 // WKWebView itself as the platform view. However, some 3P plugins provide wrappers of
588 // WKWebView instead. So we perform DFS to search the view hierarchy (with a depth limit).
589 // Passing a limit of 0 means only searching for platform view itself; Pass 1 to include its
590 // children as well, and so on. We should be conservative and start with a small number. The
591 // AdMob banner has a WKWebView at depth 7.
592 if ([self containsWebView:self.embeddedView remainingSubviewDepth:1]) {
593 [self removeGestureRecognizer:self.delayingRecognizer];
594 [self addGestureRecognizer:self.delayingRecognizer];
595 }
596 }
597
598 break;
599 case FlutterPlatformViewGestureRecognizersBlockingPolicyWaitUntilTouchesEnded:
600 if (self.delayingRecognizer.touchedEndedWithoutBlocking) {
601 // If touchesEnded of the `DelayingGesureRecognizer` has been already invoked,
602 // we want to set the state of the `DelayingGesureRecognizer` to
603 // `UIGestureRecognizerStateEnded` as soon as possible.
604 self.delayingRecognizer.state = UIGestureRecognizerStateEnded;
605 } else {
606 // If touchesEnded of the `DelayingGesureRecognizer` has not been invoked,
607 // We will set a flag to notify the `DelayingGesureRecognizer` to set the state to
608 // `UIGestureRecognizerStateEnded` when touchesEnded is called.
609 self.delayingRecognizer.shouldEndInNextTouchesEnded = YES;
610 }
611 break;
612 default:
613 break;
614 }
615 }

References embeddedView, FlutterPlatformViewGestureRecognizersBlockingPolicyEager, and FlutterPlatformViewGestureRecognizersBlockingPolicyWaitUntilTouchesEnded.

## ◆ embeddedView

- (UIView*) embeddedView |  |  |

Referenced by blockGesture, and initWithEmbeddedView:platformViewsController:gestureRecognizersBlockingPolicy:.

## ◆ initWithEmbeddedView:platformViewsController:gestureRecognizersBlockingPolicy:

- (instancetype) initWithEmbeddedView: |  | (UIView*) | embeddedView
platformViewsController: |  | (fml::WeakPtr<flutter::PlatformViewsController>) | platformViewsController
gestureRecognizersBlockingPolicy: |  | (FlutterPlatformViewGestureRecognizersBlockingPolicy) | blockingPolicy

Definition at line 522 of file FlutterPlatformViews_Internal.mm.

522 :(UIView*)embeddedView
523 platformViewsController:
524 (fml::WeakPtr<flutter::PlatformViewsController>)platformViewsController
525 gestureRecognizersBlockingPolicy:
526 (FlutterPlatformViewGestureRecognizersBlockingPolicy)blockingPolicy {
527 self = [super initWithFrame:embeddedView.frame];
528 if (self) {
529 self.multipleTouchEnabled = YES;
530 _embeddedView = embeddedView;
531 embeddedView.autoresizingMask =
532 (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
533
534 [self addSubview:embeddedView];
535
536 ForwardingGestureRecognizer* forwardingRecognizer =
537 [[ForwardingGestureRecognizer alloc] initWithTarget:self
538 platformViewsController:platformViewsController];
539
540 _delayingRecognizer =
541 [[FlutterDelayingGestureRecognizer alloc] initWithTarget:self
542 action:nil
543 forwardingRecognizer:forwardingRecognizer];
544 _blockingPolicy = blockingPolicy;
545
546 [self addGestureRecognizer:_delayingRecognizer];
547 [self addGestureRecognizer:forwardingRecognizer];
548 }
549 return self;
550 }

References embeddedView.

## ◆ releaseGesture

- (void) releaseGesture |  |  |

Definition at line 552 of file FlutterPlatformViews_Internal.mm.

552 {
553 self.delayingRecognizer.state = UIGestureRecognizerStateFailed;
554 }

## Property Documentation

## ◆ flutterAccessibilityContainer

- (id) flutterAccessibilityContainer
| read write nonatomic retain

Definition at line 155 of file FlutterPlatformViews_Internal.h.

The documentation for this class was generated from the following files:

- shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.h
- shell/platform/darwin/ios/framework/Source/FlutterPlatformViews_Internal.mm

-[FlutterTouchInterceptingView embeddedView]
UIView * embeddedView()
FlutterPlatformViewGestureRecognizersBlockingPolicyWaitUntilTouchesEnded
@ FlutterPlatformViewGestureRecognizersBlockingPolicyWaitUntilTouchesEnded
Definition: FlutterPlugin.h:269
FlutterDelayingGestureRecognizer
Definition: FlutterPlatformViews_Internal.h:169
ForwardingGestureRecognizer
Definition: FlutterPlatformViews_Internal.h:196
FlutterPlatformViewGestureRecognizersBlockingPolicyEager
@ FlutterPlatformViewGestureRecognizersBlockingPolicyEager
Definition: FlutterPlugin.h:261
FlutterPlatformViewGestureRecognizersBlockingPolicy
FlutterPlatformViewGestureRecognizersBlockingPolicy
Definition: FlutterPlugin.h:252