mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Valentin Shergin
97d6f2e6a9
Summary: Historically, `UIScrollView`s in React Native do not cancel touches started on `UIControl`-based views (as normal iOS `UIScrollView`s do). This diff implements this behavior. Changelog: [Internal] Fabric-specific internal change. Reviewed By: JoshuaGross Differential Revision: D24661106 fbshipit-source-id: 1fb98d62f9e1528f11e7699d460aaefcec534e97
58 lines
2.2 KiB
Objective-C
58 lines
2.2 KiB
Objective-C
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import <UIKit/UIKit.h>
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#import <React/RCTGenericDelegateSplitter.h>
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#import <React/RCTViewComponentView.h>
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NS_ASSUME_NONNULL_BEGIN
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/*
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* Many `UIScrollView` customizations normally require creating a subclass which is not always convenient.
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* `RCTEnhancedScrollView` has a delegate (conforming to this protocol) that allows customizing such behaviors without
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* creating a subclass.
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*/
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@protocol RCTEnhancedScrollViewOverridingDelegate <NSObject>
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- (BOOL)touchesShouldCancelInContentView:(UIView *)view;
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@end
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/*
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* `UIScrollView` subclass which has some improvements and tweaks
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* which are not directly related to React Native.
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*/
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@interface RCTEnhancedScrollView : UIScrollView
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/*
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* Returns a delegate splitter that can be used to create as many `UIScrollView` delegates as needed.
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* Use that instead of accessing `delegate` property directly.
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*
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* This class overrides the `delegate` property and wires that to the delegate splitter.
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*
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* We never know which another part of the app might introspect the view hierarchy and mess with `UIScrollView`'s
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* delegate, so we expose a fake delegate connected to the original one via the splitter to make the component as
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* resilient to other code as possible: even if something else nil the delegate, other delegates that were subscribed
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* via the splitter will continue working.
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*/
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@property (nonatomic, strong, readonly) RCTGenericDelegateSplitter<id<UIScrollViewDelegate>> *delegateSplitter;
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@property (nonatomic, weak) id<RCTEnhancedScrollViewOverridingDelegate> overridingDelegate;
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@property (nonatomic, assign) BOOL pinchGestureEnabled;
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@property (nonatomic, assign) BOOL centerContent;
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@property (nonatomic, assign) CGFloat snapToInterval;
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@property (nonatomic, copy) NSString *snapToAlignment;
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@property (nonatomic, assign) BOOL disableIntervalMomentum;
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@property (nonatomic, assign) BOOL snapToStart;
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@property (nonatomic, assign) BOOL snapToEnd;
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@property (nonatomic, copy) NSArray<NSNumber *> *snapToOffsets;
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@end
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NS_ASSUME_NONNULL_END
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