react-native/React/Modules/RCTUIManager.h

116 lines
3.5 KiB
Objective-C

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import <UIKit/UIKit.h>
#import "RCTBridge.h"
#import "RCTBridgeModule.h"
#import "RCTInvalidating.h"
#import "RCTViewManager.h"
/**
* Posted right before re-render happens. This is a chance for views to invalidate their state so
* next render cycle will pick up updated views and layout appropriately.
*/
RCT_EXTERN NSString *const RCTUIManagerWillUpdateViewsDueToContentSizeMultiplierChangeNotification;
/**
* Posted whenever a new root view is registered with RCTUIManager. The userInfo property
* will contain a RCTUIManagerRootViewKey with the registered root view.
*/
RCT_EXTERN NSString *const RCTUIManagerDidRegisterRootViewNotification;
/**
* Posted whenever a root view is removed from the RCTUIManager. The userInfo property
* will contain a RCTUIManagerRootViewKey with the removed root view.
*/
RCT_EXTERN NSString *const RCTUIManagerDidRemoveRootViewNotification;
/**
* Key for the root view property in the above notifications
*/
RCT_EXTERN NSString *const RCTUIManagerRootViewKey;
@protocol RCTScrollableProtocol;
/**
* The RCTUIManager is the module responsible for updating the view hierarchy.
*/
@interface RCTUIManager : NSObject <RCTBridgeModule, RCTInvalidating>
/**
* Register a root view with the RCTUIManager.
*/
- (void)registerRootView:(UIView *)rootView;
/**
* Gets the view associated with a reactTag.
*/
- (UIView *)viewForReactTag:(NSNumber *)reactTag;
/**
* Update the frame of a view. This might be in response to a screen rotation
* or some other layout event outside of the React-managed view hierarchy.
*/
- (void)setFrame:(CGRect)frame forView:(UIView *)view;
/**
* Set the natural size of a view, which is used when no explicit size is set.
* Use UIViewNoIntrinsicMetric to ignore a dimension.
*/
- (void)setIntrinsicContentSize:(CGSize)size forView:(UIView *)view;
/**
* Update the background color of a view. The source of truth for
* backgroundColor is the shadow view, so if to update backgroundColor from
* native code you will need to call this method.
*/
- (void)setBackgroundColor:(UIColor *)color forView:(UIView *)view;
/**
* Schedule a block to be executed on the UI thread. Useful if you need to execute
* view logic after all currently queued view updates have completed.
*/
- (void)addUIBlock:(RCTViewManagerUIBlock)block;
/**
* The view that is currently first responder, according to the JS context.
*/
+ (UIView *)JSResponder;
/**
* Normally, UI changes are not applied until the complete batch of method
* invocations from JavaScript to native has completed.
*
* Setting this to YES will flush UI changes sooner, which could potentially
* result in inconsistent UI updates.
*
* The default is NO (recommended).
*/
@property (atomic, assign) BOOL unsafeFlushUIChangesBeforeBatchEnds;
/**
* In some cases we might want to trigger layout from native side.
* React won't be aware of this, so we need to make sure it happens.
*/
- (void)setNeedsLayout;
@end
/**
* This category makes the current RCTUIManager instance available via the
* RCTBridge, which is useful for RCTBridgeModules or RCTViewManagers that
* need to access the RCTUIManager.
*/
@interface RCTBridge (RCTUIManager)
@property (nonatomic, readonly) RCTUIManager *uiManager;
@end