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iOS: Fix Animated image crash when CADisplayLink target in RCTWeakPro…
…xy is nil Summary: ## Problem When self is nil, this may crash in RCTUIImageViewAnimated.m. ``` _displayLink = [CADisplayLink displayLinkWithTarget:[RCTWeakProxy weakProxyWithTarget:self] selector:selector(displayDidRefresh:)]; ``` ## Fix Replace `RCTWeakProxy` with a concrete class `RCTDisplayWeakRefreshable` that has the displayDidRefresh method, that calls the displayDidRefresh method in its weak target. ### Original Github Issue #28070 (comment) Changelog: [iOS] [Fixed] - Fix Animated image crash when CADisplayLink target in RCTWeakProxy is nil Reviewed By: shergin Differential Revision: D21419385 fbshipit-source-id: da7c3c38f81ea54f633da7f59359e07680ea2faf
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| /* | ||
| * Copyright (c) Facebook, Inc. and its affiliates. | ||
| * | ||
| * This source code is licensed under the MIT license found in the | ||
| * LICENSE file in the root directory of this source tree. | ||
| */ | ||
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| #import <Foundation/Foundation.h> | ||
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| @protocol RCTDisplayRefreshable | ||
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| - (void)displayDidRefresh:(CADisplayLink *)displayLink; | ||
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| @end | ||
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| @interface RCTDisplayWeakRefreshable : NSObject | ||
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| @property (nonatomic, weak) id<RCTDisplayRefreshable> refreshable; | ||
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| + (CADisplayLink *)displayLinkWithWeakRefreshable:(id<RCTDisplayRefreshable>)refreshable; | ||
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| @end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| /* | ||
| * Copyright (c) Facebook, Inc. and its affiliates. | ||
| * | ||
| * This source code is licensed under the MIT license found in the | ||
| * LICENSE file in the root directory of this source tree. | ||
| */ | ||
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| #import "RCTDisplayWeakRefreshable.h" | ||
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| @implementation RCTDisplayWeakRefreshable | ||
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| + (CADisplayLink *)displayLinkWithWeakRefreshable:(id<RCTDisplayRefreshable>)refreshable { | ||
| RCTDisplayWeakRefreshable *target = [[RCTDisplayWeakRefreshable alloc] initWithRefreshable:refreshable]; | ||
| return [CADisplayLink displayLinkWithTarget:target selector:@selector(displayDidRefresh:)]; | ||
| } | ||
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| - (instancetype)initWithRefreshable:(id<RCTDisplayRefreshable>)refreshable | ||
| { | ||
| if (self = [super init]) { | ||
| _refreshable = refreshable; | ||
| } | ||
| return self; | ||
| } | ||
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| - (void)displayDidRefresh:(CADisplayLink *)displayLink { | ||
| [_refreshable displayDidRefresh:displayLink]; | ||
| } | ||
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| @end |
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