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git-subtree-dir: submodules/LegacyComponents git-subtree-mainline: 608630530451e02e5aec48389d144dbf7a3625b9 git-subtree-split: d5594346161c1b7f203d1e87068bbe77bcaac019
47 lines
1.8 KiB
Objective-C
47 lines
1.8 KiB
Objective-C
/**
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Copyright (c) 2014-present, Facebook, Inc.
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All rights reserved.
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This source code is licensed under the BSD-style license found in the
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LICENSE file in the root directory of this source tree. An additional grant
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of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import <LegacyComponents/POPAnimation.h>
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@class POPCustomAnimation;
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/**
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@abstract POPCustomAnimationBlock is the callback block of a custom animation.
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@discussion This block will be executed for each animation frame and should update the property or properties being animated based on current timing.
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@param target The object being animated. Reference the passed in target to help avoid retain loops.
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@param animation The custom animation instance. Use to determine the current and elapsed time since last callback. Reference the passed in animation to help avoid retain loops.
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@return Flag indicating whether the animation should continue animating. Return NO to indicate animation is done.
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*/
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typedef BOOL (^POPCustomAnimationBlock)(id target, POPCustomAnimation *animation);
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/**
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@abstract POPCustomAnimation is a concrete animation subclass for custom animations.
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*/
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@interface POPCustomAnimation : POPAnimation
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/**
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@abstract Creates and returns an initialized custom animation instance.
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@discussion This is the designated initializer.
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@param block The custom animation callback block. See {@ref POPCustomAnimationBlock}.
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@return The initialized custom animation instance.
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*/
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+ (instancetype)animationWithBlock:(POPCustomAnimationBlock)block;
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/**
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@abstract The current animation time at time of callback.
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*/
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@property (readonly, nonatomic) CFTimeInterval currentTime;
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/**
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@abstract The elapsed animation time since last callback.
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*/
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@property (readonly, nonatomic) CFTimeInterval elapsedTime;
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@end
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