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67 lines
2.2 KiB
Objective-C
67 lines
2.2 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/POPPropertyAnimation.h>
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/**
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@abstract A concrete decay animation class.
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@discussion Animation is achieved through gradual decay of animation value.
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*/
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@interface POPDecayAnimation : POPPropertyAnimation
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/**
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@abstract The designated initializer.
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@returns An instance of a decay animation.
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*/
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+ (instancetype)animation;
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/**
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@abstract Convenience initializer that returns an animation with animatable property of name.
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@param name The name of the animatable property.
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@returns An instance of a decay animation configured with specified animatable property.
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*/
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+ (instancetype)animationWithPropertyNamed:(NSString *)name;
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/**
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@abstract The current velocity value.
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@discussion Set before animation start to account for initial velocity. Expressed in change of value units per second. The only POPValueTypes supported for velocity are: kPOPValuePoint, kPOPValueInteger, kPOPValueFloat, kPOPValueRect, and kPOPValueSize.
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*/
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@property (copy, nonatomic) id velocity;
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/**
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@abstract The original velocity value.
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@discussion Since the velocity property is modified as the animation progresses, this property stores the original, passed in velocity to support autoreverse and repeatCount.
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*/
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@property (copy, nonatomic, readonly) id originalVelocity;
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/**
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@abstract The deceleration factor.
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@discussion Values specifies should be in the range [0, 1]. Lower values results in faster deceleration. Defaults to 0.998.
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*/
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@property (assign, nonatomic) CGFloat deceleration;
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/**
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@abstract The expected duration.
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@discussion Derived based on input velocity and deceleration values.
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*/
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@property (readonly, assign, nonatomic) CFTimeInterval duration;
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/**
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The to value is derived based on input velocity and deceleration.
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*/
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- (void)setToValue:(id)toValue NS_UNAVAILABLE;
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/**
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@abstract The reversed velocity.
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@discussion The reversed velocity based on the originalVelocity when the animation was set up.
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*/
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- (id)reversedVelocity;
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@end
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