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44 lines
1.0 KiB
Objective-C
44 lines
1.0 KiB
Objective-C
//
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// ASRatioLayoutSpec.h
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// AsyncDisplayKit
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//
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// Copyright (c) 2014-present, Facebook, Inc. 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 <AsyncDisplayKit/ASLayoutSpec.h>
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NS_ASSUME_NONNULL_BEGIN
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@protocol ASLayoutElement;
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/**
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Ratio layout spec
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For when the content should respect a certain inherent ratio but can be scaled (think photos or videos)
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The ratio passed is the ratio of height / width you expect
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For a ratio 0.5, the spec will have a flat rectangle shape
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_ _ _ _
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For a ratio 2.0, the spec will be twice as tall as it is wide
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_ _
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**/
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@interface ASRatioLayoutSpec : ASLayoutSpec
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@property (nonatomic, assign) CGFloat ratio;
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+ (instancetype)ratioLayoutSpecWithRatio:(CGFloat)ratio child:(id<ASLayoutElement>)child AS_WARN_UNUSED_RESULT;
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@end
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NS_ASSUME_NONNULL_END
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