mirror of
https://github.com/MessageKit/MessageKit.git
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zhongwuzw
49 lines
1.8 KiB
Swift
49 lines
1.8 KiB
Swift
/*
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MIT License
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Copyright (c) 2017-2018 MessageKit
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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import UIKit
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/// An object is responsible for
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/// sizing and configuring cells for given `IndexPath`s.
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open class CellSizeCalculator {
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/// The layout object for which the cell size calculator is used.
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public weak var layout: UICollectionViewFlowLayout?
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/// Used to configure the layout attributes for a given cell.
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///
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/// - Parameters:
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/// - attributes: The attributes of the cell.
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/// The default does nothing
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open func configure(attributes: UICollectionViewLayoutAttributes) {}
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/// Used to size an item at a given `IndexPath`.
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///
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/// - Parameters:
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/// - indexPath: The `IndexPath` of the item to be displayed.
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/// The default return .zero
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open func sizeForItem(at indexPath: IndexPath) -> CGSize { return .zero }
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}
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