mirror of
https://github.com/Instagram/IGListKit
synced 2026-05-09 18:40:52 +00:00
1950abad4f
Summary: Adding an example using self sizing cells (`estimatedSize` API of `UICollectionViewFlowLayout`) both in code and from cells in nibs. I assume cells in storyboards would follow the same AL design patterns as nibs, so I left out storyboards.  Fixes #149 - [x] All tests pass. Demo project builds and runs. - [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/CONTRIBUTING.md) Closes https://github.com/Instagram/IGListKit/pull/176 Differential Revision: D4156409 Pulled By: rnystrom fbshipit-source-id: b0b6d0cc8f4a575ff9963d66bc0df605843d47fe
55 lines
2.4 KiB
Swift
55 lines
2.4 KiB
Swift
/**
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Copyright (c) 2016-present, Facebook, Inc. All rights reserved.
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The examples provided by Facebook are for non-commercial testing and evaluation
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purposes only. Facebook reserves all rights not expressly granted.
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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
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FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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import UIKit
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class ManuallySelfSizingCell: UICollectionViewCell {
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let label: UILabel = {
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let label = UILabel()
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label.backgroundColor = UIColor.green.withAlphaComponent(0.1)
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label.numberOfLines = 1
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label.translatesAutoresizingMaskIntoConstraints = false
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return label
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}()
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override init(frame: CGRect) {
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super.init(frame: frame)
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contentView.backgroundColor = .white
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contentView.addSubview(label)
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NSLayoutConstraint(item: label, attribute: .top, relatedBy: .equal, toItem: contentView, attribute: .top, multiplier: 1, constant: 15).isActive = true
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NSLayoutConstraint(item: label, attribute: .leading, relatedBy: .equal, toItem: contentView, attribute: .leading, multiplier: 1, constant: 15).isActive = true
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NSLayoutConstraint(item: contentView, attribute: .bottom, relatedBy: .equal, toItem: label, attribute: .bottom, multiplier: 1, constant: 15).isActive = true
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NSLayoutConstraint(item: contentView, attribute: .trailing, relatedBy: .equal, toItem: label, attribute: .trailing, multiplier: 1, constant: 15).isActive = true
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}
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required init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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override func preferredLayoutAttributesFitting(_ layoutAttributes: UICollectionViewLayoutAttributes) -> UICollectionViewLayoutAttributes {
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setNeedsLayout()
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layoutIfNeeded()
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let size = contentView.systemLayoutSizeFitting(layoutAttributes.size)
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var newFrame = layoutAttributes.frame
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newFrame.size.width = ceil(size.width)
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newFrame.size.height = ceil(size.height)
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layoutAttributes.frame = newFrame
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return layoutAttributes
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}
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}
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