IGListKit/Examples/Examples-tvOS/IGListKitExamples/Views/LabelCell.swift
Ryan Nystrom f7220b5cfe Update example project files, convert to Swift 4, and fix errors
Summary:
Used migration tool with Swift 4, fixed build errors, and killed all warnings. Only non-trivial change was in the macOS example. Will flag that one.

No changelog needed for this, right?

- [x] All tests pass. Demo project builds and runs.
Closes https://github.com/Instagram/IGListKit/pull/941

Differential Revision: D5890505

Pulled By: rnystrom

fbshipit-source-id: 7e0d3510ff0e5856a0ffd59f1a97548a72266c20
2017-09-22 06:55:23 -07:00

63 lines
2.4 KiB
Swift

/**
Copyright (c) 2016-present, Facebook, Inc. All rights reserved.
The examples provided by Facebook are for non-commercial testing and evaluation
purposes only. Facebook reserves all rights not expressly granted.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
import UIKit
final class LabelCell: UICollectionViewCell {
fileprivate static let insets = UIEdgeInsets(top: 8, left: 15, bottom: 8, right: 15)
fileprivate static let font = UIFont.systemFont(ofSize: 40)
static var singleLineHeight: CGFloat {
return font.lineHeight + insets.top + insets.bottom
}
static func textHeight(_ text: String, width: CGFloat) -> CGFloat {
let constrainedSize = CGSize(width: width - insets.left - insets.right, height: CGFloat.greatestFiniteMagnitude)
let attributes = [ NSAttributedStringKey.font: font ]
let options: NSStringDrawingOptions = [.usesFontLeading, .usesLineFragmentOrigin]
let bounds = (text as NSString).boundingRect(with: constrainedSize, options: options, attributes: attributes, context: nil)
return ceil(bounds.height) + insets.top + insets.bottom
}
lazy var label: UILabel = {
let label = UILabel()
label.backgroundColor = .clear
label.numberOfLines = 1
label.font = LabelCell.font
self.contentView.addSubview(label)
return label
}()
lazy var separator: CALayer = {
let layer = CALayer()
layer.backgroundColor = UIColor(red: 200/255.0, green: 199/255.0, blue: 204/255.0, alpha: 1).cgColor
self.contentView.layer.addSublayer(layer)
return layer
}()
override func layoutSubviews() {
super.layoutSubviews()
let bounds = contentView.bounds
label.frame = UIEdgeInsetsInsetRect(bounds, LabelCell.insets)
let height: CGFloat = 0.5
let left = LabelCell.insets.left
separator.frame = CGRect(x: left, y: bounds.height - height, width: bounds.width - left, height: height)
}
override var canBecomeFocused: Bool {
return false
}
}