142 lines
5.2 KiB
Swift
142 lines
5.2 KiB
Swift
//
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// GridCollectionViewCell.swift
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// Delta
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//
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// Created by Riley Testut on 10/21/15.
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// Copyright © 2015 Riley Testut. All rights reserved.
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//
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import UIKit
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class GridCollectionViewCell: UICollectionViewCell
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{
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let imageView = UIImageView()
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let textLabel = UILabel()
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var maximumImageSize: CGSize = CGSize(width: 100, height: 100) {
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didSet {
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self.updateMaximumImageSize()
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}
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}
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private var imageViewWidthConstraint: NSLayoutConstraint!
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private var imageViewHeightConstraint: NSLayoutConstraint!
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private var textLabelBottomAnchorConstraint: NSLayoutConstraint!
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private var textLabelVerticalSpacingConstraint: NSLayoutConstraint!
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private var textLabelFocusedVerticalSpacingConstraint: NSLayoutConstraint?
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override init(frame: CGRect)
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{
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super.init(frame: frame)
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self.configureSubviews()
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}
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required init?(coder aDecoder: NSCoder)
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{
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super.init(coder: aDecoder)
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self.configureSubviews()
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}
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private func configureSubviews()
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{
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// Fix super annoying Unsatisfiable Constraints message in debugger by setting autoresizingMask
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self.contentView.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]
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self.clipsToBounds = false
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self.contentView.clipsToBounds = false
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self.imageView.translatesAutoresizingMaskIntoConstraints = false
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self.imageView.contentMode = .ScaleAspectFit
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#if os(tvOS)
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self.imageView.adjustsImageWhenAncestorFocused = true
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#endif
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self.contentView.addSubview(self.imageView)
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self.textLabel.translatesAutoresizingMaskIntoConstraints = false
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self.textLabel.font = UIFont.boldSystemFontOfSize(12)
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self.textLabel.textAlignment = .Center
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self.textLabel.numberOfLines = 0
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self.contentView.addSubview(self.textLabel)
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// Auto Layout
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self.imageView.topAnchor.constraintEqualToAnchor(self.contentView.topAnchor).active = true
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self.imageView.centerXAnchor.constraintEqualToAnchor(self.contentView.centerXAnchor).active = true
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self.imageViewWidthConstraint = self.imageView.widthAnchor.constraintEqualToConstant(self.maximumImageSize.width)
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self.imageViewWidthConstraint.active = true
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self.imageViewHeightConstraint = self.imageView.heightAnchor.constraintEqualToConstant(self.maximumImageSize.height)
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self.imageViewHeightConstraint.active = true
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self.textLabel.trailingAnchor.constraintEqualToAnchor(self.contentView.trailingAnchor).active = true
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self.textLabel.leadingAnchor.constraintEqualToAnchor(self.contentView.leadingAnchor).active = true
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self.textLabelBottomAnchorConstraint = self.textLabel.bottomAnchor.constraintEqualToAnchor(self.contentView.bottomAnchor)
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self.textLabelBottomAnchorConstraint.active = true
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self.textLabelVerticalSpacingConstraint = self.textLabel.topAnchor.constraintEqualToAnchor(self.imageView.bottomAnchor)
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self.textLabelVerticalSpacingConstraint.active = true
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#if os(tvOS)
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self.textLabelVerticalSpacingConstraint.active = false
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self.textLabelFocusedVerticalSpacingConstraint = self.textLabel.topAnchor.constraintEqualToAnchor(self.imageView.focusedFrameGuide.bottomAnchor, constant: 0)
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self.textLabelFocusedVerticalSpacingConstraint?.active = true
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#else
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self.textLabelVerticalSpacingConstraint.active = true
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#endif
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self.updateMaximumImageSize()
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}
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override func didUpdateFocusInContext(context: UIFocusUpdateContext, withAnimationCoordinator coordinator: UIFocusAnimationCoordinator)
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{
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super.didUpdateFocusInContext(context, withAnimationCoordinator: coordinator)
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coordinator.addCoordinatedAnimations({
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if context.nextFocusedView == self
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{
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self.textLabelBottomAnchorConstraint?.active = false
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self.textLabelVerticalSpacingConstraint.active = false
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self.textLabelFocusedVerticalSpacingConstraint?.active = true
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self.textLabel.textColor = UIColor.whiteColor()
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}
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else
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{
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self.textLabelFocusedVerticalSpacingConstraint?.active = false
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self.textLabelBottomAnchorConstraint?.active = true
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self.textLabelVerticalSpacingConstraint.active = true
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self.textLabel.textColor = UIColor.blackColor()
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}
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self.layoutIfNeeded()
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}, completion: nil)
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}
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}
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private extension GridCollectionViewCell
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{
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func updateMaximumImageSize()
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{
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self.imageViewWidthConstraint.constant = self.maximumImageSize.width
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self.imageViewHeightConstraint.constant = self.maximumImageSize.height
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self.textLabelVerticalSpacingConstraint.constant = 8
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self.textLabelFocusedVerticalSpacingConstraint?.constant = self.maximumImageSize.height / 10.0
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}
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} |