TableViewCellWithAutoLayoutiOS8/TableViewCellWithAutoLayout/TableViewController/TableViewCell.swift at master · Ithoughts/TableViewCellWithAutoLayoutiOS8 · GitHub

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//
//  TableViewCell.swift
//  TableViewCellWithAutoLayout
//
//  Copyright (c) 2014 Tyler Fox
//

import UIKit

class TableViewCell: UITableViewCell
{
    // The CGFloat type annotation is necessary for these constants because they are passed as arguments to bridged Objective-C methods,
    // and without making the type explicit these will be inferred to be type Double which is not compatible.
    let kLabelHorizontalInsets: CGFloat = 15.0
    let kLabelVerticalInsets: CGFloat = 10.0

    var didSetupConstraints = false

    var titleLabel: UILabel = UILabel.newAutoLayoutView()
    var bodyLabel: UILabel = UILabel.newAutoLayoutView()

    override init(style: UITableViewCellStyle, reuseIdentifier: String!)
    {
        super.init(style: style, reuseIdentifier: reuseIdentifier)

        setupViews()
    }

    required init(coder aDecoder: NSCoder)
    {
        super.init(coder: aDecoder)

        setupViews()
    }

    func setupViews()
    {
        titleLabel.lineBreakMode = .ByTruncatingTail
        titleLabel.numberOfLines = 1
        titleLabel.textAlignment = .Left
        titleLabel.textColor = UIColor.blackColor()
        titleLabel.backgroundColor = UIColor(red: 0, green: 0, blue: 1, alpha: 0.1) // light blue

        bodyLabel.lineBreakMode = .ByTruncatingTail
        bodyLabel.numberOfLines = 0
        bodyLabel.textAlignment = .Left
        bodyLabel.textColor = UIColor.darkGrayColor()
        bodyLabel.backgroundColor = UIColor(red: 1, green: 0, blue: 0, alpha: 0.1) // light red

        updateFonts()

        contentView.addSubview(titleLabel)
        contentView.addSubview(bodyLabel)

        contentView.backgroundColor = UIColor(red: 0, green: 1, blue: 0, alpha: 0.1) // light green
    }

    override func updateConstraints()
    {
        if !didSetupConstraints {
            // Note: if the constraints you add below require a larger cell size than the current size (which is likely to be the default size {320, 44}), you'll get an exception.
            // As a fix, you can temporarily increase the size of the cell's contentView so that this does not occur using code similar to the line below.
            //      See here for further discussion: https://github.com/Alex311/TableCellWithAutoLayout/commit/bde387b27e33605eeac3465475d2f2ff9775f163#commitcomment-4633188
            // contentView.bounds = CGRect(x: 0.0, y: 0.0, width: 99999.0, height: 99999.0)

            // Prevent the two UILabels from being compressed below their intrinsic content height
            // FIXME 7-Jun-14 Xcode 6b1: Apple Bug Report rdar://17220525: The UILayoutPriority enum is not compatible with Swift yet!
            // As a temporary workaround, we're using the raw value of UILayoutPriorityRequired = 1000
            UIView.autoSetPriority(1000) {
                self.titleLabel.autoSetContentCompressionResistancePriorityForAxis(.Vertical)
                self.bodyLabel.autoSetContentCompressionResistancePriorityForAxis(.Vertical)
            }

            titleLabel.autoPinEdgeToSuperviewEdge(.Top, withInset: kLabelVerticalInsets)
            titleLabel.autoPinEdgeToSuperviewEdge(.Leading, withInset: kLabelHorizontalInsets)
            titleLabel.autoPinEdgeToSuperviewEdge(.Trailing, withInset: kLabelHorizontalInsets)

            // This constraint is an inequality so that if the cell is slightly taller than actually required, extra space will go here
            bodyLabel.autoPinEdge(.Top, toEdge: .Bottom, ofView: titleLabel, withOffset: 10.0, relation: .GreaterThanOrEqual)

            bodyLabel.autoPinEdgeToSuperviewEdge(.Leading, withInset: kLabelHorizontalInsets)
            bodyLabel.autoPinEdgeToSuperviewEdge(.Trailing, withInset: kLabelHorizontalInsets)
            bodyLabel.autoPinEdgeToSuperviewEdge(.Bottom, withInset: kLabelVerticalInsets)

            didSetupConstraints = true
        }

        super.updateConstraints()
    }

    func updateFonts()
    {
        titleLabel.font = UIFont.preferredFontForTextStyle(UIFontTextStyleHeadline)
        bodyLabel.font = UIFont.preferredFontForTextStyle(UIFontTextStyleCaption2)
    }
}