/*

    Copyright (C) 2017 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    A `UIView` subclass that is used to add a custom title to the text input screens for `UITextField`s.

*/

import UIKit

class CustomInputAccessoryView: UIView {

    // MARK: Properties

    let titleLabel = UILabel(frame: CGRect.zero)

    // MARK: Initialization

    init(title: String) {

        /*

            Call the designated initializer with an inital zero frame. The final

            frame will be determined by the layout constraints added later.

        */

        super.init(frame: CGRect.zero)

        // Setup the label and add it to the view.

        titleLabel.font = UIFont.systemFont(ofSize: 60, weight: UIFontWeightMedium)

        titleLabel.text = title

        addSubview(titleLabel)

        /*

            Turn off automatic transaltion of resizing masks into constraints as

            we'll be specifying our own layout constraints.

        */

        translatesAutoresizingMaskIntoConstraints = false

        titleLabel.translatesAutoresizingMaskIntoConstraints = false

        /*

            Add layout constraints to the label that specifies it must fill the

            containing view with an additional 60pts of bottom padding.

        */

        let viewsDictionary = ["titleLabel": titleLabel]

        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-[titleLabel]-|", options: [], metrics: nil, views: viewsDictionary))

        addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-[titleLabel]-60-|", options: [], metrics: nil, views: viewsDictionary))

    }

    required init?(coder aDecoder: NSCoder) {

        fatalError("init(coder:) has not been implemented.")

    }

}