HuggingAndCompression.swift

//
//  ViewController.swift
//  PullDownSample
//
//  Created by Dinesh Kumar on 15/08/16.
//  Copyright © 2016 Organization. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    lazy var primaryLabel : UILabel = {
        let primaryLabel = UILabel()
        primaryLabel.text = "Product"
        primaryLabel.font = UIFont.systemFontOfSize(18.0, weight: UIFontWeightMedium)
        primaryLabel.textColor = UIColor.init(white: 0.1, alpha: 1.0)
        primaryLabel.backgroundColor = UIColor.init(white: 0.9, alpha: 0.5)
        primaryLabel.translatesAutoresizingMaskIntoConstraints = false
        primaryLabel.setContentHuggingPriority(UILayoutPriorityDefaultLow, forAxis:.Horizontal)
        primaryLabel.setContentCompressionResistancePriority(UILayoutPriorityDefaultLow, forAxis: .Horizontal)
        return primaryLabel
    }()
    
    func addPrimaryLabelWithConstraints() {
        self.view.addSubview(primaryLabel)
        primaryLabel.topAnchor.constraintEqualToAnchor(self.view.layoutMarginsGuide.topAnchor, constant: 30.0).active = true
        primaryLabel.leadingAnchor.constraintEqualToAnchor(self.view.layoutMarginsGuide.leadingAnchor, constant: 0.0).active = true
    }
    
    lazy var secondaryLabel : UILabel = {
        let secondaryLabel = UILabel()
        secondaryLabel.text = "Product_Name"
        secondaryLabel.font = UIFont.systemFontOfSize(18.0, weight: UIFontWeightThin)
        secondaryLabel.textColor = UIColor.init(white: 0.4, alpha: 1.0)
        secondaryLabel.backgroundColor = UIColor.init(white: 0.9, alpha: 0.5)
        secondaryLabel.translatesAutoresizingMaskIntoConstraints = false
        secondaryLabel.setContentHuggingPriority(UILayoutPriorityDefaultHigh, forAxis:.Horizontal)
        secondaryLabel.setContentCompressionResistancePriority(UILayoutPriorityDefaultHigh, forAxis: .Horizontal)
        return secondaryLabel
    }()
    
    func addSecondaryLabelWithConstraints() {
        self.view.addSubview(secondaryLabel)
        secondaryLabel.topAnchor.constraintEqualToAnchor(self.view.layoutMarginsGuide.topAnchor, constant: 30.0).active = true
        secondaryLabel.trailingAnchor.constraintEqualToAnchor(self.view.layoutMarginsGuide.trailingAnchor, constant: 0.0).active = true
    }
    
    func addConstraintsBetweenLabels() {
        secondaryLabel.leadingAnchor.constraintEqualToAnchor(primaryLabel.trailingAnchor, constant: 8.0).active = true
    }
    
    func updateProductName(name productName: String) {
        secondaryLabel.text = productName
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        addPrimaryLabelWithConstraints()
        addSecondaryLabelWithConstraints()
        addConstraintsBetweenLabels()
        updateProductName(name: "Apple Macbook Pro - Retina")
    }
    
    override func prefersStatusBarHidden() -> Bool {
        return false
    }
}