SheetImagePicker/SheetImagePickerTest/ViewController.swift

//
//  ViewController.swift
//  SheetImagePickerTest
//
//  Created by Shadowfacts on 9/23/19.
//  Copyright © 2019 Shadowfacts. All rights reserved.
//

import UIKit
import SheetImagePicker

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        let content = UIViewController()
        content.view.translatesAutoresizingMaskIntoConstraints = false
        content.view.backgroundColor = .red
        let sheet = SheetContainerViewController(content: content)
        sheet.delegate = self
        sheet.detents = [.bottom, .middle, .top]
        sheet.view.backgroundColor = .blue
        
        addChild(sheet)
        sheet.didMove(toParent: self)
        view.addSubview(sheet.view)
        NSLayoutConstraint.activate([
            sheet.view.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            sheet.view.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            sheet.view.topAnchor.constraint(equalTo: view.topAnchor),
            sheet.view.bottomAnchor.constraint(equalTo: view.bottomAnchor)
        ])
    }

}

extension ViewController: SheetContainerViewControllerDelegate {
    func sheetContainer(_ sheetContainer: SheetContainerViewController, willSnapToDetent detent: Detent) -> Bool {
        if detent == .bottom {
            UIView.animate(withDuration: 0.35, animations: {
                sheetContainer.view.transform = CGAffineTransform(translationX: 0, y: sheetContainer.view.bounds.height)
            }, completion: { (finished) in
                sheetContainer.removeFromParent()
                sheetContainer.didMove(toParent: nil)
                sheetContainer.view.removeFromSuperview()
            })
            return false
        }
        return true
    }
}