弹性布局不使用子视图控制器

我试图按照这里描述的示例来制作一个弹性布局,其中包括 UIImageView UIScrollView . https://github.com/TwoLivesLeft/StretchyLayout/tree/Step-6

唯一不同的是我把 UILabel UIViewController 它本身包含一个 UICollectionView UICollectionViewCell .

import UIKit
import SnapKit

class HomeController: UIViewController, UIScrollViewDelegate {

private let scrollView = UIScrollView()
private let imageView = UIImageView()
private let contentContainer = UIView()
private let collectionViewController = CollectionViewController()

override var preferredStatusBarStyle: UIStatusBarStyle {
    return .lightContent
}

override func viewDidLoad() {
    super.viewDidLoad()


    scrollView.contentInsetAdjustmentBehavior = .never
    scrollView.delegate = self

    imageView.image = UIImage(named: "burger")
    imageView.contentMode = .scaleAspectFill
    imageView.clipsToBounds = true

    let imageContainer = UIView()
    imageContainer.backgroundColor = .darkGray

    contentContainer.backgroundColor = .clear

    let textBacking = UIView()
    textBacking.backgroundColor = #colorLiteral(red: 0.7450980544, green: 0.1235740449, blue: 0.2699040081, alpha: 1)

    view.addSubview(scrollView)

    scrollView.addSubview(imageContainer)
    scrollView.addSubview(textBacking)
    scrollView.addSubview(contentContainer)
    scrollView.addSubview(imageView)

    self.addChild(collectionViewController)
    contentContainer.addSubview(collectionViewController.view)
    collectionViewController.didMove(toParent: self)


    scrollView.snp.makeConstraints {
        make in

        make.edges.equalTo(view)
    }

    imageContainer.snp.makeConstraints {
        make in

        make.top.equalTo(scrollView)
        make.left.right.equalTo(view)
        make.height.equalTo(imageContainer.snp.width).multipliedBy(0.7)
    }

    imageView.snp.makeConstraints {
        make in

        make.left.right.equalTo(imageContainer)

        //** Note the priorities
        make.top.equalTo(view).priority(.high)

        //** We add a height constraint too
        make.height.greaterThanOrEqualTo(imageContainer.snp.height).priority(.required)

        //** And keep the bottom constraint
        make.bottom.equalTo(imageContainer.snp.bottom)
    }

    contentContainer.snp.makeConstraints {
        make in

        make.top.equalTo(imageContainer.snp.bottom)
        make.left.right.equalTo(view)
        make.bottom.equalTo(scrollView)
    }

    textBacking.snp.makeConstraints {
        make in

        make.left.right.equalTo(view)
        make.top.equalTo(contentContainer)
        make.bottom.equalTo(view)
    }

    collectionViewController.view.snp.makeConstraints {
        make in

        make.left.right.equalTo(view)
        make.top.equalTo(contentContainer)
        make.bottom.equalTo(view)
    }

}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()

    scrollView.scrollIndicatorInsets = view.safeAreaInsets
    scrollView.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: view.safeAreaInsets.bottom, right: 0)
}

//MARK: - Scroll View Delegate

private var previousStatusBarHidden = false

func scrollViewDidScroll(_ scrollView: UIScrollView) {
    if previousStatusBarHidden != shouldHideStatusBar {

        UIView.animate(withDuration: 0.2, animations: {
            self.setNeedsStatusBarAppearanceUpdate()
        })

        previousStatusBarHidden = shouldHideStatusBar
    }
}

//MARK: - Status Bar Appearance

override var preferredStatusBarUpdateAnimation: UIStatusBarAnimation {
    return .slide
}

override var prefersStatusBarHidden: Bool {
    return shouldHideStatusBar
}

private var shouldHideStatusBar: Bool {
    let frame = contentContainer.convert(contentContainer.bounds, to: nil)
    return frame.minY < view.safeAreaInsets.top
}

}

所有内容都与此文件中的相同: https://github.com/TwoLivesLeft/StretchyLayout/blob/Step-6/StretchyLayouts/StretchyViewController.swift 除了 innerText CollectionViewController .

ui集合视图 显示正确-但是我无法再向上或向下滚动。我不知道我的错误在哪里。