UIviewとUICollectionViewを同じ画面に表示したい

Question

最近ios開発をはじめて初心者です。

画面を上と下にわけて
上をUIview
下をUICollectionView
を表示したいと考えています。

UICollectionViewがaddSubViewできなくて困っています。
ご助言いただましたら嬉しいです。

MainViewController.swift

import UIKit

class MainViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        let MyCollectionView = MyCollectionViewController()
        self.view.addSubview(collectionView)
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

MyCollectionViewController.swift

import UIKit

class MyCollectionViewController: UIViewController, UICollectionViewDataSource {
    var collectionView:UICollectionView!
   
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
       
        let flowLayout = UICollectionViewFlowLayout()
        flowLayout.scrollDirection = .Vertical
        flowLayout.minimumInteritemSpacing = 5.0
        flowLayout.minimumLineSpacing = 5.0
        flowLayout.itemSize = CGSizeMake(100, 100)
       
        collectionView = UICollectionView(frame: view.frame, collectionViewLayout: flowLayout)
        collectionView.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")
        collectionView.dataSource = self
        view.addSubview(collectionView)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
   
    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 100
    }
   
    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
       
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as UICollectionViewCell
        cell.backgroundColor = UIColor.redColor()
        return cell
    }
   
   
}

Answer 1

MyCollectionViewControllerはUIViewControllerなので、viewにaddSubviewできません。
UIViewをaddSubviewしてください。