How to scroll my UIViewController content? - ios

Question

I've been trying to search for a swift version of a solution to no avail. I was wondering how I can make my view controller scroll content. Right now it's just static, and there's more content below, which I'm unable to scroll.
class ProfileViewController: UIViewController, UICollectionViewDelegateFlowLayout {
let postsId = "postsId"
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(profileContainerView)
view.addSubview(profileTabCollection)
view.addSubview(containerForCollectionView)
view.addSubview(scrollView)
scrollView.widthAnchor.constraintEqualToConstant(view.frame.size.width).active = true
scrollView.heightAnchor.constraintEqualToConstant(view.frame.size.height).active = true
scrollView.centerXAnchor.constraintEqualToAnchor(view.centerXAnchor).active = true
scrollView.centerYAnchor.constraintEqualToAnchor(view.centerYAnchor).active = true
scrollView.userInteractionEnabled = true
scrollView.scrollEnabled = true
scrollView.delegate = self
containerForCollectionView.widthAnchor.constraintEqualToConstant(scrollView.frame.size.width).active = true
containerForCollectionView.heightAnchor.constraintEqualToConstant(scrollView.frame.size.height).active = true
containerForCollectionView.topAnchor.constraintEqualToAnchor(profileTabCollection.bottomAnchor).active = true
profileContainerView.widthAnchor.constraintEqualToConstant(scrollView.frame.size.width).active = true
profileContainerView.heightAnchor.constraintEqualToConstant(250).active = true
profileContainerView.centerXAnchor.constraintEqualToAnchor(scrollView.centerXAnchor).active = true
profileContainerView.topAnchor.constraintEqualToAnchor(topLayoutGuide.bottomAnchor).active = true
profileTabCollection.widthAnchor.constraintEqualToAnchor(profileContainerView.widthAnchor).active = true
profileTabCollection.heightAnchor.constraintEqualToConstant(50).active = true
profileTabCollection.centerXAnchor.constraintEqualToAnchor(view.centerXAnchor).active = true
profileTabCollection.topAnchor.constraintEqualToAnchor(profileContainerView.bottomAnchor).active = true
}
lazy var scrollView: UIScrollView = {
let sv = UIScrollView(frame: CGRectMake(0,0,1024,768))
sv.contentSize = CGSizeMake(self.view.frame.size.width, self.view.frame.size.height * 3)
sv.translatesAutoresizingMaskIntoConstraints = false
return sv
}()
let containerForCollectionView: UIView = {
let view = UIView()
view.backgroundColor = UIColor.purpleColor()
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()

Answer 1

There are numerous reasons why this won't work. Since you don't provide enough information to be sure what it is, i'd recommend reading this (especially Duncan C's answer) carefully.
how do i alter the position of a UIImage inside a imageView in SWIFT

Answer 2

Write these lines in override layoutSubviews() method.
scrollView.widthAnchor.constraintEqualToAnchor(view.widthAnchor).active = true
scrollView.heightAnchor.constraintEqualToAnchor(view.heightAnchor).active = true
Make sure you created UIScrollView in your UIViewController, otherwise it won't work for sure.

Answer 3

If you are using swift 2.0 and you have used "UIScrollViewDelegate"- you need to add this method
func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
return imgview
}
And if you are using swift 3.0 - you need this function
func viewForZooming( in scrollView: UIScrollView) -> UIView? {
return imgview
}