Hello.
I have successfully created a scrollview with several buttons that stack on top of one another. But the View won't scroll. What am i doing wrong here?
scrollView = UIScrollView.init(frame: CGRect.zero)
				scrollView.translatesAutoresizingMaskIntoConstraints = false
				
				
				self.view.addSubview(scrollView)
				var leadingAnchor = self.scrollView!.topAnchor
				for i in 0..<20{
						let t_button = UIButton.init(frame: CGRect.zero)
						t_button.translatesAutoresizingMaskIntoConstraints = false
						t_button.backgroundColor = UIColor.blue
						scrollView.addSubview(t_button)
						NSLayoutConstraint.activate([
								t_button.topAnchor.constraint(equalTo: leadingAnchor, constant:5.0),
								t_button.centerXAnchor.constraint(equalTo: scrollView.centerXAnchor),
								t_button.heightAnchor.constraint(equalToConstant: 50.0),
								t_button.widthAnchor.constraint(equalToConstant: 75.0)
						])
						
						leadingAnchor = t_button.bottomAnchor
						
						t_button.setTitle("Button \(i)", for: .normal)
						t_button.addTarget(self, action: #selector(scrollViewButtonAction(_:)), for: .touchUpInside)
						
				}
				
				NSLayoutConstraint.activate([
						scrollView.topAnchor.constraint(equalTo: self.titleHeader.bottomAnchor, constant: 10.0),
						scrollView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor),
						scrollView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor),
						scrollView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor),
				])
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