How to create a UIScrollView Programmatically?

Question

Alright, so the key here is I\'m not using IB at all, because the View I\'m working with is created programmatically. The UIView covers the lower half the scre

Answer 1

I use lazy a lot when creating UI programmatically, like this:

class WorldViewController: UIViewController {
    override func loadView() {
        super.loadView()
        view = scrollView
        scrollView.addSubview(label0)
    }

    lazy var scrollView: UIScrollView = {
        let instance = UIScrollView()
        instance.backgroundColor = UIColor.blackColor()
        return instance
    }()

    lazy var label0: UILabel = {
        let instance = UILabel()
        instance.text = "Ice caps are melting"
        instance.textColor = UIColor.whiteColor()
        instance.sizeToFit()
        return instance
    }()

    var needLayoutContent = true

    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        if needLayoutContent {
            let bounds = scrollView.bounds
            let contentSize = CGSizeMake(bounds.width * 1.5, bounds.height * 1.5)
            label0.center = CGPointMake(contentSize.width / 2, contentSize.height / 2)
            scrollView.contentSize = contentSize
            scrollView.contentOffset = CGPointMake(bounds.width * 0.25, bounds.height * 0.25)
            needLayoutContent = false
        }
    }
}