实现 UIScrollview swift 3

Question

我的项目结构是这样的： -看法 --UIScrollView - -看法 ----containerItems

我正在尝试让我的屏幕可滚动但始终是静态的，这是我的代码：

class LoginCtrl: UIViewController {
    let svPantalla: UIScrollView = {
        let sv = UIScrollView(frame: UIScreen.main.bounds)
        sv.backgroundColor = UIColor(r: 31, g: 90, b: 161)
        sv.contentSize = CGSize(width: 0, height: 0)
        sv.isScrollEnabled = true
        sv.contentOffset = CGPoint(x: 10, y: 20)
        sv.translatesAutoresizingMaskIntoConstraints = false
        return sv
    }()
    let v2: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor.green
        view.translatesAutoresizingMaskIntoConstraints = false
        return view
    }()
    //contenedor textField
    let contenedorCampos: UIView = {
        let view = UIView()
        view.backgroundColor = UIColor(r: 255, g: 255, b: 255)
        view.translatesAutoresizingMaskIntoConstraints = false
        view.layer.cornerRadius = 5
        view.layer.masksToBounds = true
        return view
    }()
    let botonLoginRegistrarme: UIButton = {
        let button = UIButton(type: .system)
        button.backgroundColor = UIColor(r: 255, g: 152, b: 0)
        button.setTitle("Iniciar Sesion", for: .normal)
        button.setTitleColor(UIColor.white, for: .normal)
        button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 16)
        button.translatesAutoresizingMaskIntoConstraints = false
        return button
    }()
    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(svPantalla)
        svPantalla.addSubview(v2)
        v2.addSubview(contenedorCampos)
        v2.addSubview(botonLoginRegistrarme)
        setear_posicion_svPantalla()
        setear_posicion_hijoV()
        setear_posicion_contenedor()
        setear_posicion_botonRegistrarme()
        //this functions are in the image added
    }
}

我的卷轴不工作，我该如何解决？

Answer 1

因为你已经设置了

sv.contentSize = CGSize(宽度: 0, 高度: 0)

请删除此行或添加值而不是 0。