Question

**这是我以编程方式创建的代码，但我无法使其滚动**

这是我的代码我已经尝试了很多方法以编程方式添加滚动视图但是没有用到plz帮助

 var cityname_EN: String?
 var cityname_DE: String?
 var country: String?
 var text_EN: String?
 var text_DE: String?

var scrollView: UIScrollView!
var imageView: UIImageView!

let labelOne: UILabel = {
let label = UILabel()
label.text = "Scroll Top"
label.backgroundColor = .red
label.translatesAutoresizingMaskIntoConstraints = false
return label
}()

let labelTwo: UILabel = {
    let label = UILabel()
    label.text = "Scroll Bottom"
    label.backgroundColor = .green
    label.translatesAutoresizingMaskIntoConstraints = false
    return label
}()



let allImageView: UIImageView = {
    let imageView = UIImageView(image: #imageLiteral(resourceName: "all"))
    imageView.translatesAutoresizingMaskIntoConstraints = false
    imageView.contentMode = .scaleAspectFit
    return imageView
}()


let citynameELable:UILabel = {

    let citynameELable = UILabel()


    citynameELable.textColor = UIColor.darkText
    citynameELable.textAlignment = .center
    citynameELable.font = UIFont.boldSystemFont(ofSize: 18)
    citynameELable.translatesAutoresizingMaskIntoConstraints = false

    return citynameELable

}()

let countryLable:UILabel = {

    let countryLable = UILabel()


    countryLable.textColor = UIColor.darkText
    countryLable.textAlignment = .center
    countryLable.font = UIFont.boldSystemFont(ofSize: 18)
    countryLable.translatesAutoresizingMaskIntoConstraints = false

    return countryLable

}()


let textELable: UITextView = {

    let textELable = UITextView()
    textELable.translatesAutoresizingMaskIntoConstraints = false
    textELable.textAlignment = .center
    textELable.font = UIFont.boldSystemFont(ofSize: 12)
    textELable.isEditable = false
    textELable.isScrollEnabled = false
    return textELable
}()


override func viewDidLoad() {
    super.viewDidLoad()

    view.backgroundColor = UIColor.white
    setupNavigation()
 setupLayout()


}




func setupNavigation(){

    navigationItem.title = "Map View"
    navigationController?.navigationBar.prefersLargeTitles = true
    navigationItem.hidesSearchBarWhenScrolling = false

    navigationController?.navigationBar.largeTitleTextAttributes =
        [NSAttributedStringKey.foregroundColor: UIColor.gray,
         NSAttributedStringKey.font: UIFont(name: "Arial", size: 30) ??
            UIFont.systemFont(ofSize: 30)]

}



private func setupLayout()
{

    view.addSubview(countryLable)
    view.addSubview(citynameELable)
    view.addSubview(textELable)

    citynameELable.text = cityname_EN
    countryLable.text = country

    textELable.text = text_EN

    let topMapBokContainerView = UIView()
    topMapBokContainerView.backgroundColor = UIColor.red

    topMapBokContainerView.translatesAutoresizingMaskIntoConstraints = false

    let mySegmentedControl = UISegmentedControl (items: ["English","DE"])




    mySegmentedControl.translatesAutoresizingMaskIntoConstraints = false

    mySegmentedControl.accessibilityActivate()

    mySegmentedControl.isEnabledForSegment(at: 0)

    mySegmentedControl.selectedSegmentIndex = 0

    // Add function to handle Value Changed events
    mySegmentedControl.addTarget(self, action: #selector(self.segmentedValueChanged(_:)), for: .valueChanged)




    let bottomControlsStackView = UIStackView(arrangedSubviews: [citynameELable,countryLable])
    bottomControlsStackView.backgroundColor = UIColor.blue
    bottomControlsStackView.translatesAutoresizingMaskIntoConstraints = false
    bottomControlsStackView.distribution = .fillEqually





    view.addSubview(topMapBokContainerView)




    topMapBokContainerView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
    topMapBokContainerView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
    topMapBokContainerView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
    topMapBokContainerView.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 0.5).isActive = true



    topMapBokContainerView.addSubview(allImageView)


    allImageView.centerXAnchor.constraint(equalTo: topMapBokContainerView.centerXAnchor).isActive = true
    allImageView.centerYAnchor.constraint(equalTo: topMapBokContainerView.centerYAnchor).isActive = true
    allImageView.heightAnchor.constraint(equalTo: topMapBokContainerView.heightAnchor, multiplier: 0.5).isActive = true



    self.view.addSubview(mySegmentedControl)
    NSLayoutConstraint.activate([
        mySegmentedControl.topAnchor.constraint(equalTo: topMapBokContainerView.safeAreaLayoutGuide.bottomAnchor, constant: 10 ),

        mySegmentedControl.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 10),
        mySegmentedControl.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -10),
        mySegmentedControl.heightAnchor.constraint(equalToConstant: 30)

        ])

    view.addSubview(bottomControlsStackView)

    NSLayoutConstraint.activate([
        bottomControlsStackView.topAnchor.constraint(equalTo: mySegmentedControl.safeAreaLayoutGuide.bottomAnchor, constant: 10 ),

        bottomControlsStackView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 10),
        bottomControlsStackView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -10),
        bottomControlsStackView.heightAnchor.constraint(equalToConstant: 50)

        ])

    view.addSubview(textELable)

    textELable.topAnchor.constraint(equalTo: bottomControlsStackView.safeAreaLayoutGuide.bottomAnchor).isActive = true
    textELable.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor, constant: 10).isActive = true
    textELable.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor, constant: -10).isActive = true
    textELable.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: 0).isActive = true


}

@objc func segmentedValueChanged(_ sender:UISegmentedControl!)
{

    if sender.selectedSegmentIndex == 0 {

        citynameELable.text = cityname_EN
        textELable.text = text_EN
    }
    else if  sender.selectedSegmentIndex == 1 {

        citynameELable.text = cityname_DE
        textELable.text = text_DE

    }


}





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

}

我创建的所有视图都尝试添加到view.addSubView(MyViews Here)

之类的滚动视图

Here is the screen shot of my app

Answer 1

将约束顶部，底部，前导和尾随设置为引用SuperView的ScrollView
超级视图添加滚动视图（view.addSubview（scrollView））
创建内容查看并设置约束Top，Bottom，Leading和Trailing to content view Referencing Scroll View
将内容视图添加到ScrollView（scrollView.addSubview（contentView））
在内容视图中设置元素

Answer 2

根据您的问题，您的观点层次结构应为：

查看 - ＆gt; scrollView - ＆gt; allYourViews

因此，您可以将scrollView框架设置为与视图相同，然后：

view.addSubView(scrollView) scrollView.addSubView(yourViews Here)

无法以编程方式将所有视图添加到UIScrollview中

2 个答案: