Textview 不在滚动视图中垂直滚动 - Swift 4

Question

我有一个名为 TeamDetailsViewController 的视图控制器。我以编程方式将滚动视图添加到视图控制器，并将图像视图、nameLabel 和 UITextview 添加为滚动视图的子视图。 imageview 和 NameLabel 出现了，但 Text View 由于未知原因没有出现。请帮忙。这是我的代码。

我正在使用 UIcolectionview 显示一组项目，例如表格视图。当用户点击单个单元格时，他/她会重定向到新的视图控制器，其中会显示有关用户的信息，例如图像、名称、简历。简历是TextView

class TeamDetailsController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        setupViews()
        print(textView.text)
    }

    lazy var scrollView: UIScrollView = {
        let sv = UIScrollView(frame: self.view.bounds)
        sv.backgroundColor = .white
        sv.translatesAutoresizingMaskIntoConstraints = false
        sv.layer.borderWidth = 5
        return sv
    }()

    let profileImageView: UIImageView = {
        let imageView = UIImageView()
        imageView.image = UIImage(named: "team-tony")
        imageView.contentMode = .scaleAspectFill
        imageView.layer.cornerRadius = 50
        imageView.layer.masksToBounds = true
        imageView.clipsToBounds = true
        imageView.translatesAutoresizingMaskIntoConstraints = false
        return imageView
    }()

    let nameLabel: UILabel = {
        let label = UILabel()
        label.text = "Jared 'Donald' Dunn"
        label.font = UIFont.systemFont(ofSize: 20, weight: .bold)
        label.translatesAutoresizingMaskIntoConstraints = false
        return label
    }()

    let textView: UITextView = {
        var tv = UITextView()
        tv.translatesAutoresizingMaskIntoConstraints = false
        tv.textColor = .black
        tv.font = UIFont.systemFont(ofSize: 16)
        tv.isEditable = false
        return tv
    }()

    func setupViews() {

        view.backgroundColor = .white
        view.addSubview(scrollView)

        scrollView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 0).isActive = true
        scrollView.leftAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leftAnchor, constant: 0).isActive = true
        scrollView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: 0).isActive = true
        scrollView.rightAnchor.constraint(equalTo: view.safeAreaLayoutGuide.rightAnchor, constant: 0).isActive = true

        scrollView.addSubview(profileImageView)
        profileImageView.centerXAnchor.constraint(equalTo: scrollView.centerXAnchor).isActive = true
        profileImageView.topAnchor.constraint(equalTo: scrollView.topAnchor, constant: 20).isActive = true

        scrollView.addSubview(nameLabel)
        nameLabel.centerXAnchor.constraint(equalTo: scrollView.centerXAnchor).isActive = true
        nameLabel.topAnchor.constraint(equalTo: profileImageView.bottomAnchor, constant: 10).isActive = true

        scrollView.addSubview(textView)
        textView.topAnchor.constraint(equalTo: nameLabel.bottomAnchor).isActive = true
        textView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor).isActive = true
        textView.leftAnchor.constraint(equalTo: scrollView.leftAnchor, constant: 20).isActive = true
        textView.rightAnchor.constraint(equalTo: scrollView.rightAnchor, constant: 20).isActive = true


    }

}

Answer 1

你需要设置textView的bottomAnchor。您还需要明确提供其高度和宽度或设置 leadingAnchor 和 trailingAnchor。

附：如果这不能解决您的问题。请尝试在您的问题中添加更多详细信息（您要开发的示例 UI）。