如何以编程方式将 UIStackview 放入 Swift 中的 UIView 中

Question

我想将 5 个图像的 Stackview 放入 UIView 中。 基本上我想要的是制作一个带有阴影的圆形按钮，并在按钮内水平放置 5 个不同的小图像。

我已经拥有的是一个视图控制器，每个控制器都有一个声明和设置 function。 我能够制作 UIView。

这是我要实现的目标的图像：

我该如何解决这个问题？

我已经有一些代码：

private let btnUIView: UIView = {
        let btnUIView = UIView(frame: CGRect(x: 50, y: 50, width: 343, height: 77))
        btnUIView.layer.shadowColor = UIColor.black.cgColor
        btnUIView.layer.shadowOpacity = 0.5
        btnUIView.layer.shadowOffset = .zero
        btnUIView.layer.shadowRadius = 3
        btnUIView.backgroundColor = .white
        btnUIView.translatesAutoresizingMaskIntoConstraints = false
        btnUIView.layer.borderWidth = 0
        btnUIView.layer.borderColor = UIColor.gray.cgColor
        return btnUIView
    }()

 private let btnStackView: UIStackView = {
        let image = UIStackView()
        image.translatesAutoresizingMaskIntoConstraints = false
        image.distribution = .fillEqually
//        image.spacing = 60
        return image
    }()




func setupBtnView(){
        view.addSubview(btnUIView)
        btnUIView.addSubview(btnStackView)
        NSLayoutConstraint.activate([
            btnUIView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            btnUIView.topAnchor.constraint(equalTo: btnText.bottomAnchor, constant: 15),
            btnUIView.heightAnchor.constraint(equalToConstant: btnUIView.frame.height),
            btnUIView.widthAnchor.constraint(equalToConstant: btnUIView.frame.width),
        ])


let imgone = UIImageView(image: #imageLiteral(resourceName: "imgtest1"))
        let imgtwo = UIImageView(image: #imageLiteral(resourceName: "imgtest1"))
        let imgthree = UIImageView(image: #imageLiteral(resourceName: "imgtest1"))
        let imgfour = UIImageView(image: #imageLiteral(resourceName: "imgtst1"))
        let imgfive = UIImageView(image: #imageLiteral(resourceName: "imgtest1"))




btnStackView.addArrangedSubview(imgone)
btnStackView.addArrangedSubview(imgtwo)
btnStackView.addArrangedSubview(imgthree)
btnStackView.addArrangedSubview(imgfour)
btnStackView.addArrangedSubview(imgfive)

imgone.contentMode = .scaleAspectFill
imgtwo.contentMode = .scaleAspectFill
imgthree.contentMode = .scaleAspectFill
imgfour.contentMode = .scaleAspectFill
imgfive.contentMode = .scaleAspectFill


imgone.clipsToBounds = true
imgtwo.clipsToBounds = true
imgthree.clipsToBounds = true
imgfour.clipsToBounds = true
imgfive.clipsToBounds = true
    }


func setupImages(){
        view.addSubview(btnStackView)
        NSLayoutConstraint.activate([
            btnStackView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            btnStackView.topAnchor.constraint(equalTo: btnUIView.bottomAnchor, constant: 20),
            btnStackView.widthAnchor.constraint(equalToConstant: btnStackView.frame.width)
        ])

我在应用程序中看到的是一个空的 UIView：

Answer 1

这似乎很简单。 我花了大约两分钟的时间来编写代码：

这只是您所追求的粗略渲染，但它表明基本想法很简单。 我所做的只是：

1. 创建外部视图，配置圆角边框，并将其添加为子视图。

2. 创建堆栈视图，将其配置为等间距等，并将其作为子视图添加到外部视图。

3. 创建五个带有图像的图像视图（这里只是圆圈）并将它们作为排列好的子视图添加到堆栈视图中。

从字面上看，我的viewDidLoad中只有 11 行代码。

---

至于您的代码（您现在已经显示），主要问题可能是约束没有意义。 这是我对您的代码的更正（替换我自己的圆形图像，用于测试目的）； 这是我的测试应用程序视图 controller 的完整代码：

private let btnUIView: UIView = {
    let btnUIView = UIView()
    btnUIView.layer.shadowColor = UIColor.black.cgColor
    btnUIView.layer.shadowOpacity = 0.5
    btnUIView.layer.shadowOffset = .zero
    btnUIView.layer.shadowRadius = 3
    btnUIView.backgroundColor = .white
    btnUIView.translatesAutoresizingMaskIntoConstraints = false
    btnUIView.layer.borderWidth = 0
    btnUIView.layer.borderColor = UIColor.gray.cgColor
    return btnUIView
}()
private let btnStackView: UIStackView = {
    let image = UIStackView()
    image.translatesAutoresizingMaskIntoConstraints = false
    image.distribution = .fillEqually
    image.alignment = .center
    return image
}()

override func viewDidLoad() {
    super.viewDidLoad()
    let r = UIGraphicsImageRenderer(size: CGSize(width: 30, height: 30))
    let im = r.image { _ in UIBezierPath.init(ovalIn: CGRect(x: 1, y: 1, width: 28, height: 28)).stroke() }

    let imgone = UIImageView(image: im)
    let imgtwo = UIImageView(image: im)
    let imgthree = UIImageView(image: im)
    let imgfour = UIImageView(image: im)
    let imgfive = UIImageView(image: im)
    
    btnStackView.addArrangedSubview(imgone)
    btnStackView.addArrangedSubview(imgtwo)
    btnStackView.addArrangedSubview(imgthree)
    btnStackView.addArrangedSubview(imgfour)
    btnStackView.addArrangedSubview(imgfive)
    
    setupBtnView()
}

func setupBtnView(){
    view.addSubview(btnUIView)
    btnUIView.addSubview(btnStackView)
    NSLayoutConstraint.activate([
        btnUIView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
        btnUIView.topAnchor.constraint(equalTo: view.topAnchor, constant: 40),
        btnUIView.heightAnchor.constraint(equalToConstant: 100),
        btnUIView.widthAnchor.constraint(equalToConstant: 300),
    ])
    NSLayoutConstraint.activate([
        btnStackView.leadingAnchor.constraint(equalTo: btnUIView.leadingAnchor),
        btnStackView.trailingAnchor.constraint(equalTo: btnUIView.trailingAnchor),
        btnStackView.topAnchor.constraint(equalTo: btnUIView.topAnchor),
        btnStackView.bottomAnchor.constraint(equalTo: btnUIView.bottomAnchor),
    ])
}

结果：