Question

从网络请求获得响应后，我试图创建按钮。在创建视图后，在加载视图后，我该如何做并放置它们。我也在以编程方式并使用AutoLayout创建视图。

CustomView.swift

git clone

ViewController.swift

git

Answer 1

尝试将按钮添加到替代viewWillAppear（）

https://developer.apple.com/documentation/uikit/uiviewcontroller/1621510-viewwillappear

或者该较早的帖子可能会帮助您：

How to create a button programmatically?

但是我会先尝试使用viewWillAppear（）

Answer 2

/// Helper function to create a new button.
func createButton(_ title: String) -> UIButton {
    let button = UIButton()
    button.backgroundColor = .blue
    button.setTitle(title, .normal)

    // Add the button as a subview.
    self.view.addSubview(button)
}

override func viewDidLoad() {
    super.viewDidLoad()

    // Just set the viewController's view to your custom view here.
    self.view = CustomView()

    // Create buttons after getting response
    viewModel.output.apiOutput
        .subscribe(onNext: { posts in
            for post in posts {
                // Create a button. Change "title" to the title of your post, etc.
                let button = createButton("Title")
                // Constrain your button here!
            }
        })
        .dispose(by: disposeBag)
}

上面写着// Constrain your button here!的地方-如果要在一行或一列中使用多个按钮，我建议您使用UIStackView，然后将其添加为ArrangedSubviews。

在viewDidLoad之后如何创建/添加UIView？

2 个答案: