swift 如何在标签内嵌入自定义按钮？

Question

我创建了一个自定义信息按钮，我想将其放入常规 UILabel 中。这个想法是让屏幕显示 "Tap the (BUTTON HERE) for more information"。有没有办法在不创建两个 UILabel 的情况下做到这一点？如果创建 2 个标签是唯一的方法，我怎样才能将所有内容放在一行中？

我尝试在 label.text 中执行 (button) 操作，但这显示了按钮的属性而不是放置按钮。我也试过 label.addSubview(button) 可以工作但是在错误的地方添加了按钮。

Answer 1

最好的方法是使用带有 NSAttributedString 的 UITextView，其中一个属性是您的 link。

let textView = UITextView()
textView.delegate = self

// These allow the link to be tapped
textView.isEditable = false
textView.isScrollEnabled = false

// Removes padding that UITextView uses, making it look more like a UILabel
textView.textContainer.lineFragmentPadding = 0.0
textView.textContainerInset = .zero

然后对于 NSAttributedString

let text = "Tap HERE for more information"
let linkText = "HERE"

// Get range for tappable section
let linkRange = (text as NSString).range(of: linkText)

// Styling
let attributes: [NSAttributedString.Key: Any] = [
    .foregroundColor: UIColor.black
]

// Actual Link!
let linkTextAttributes: [NSAttributedString.Key: Any] = [
    .underlineStyle: NSUnderlineStyle.single.rawValue,
    .link: "https://www.example.com" //The link you want to link to
]

let attributedString = NSMutableAttributedString(string: text, attributes: attributes)
attributedString.addAttributes(linkTextAttributes, range: linkRange)

然后使用这些 UITextView 委托函数

// Removes a lot of the actions when user selects text
override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
    return false
}

// Handle the user tapping the link however you like here
func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool {
    viewModel.urlTapped(URL)
    return false
}

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