ios - Swift 如何在变量闭包中干燥代码？

Question

我正在使用自动布局(以编程方式)设置我的 ViewController，我已经得到了我想要的一切，但现在我想让我的代码更有效率，我注意到我有很多重复代码，我是试图弄清楚如何在变量闭包中获取重复代码并将其放在其他地方，以便代码更清晰。

如何清理我的代码？对变量闭包还是陌生的。

我复制粘贴的代码是一个全局变量。

let descriptionTextViewOne: UITextView = {
    let textView = UITextView()

    let text = "Tap anywhere to start\nyour day right!"
    let shadow = NSShadow()
    shadow.shadowColor = UIColor.white
    shadow.shadowOffset = CGSize(width: 1, height: 1)
    let attributes: [NSAttributedString.Key: Any] = [
        .font: UIFont.init(name: "Marker felt", size: 25)!,
        .foregroundColor: UIColor.init(red: 91.0/255.0, green: 91.0/255.0, blue: 91.0/255.0, alpha: 1.0),
        .shadow: shadow
    ]
    let attributedText = NSAttributedString(string: text, attributes: attributes)
    textView.attributedText = attributedText
    textView.textAlignment = .center
    textView.isEditable = false
    textView.isScrollEnabled = false
    textView.isSelectable = false
    textView.translatesAutoresizingMaskIntoConstraints = false
    textView.backgroundColor = .clear
    return textView
}()

let descriptionTextViewTwo: UITextView = {
    let textView = UITextView()

    let text = "A happy video a day\nmakes the heartache\ngo away."
    let shadow = NSShadow()
    shadow.shadowColor = UIColor.white
    shadow.shadowOffset = CGSize(width: 1, height: 1)
    let attributes: [NSAttributedString.Key: Any] = [
        .font: UIFont.init(name: "Marker felt", size: 25)!,
        .foregroundColor: UIColor.init(red: 91.0/255.0, green: 91.0/255.0, blue: 91.0/255.0, alpha: 1.0),
        .shadow: shadow
    ]
    let attributedText = NSAttributedString(string: text, attributes: attributes)
    textView.attributedText = attributedText
    textView.textAlignment = .center
    textView.isEditable = false
    textView.isScrollEnabled = false
    textView.isSelectable = false
    textView.translatesAutoresizingMaskIntoConstraints = false
    textView.backgroundColor = .clear
    return textView
}()

Answer 1

您可以创建一个函数并重用它

func descriptionTextView(with text: String) -> UITextView {
    let textView = UITextView()
    let shadow = NSShadow()
    shadow.shadowColor = UIColor.white
    shadow.shadowOffset = CGSize(width: 1, height: 1)
    let attributes: [NSAttributedString.Key: Any] = [
        .font: UIFont.init(name: "Marker felt", size: 25)!,
        .foregroundColor: UIColor.init(red: 91.0/255.0, green: 91.0/255.0, blue: 91.0/255.0, alpha: 1.0),
        .shadow: shadow
    ]
    let attributedText = NSAttributedString(string: text, attributes: attributes)
    textView.attributedText = attributedText
    textView.textAlignment = .center
    textView.isEditable = false
    textView.isScrollEnabled = false
    textView.isSelectable = false
    textView.translatesAutoresizingMaskIntoConstraints = false
    textView.backgroundColor = .clear
    return textView
}

lazy var descriptionTextViewOne: UITextView = descriptionTextView(with: "Tap anywhere to start\nyour day right!")

lazy var descriptionTextViewTwo: UITextView = descriptionTextView(with: "A happy video a day\nmakes the heartache\ngo away.")