xcode Interface Builder 未更新 IBDesignable class

Question

在我的项目中，我有几个基于 UITextField 和 UIButton 的自定义 class 文件。

例如，UITextField class 如下所示：

import UIKit

@IBDesignable class RoundedTextField: UITextField {

    override func awakeFromNib() {
        super.awakeFromNib()

        layer.cornerRadius = 25
        layer.borderWidth = 2
        layer.borderColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
        clipsToBounds = true
        textColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)

        // Placeholder colour
        attributedPlaceholder = NSAttributedString(string: placeholder!, attributes: [NSAttributedStringKey.foregroundColor: #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)])
    }

    // Placeholder text indent
    override func textRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.insetBy(dx: 20, dy: 5)
    }

    // Editing text indent
    override func editingRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.insetBy(dx: 20, dy: 5)
    }
}

这是模拟器显示给我的正确版本： SimScreenshot

以下是 IB 向我展示的内容： IBScreenshot

正如您从我的 IB 屏幕截图中看到的那样，唯一更新的元素是占位符文本的缩进。 class 中的其余自定义未更新。

有什么想法吗？

P.s。当我 select 一个元素时，在身份检查器中， 'Designables' 字段是 "Up to date".

我已尝试清理、构建和重新启动 Xcode。

谢谢！斯科特

Answer 1

我在 Reinier 的第二个 link 和我之前在 Udemy 上的课程的帮助下解决了这个问题。

我在 setupView() 函数中实现了自定义。我在 prepareForInterfaceBuilder() 和 awakeFromNib()

中调用了这个

import UIKit

@IBDesignable class RoundedTextField: UITextField {

    override func awakeFromNib() {
        super.awakeFromNib()
        setupView()
    }

    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        self.setupView()
    }

    // Placeholder text indent
    override func textRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.insetBy(dx: 20, dy: 5)
    }

    // Editing text indent
    override func editingRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.insetBy(dx: 20, dy: 5)
    }

    func setupView() {
        layer.cornerRadius = 25
        layer.borderWidth = 2
        layer.borderColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
        clipsToBounds = true
        textColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)

        // Placeholder colour
        attributedPlaceholder = NSAttributedString(string: placeholder!, attributes: [NSAttributedStringKey.foregroundColor: #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)])
    }
}

Answer 2

//它会更新Simulator和InterfaceBuilder

import UIKit
@IBDesignable class ViewExtended: UIView {
    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        setupView()
    }
    func setupView() {
        layer.borderColor = borderColor.cgColor
        layer.borderWidth = borderWidth
        layer.cornerRadius = cornerRadius
        layer.shadowOpacity = shadowOpacity
        layer.shadowRadius = shadowRadius
    }
    override func awakeFromNib() {
        super.awakeFromNib()
        setupView()
    }
    @IBInspectable var borderColor: UIColor = UIColor.red {
        didSet {
            layer.borderColor = borderColor.cgColor
            setNeedsLayout()
        }
    }
    @IBInspectable var borderWidth: CGFloat = 1.0 {
        didSet {
            layer.borderWidth = borderWidth
            setNeedsLayout()
        }
    }
    @IBInspectable var cornerRadius: CGFloat = 10.0 {
        didSet {
            layer.cornerRadius = cornerRadius
            setNeedsLayout()
        }
    }
    @IBInspectable var shadowColor: UIColor = UIColor.black {
        didSet {
            layer.borderColor = borderColor.cgColor
            setNeedsLayout()
        }
    }
    @IBInspectable var shadowOpacity: Float = 0.7 {
        didSet {
            layer.shadowOpacity = shadowOpacity
            setNeedsLayout()
        }
    }
    @IBInspectable var shadowRadius: CGFloat = 4.0 {
        didSet {
            layer.shadowRadius = shadowRadius
            setNeedsLayout()
        }
    }
    @IBInspectable var shadowOffset: CGSize = CGSize(width: 3, height: 3) {
        didSet {
            layer.shadowOffset = shadowOffset
            setNeedsLayout()
        }
    }
}

xcode Interface Builder 未更新 IBDesignable class

xcode Interface Builder not updating IBDesignable class

xcode

interface-builder

ios

ibdesignable