@IBDesignable无法在iOS swift 3中运行

Question

我做了什么: 已删除的派生数据,重新启动的xcode,编辑器 - >Refresh all views

我得到Designables在故事板构建失败当我点击编辑- > Refresh all views.

请检查以下代码.我错过了什么？当我从属性检查器更改@IBInspectable值时,Textfiled未在故事板中更新.

import UIKit
import QuartzCore

@IBDesignable
class BorderedFloatingTF: UITextField {


    required init?(coder aDecoder:NSCoder) {
        super.init(coder:aDecoder)
        setup()
    }

    override init(frame:CGRect) {
        super.init(frame:frame)
        setup()
    }

    override func textRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.insetBy(dx: 20, dy: 0)
    }

    override func editingRect(forBounds bounds: CGRect) -> CGRect {
        return textRect(forBounds: bounds)
    }
    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        setup()
    }

    // properties..

    @IBInspectable var enableTitle : Bool = false
    @IBInspectable var borderColor: UIColor = UIColor.white {
        didSet {
            layer.borderColor = borderColor.cgColor
        }
    }
    @IBInspectable var borderWidth: Int = 1 {
        didSet {
            layer.borderWidth = CGFloat(borderWidth)
        }
    }
    @IBInspectable var placeHolderColor: UIColor = UIColor.white {

        didSet {
            self.attributedPlaceholder = NSAttributedString(string:self.placeholder != nil ? self.placeholder! : "", attributes:[NSForegroundColorAttributeName: placeHolderColor])
        }
    }

    fileprivate func setup() {
        borderStyle = UITextBorderStyle.none
        layer.borderWidth = CGFloat(borderWidth)
        layer.borderColor = borderColor.cgColor
        placeHolderColor = UIColor.white
    }
}

Answer 1

试试这个

import QuartzCore

@IBDesignable
class BorderedFloatingTF: UITextField {


    required init?(coder aDecoder:NSCoder) {
        super.init(coder:aDecoder)
        setup()
    }

    override init(frame:CGRect) {
        super.init(frame:frame)
        setup()
    }

    override func textRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.insetBy(dx: 20, dy: 0)
    }

    override func editingRect(forBounds bounds: CGRect) -> CGRect {
        return textRect(forBounds: bounds)
    }


    // properties..

    @IBInspectable var enableTitle : Bool = false
    @IBInspectable var borderColor: UIColor = UIColor.white {
        didSet {
            layer.borderColor = borderColor.cgColor
        }
    }
    @IBInspectable var borderWidth: Int = 1 {
        didSet {
            layer.borderWidth = CGFloat(borderWidth)
        }
    }
    @IBInspectable var placeHolderColor: UIColor = UIColor.white {

        didSet {
            self.attributedPlaceholder = NSAttributedString(string:self.placeholder != nil ? self.placeholder! : "", attributes:[NSForegroundColorAttributeName: placeHolderColor])
        }
    }

    func setup() {
        borderStyle = UITextBorderStyle.none
        layer.borderWidth = CGFloat(borderWidth)
        layer.borderColor = borderColor.cgColor
        placeHolderColor = UIColor.white
    }
}

你IBDesignables和IBInspectables两个都很好.

Answer 2

我从xib加载自定义类时出现此问题.最后偶然发现了这个解决方案(必须为类使用正确的bundle,而不是Bundle.main):

@IBDesignable
class DataEntryView: UIView {

@IBOutlet var contentView: DataEntryView!

@IBInspectable var hasError : Bool = false

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
    self.commonInit()
}

override init(frame: CGRect) {
    super.init(frame: frame)
    self.commonInit()
}

private func commonInit() {
    let bundle = Bundle.init(for: type(of: self))
    bundle.loadNibNamed("DataEntryView", owner: self, options: nil)
    addSubview(contentView)
    contentView.translatesAutoresizingMaskIntoConstraints = false
    contentView.topAnchor.constraint(equalTo: self.topAnchor, constant: 0).isActive = true
    contentView.leftAnchor.constraint(equalTo: self.leftAnchor, constant: 0).isActive = true
    contentView.rightAnchor.constraint(equalTo: self.rightAnchor, constant: 0).isActive = true
    contentView.bottomAnchor.constraint(equalTo: self.bottomAnchor, constant: 0).isActive = true
}
}

Answer 3

我在一个项目中遇到了同样的问题。我做了以下步骤来解决这个问题。

在自定义 IBDesignable 视图中，确保覆盖这两种方法

required init?(coder aDecoder: NSCoder)
override init(frame: CGRect)

将以下内容添加到 Build Settings 中的 Runpath Search Paths

@loader_path/Frameworks
$(CONFIGURATION_BUILD_DIR)

清理您的项目，删除派生数据。

那应该没问题。