自定义 UIButton setSelected 怪异行为

Question

我是 swift 的新手，我只是想创建一个 uibutton 的子class。除了当按钮被选中时我有这个奇怪的蓝色圆角矩形出现，如下所示。当我想要的只是一个漂亮的白色边框。

我的代码 class :

import UIKit
import QuartzCore

@IBDesignable
class ColorButton: UIButton {
    //MARK: PROPERTIES
    @IBInspectable var stickerColor: UIColor = UIColor.whiteColor() {
        didSet {
            configure()
        }
    }

    override var selected: Bool {
        willSet(newValue) {
            super.selected = newValue;
            if selected {
                layer.borderWidth = 1.0
            } else {
                layer.borderWidth = 0.0
            }
        }
    }

    //MARK: Initializers
    override init(frame : CGRect) {
        super.init(frame : frame)
        setup()
        configure()
    }

    convenience init() {
        self.init(frame:CGRectZero)
        setup()
        configure()
    }

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


    override func awakeFromNib() {
        super.awakeFromNib()
        setup()
        configure()
    }

    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        setup()
        configure()
    }

    func setup() {
        //Border color
        layer.borderColor = UIColor.whiteColor().CGColor
        //Corner Radius
        setUpCornerRadius()
    }

    func configure() {
        backgroundColor = stickerColor
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        setUpCornerRadius()
    }

    func setUpCornerRadius() {
        layer.cornerRadius = CGRectGetWidth(bounds) * 0.205
    }
}

Answer 1

我已经检查了你的代码。我遇到了同样的问题。

但是如果你将按钮类型设置为自定义则不会出现这个问题

输出：

找到 buttonType 的内容：

您可以在 CocoaBuilder 的线程中找到讨论 How to subclass UIButton? helpful, particularly Jack Nutting's suggestion to ignore the buttonType:

Note that this way the buttonType isn't explicitly set to anything, which probably means that it's UIButtonTypeCustom. The Docs don't seem to actually specify that, but since that's the 0 value in the enum, that's likely what happens (and that seems to be the observable behavior as well)

来源：

自定义 UIButton setSelected 怪异行为

Custom UIButton setSelected weird behavior

uibutton

ios

swift