作为另一个提示，确保你的按钮不是任何自定义类的子类在故事板，在这种情况下，你的代码最好的地方应该在自定义类它自己的原因代码只出自定义类，如果你的按钮是默认UIButton类的子类和它的出口，希望这可能有助于任何人想知道为什么角收音机不适用于我的按钮从代码。

它是UIButton圆角边框的全局方法

class func setRoundedBorderButton(btn:UIButton)
{
   btn.layer.cornerRadius = btn.frame.size.height/2
   btn.layer.borderWidth = 0.5
   btn.layer.borderColor = UIColor.darkGray.cgColor
}

我认为这是简单的形式

Button1.layer.cornerRadius = 10(Half of the length and width)
Button1.layer.borderWidth = 2

这个类是基于所有的评论和建议的答案，也可以直接从xcode设计。复制到你的项目并插入任何UIButton并更改为使用自定义类，现在只需从xcode中选择正常和/或高亮显示状态的边框或背景颜色。

//
//  RoundedButton.swift
//

import UIKit

@IBDesignable
class RoundedButton:UIButton {

    @IBInspectable var borderWidth: CGFloat = 0 {
        didSet {
            layer.borderWidth = borderWidth
        }
    }
    //Normal state bg and border
    @IBInspectable var normalBorderColor: UIColor? {
        didSet {
            layer.borderColor = normalBorderColor?.CGColor
        }
    }

    @IBInspectable var normalBackgroundColor: UIColor? {
        didSet {
            setBgColorForState(normalBackgroundColor, forState: .Normal)
        }
    }


    //Highlighted state bg and border
    @IBInspectable var highlightedBorderColor: UIColor?

    @IBInspectable var highlightedBackgroundColor: UIColor? {
        didSet {
            setBgColorForState(highlightedBackgroundColor, forState: .Highlighted)
        }
    }


    private func setBgColorForState(color: UIColor?, forState: UIControlState){
        if color != nil {
            setBackgroundImage(UIImage.imageWithColor(color!), forState: forState)

        } else {
            setBackgroundImage(nil, forState: forState)
        }
    }

    override func layoutSubviews() {
        super.layoutSubviews()

        layer.cornerRadius = layer.frame.height / 2
        clipsToBounds = true

        if borderWidth > 0 {
            if state == .Normal && !CGColorEqualToColor(layer.borderColor, normalBorderColor?.CGColor) {
                layer.borderColor = normalBorderColor?.CGColor
            } else if state == .Highlighted && highlightedBorderColor != nil{
                layer.borderColor = highlightedBorderColor!.CGColor
            }
        }
    }

}

//Extension Required by RoundedButton to create UIImage from UIColor
extension UIImage {
    class func imageWithColor(color: UIColor) -> UIImage {
        let rect: CGRect = CGRectMake(0, 0, 1, 1)
        UIGraphicsBeginImageContextWithOptions(CGSizeMake(1, 1), false, 1.0)
        color.setFill()
        UIRectFill(rect)
        let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }
}

我已经创建了一个简单的UIButton子模块，它使用tintColor作为文本和边框颜色，当高亮显示时，它的背景改变为tintColor。

class BorderedButton: UIButton {

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
    layer.borderWidth = 1.0
    layer.borderColor = tintColor.CGColor
    layer.cornerRadius = 5.0
    clipsToBounds = true
    contentEdgeInsets = UIEdgeInsets(top: 8, left: 8, bottom: 8, right: 8)
    setTitleColor(tintColor, forState: .Normal)
    setTitleColor(UIColor.whiteColor(), forState: .Highlighted)
    setBackgroundImage(UIImage(color: tintColor), forState: .Highlighted)
}
}

这利用了一个UIImage扩展，从一个颜色创建一个图像，我发现代码在这里:https://stackoverflow.com/a/33675160

当在界面构建器中设置为自定义类型时，它工作得最好，因为默认的系统类型会在按钮突出显示时略微修改颜色。

你可以子类化UIButton并给它添加@IBInspectable变量，这样你就可以通过StoryBoard的“Attribute Inspector”配置自定义按钮参数。下面我写下代码。

@IBDesignable
class BHButton: UIButton {

    /*
    // Only override draw() if you perform custom drawing.
    // An empty implementation adversely affects performance during animation.
    override func draw(_ rect: CGRect) {
        // Drawing code
    }
    */

    @IBInspectable lazy var isRoundRectButton : Bool = false

    @IBInspectable public var cornerRadius : CGFloat = 0.0 {
        didSet{
            setUpView()
        }
    }

    @IBInspectable public var borderColor : UIColor = UIColor.clear {
        didSet {
            self.layer.borderColor = borderColor.cgColor
        }
    }

    @IBInspectable public var borderWidth : CGFloat = 0.0 {
        didSet {
            self.layer.borderWidth = borderWidth
        }
    }

    //  MARK:   Awake From Nib

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

    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        setUpView()
    }

    func setUpView() {
        if isRoundRectButton {
            self.layer.cornerRadius = self.bounds.height/2;
            self.clipsToBounds = true
        }
        else{
            self.layer.cornerRadius = self.cornerRadius;
            self.clipsToBounds = true
        }
    }

}