我已经开源了一个UIButton子类stabuton来填补这个功能缺口。在MIT许可下可用。适用于iOS 7+(我没有测试过旧的iOS版本)。

把它放进去，你就可以开始了: *属性可以在IB中设置，如果没有设置高亮背景，按下时背景不会改变

private var highlightedBackgroundColors = [UIButton:UIColor]()
private var unhighlightedBackgroundColors = [UIButton:UIColor]()
extension UIButton {

    @IBInspectable var highlightedBackgroundColor: UIColor? {
        get {
            return highlightedBackgroundColors[self]
        }

        set {
            highlightedBackgroundColors[self] = newValue
        }
    }

    override open var backgroundColor: UIColor? {
        get {
            return super.backgroundColor
        }

        set {
            unhighlightedBackgroundColors[self] = newValue
            super.backgroundColor = newValue
        }
    }

    override open var isHighlighted: Bool {
        get {
            return super.isHighlighted
        }

        set {
            if highlightedBackgroundColor != nil {
                super.backgroundColor = newValue ? highlightedBackgroundColor : unhighlightedBackgroundColors[self]
            }
            super.isHighlighted = newValue
        }
    }
}

斯威夫特3:

extension UIButton {
    private func imageWithColor(color: UIColor) -> UIImage {
        let rect = CGRect(x:0.0,y:0.0,width: 1.0,height: 1.0)
        UIGraphicsBeginImageContext(rect.size)
        let context = UIGraphicsGetCurrentContext()

        context!.setFillColor(color.cgColor)
        context!.fill(rect)

        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return image!
    }

    func setBackgroundColor(color: UIColor, forUIControlState state: UIControlState) {
        self.setBackgroundImage(imageWithColor(color: color), for: state)
    }
}

下面的uiimage扩展将生成具有指定颜色参数的图像对象。

extension UIImage {
    static func imageWithColor(tintColor: UIColor) -> UIImage {
        let rect = CGRect(x: 0, y: 0, width: 1, height: 1)
        UIGraphicsBeginImageContextWithOptions(rect.size, false, 0)
        tintColor.setFill()
        UIRectFill(rect)
        let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext()
        return image
       }
    }

按钮的示例用法可以应用于按钮对象，如下所示:

setupButton.setBackgroundImage(UIImage.imageWithColor(tintColor: UIColor(displayP3Red: 232/255, green: 130/255, blue: 121/255, alpha: 1.0)), for: UIControlState.highlighted)

setupButton.setBackgroundImage(UIImage.imageWithColor(tintColor: UIColor(displayP3Red: 255/255, green: 194/255, blue: 190/255, alpha: 1.0)), for: UIControlState.normal)

Swift中一个方便的通用扩展:

extension UIButton {
    private func imageWithColor(color: UIColor) -> UIImage {
        let rect = CGRectMake(0.0, 0.0, 1.0, 1.0)
        UIGraphicsBeginImageContext(rect.size)
        let context = UIGraphicsGetCurrentContext()

        CGContextSetFillColorWithColor(context, color.CGColor)
        CGContextFillRect(context, rect)

        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return image
    }

    func setBackgroundColor(color: UIColor, forUIControlState state: UIControlState) {
        self.setBackgroundImage(imageWithColor(color), forState: state)
    }
}

斯威夫特3.0

extension UIButton {
    private func imageWithColor(color: UIColor) -> UIImage? {
        let rect = CGRect(x: 0.0, y: 0.0, width: 1.0, height: 1.0)
        UIGraphicsBeginImageContext(rect.size)
        let context = UIGraphicsGetCurrentContext()

        context?.setFillColor(color.cgColor)
        context?.fill(rect)

        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return image
    }

    func setBackgroundColor(_ color: UIColor, for state: UIControlState) {
        self.setBackgroundImage(imageWithColor(color: color), for: state)
    }
}

子类化UIButton并添加可检查的属性以方便使用(在Swift 3.0中编写):

final class SelectableBackgroundButton: UIButton {

    private struct Constants {
        static let animationDuration: NSTimeInterval = 0.1
    }

    @IBInspectable
    var animatedColorChange: Bool = true

    @IBInspectable
    var selectedBgColor: UIColor = UIColor.blackColor().colorWithAlphaComponent(0.2)

    @IBInspectable
    var normalBgColor: UIColor = UIColor.clearColor()

    override var selected: Bool {
        didSet {
            if animatedColorChange {
                UIView.animateWithDuration(Constants.animationDuration) {
                    self.backgroundColor = self.selected ? self.selectedBgColor : self.normalBgColor
                }
            } else {
                self.backgroundColor = selected ? selectedBgColor : normalBgColor
            }
        }
    }

    override var highlighted: Bool {
        didSet {
            if animatedColorChange {
                UIView.animateWithDuration(Constants.animationDuration) {
                    self.backgroundColor = self.highlighted ? self.selectedBgColor : self.normalBgColor
                }
            } else {
                self.backgroundColor = highlighted ? selectedBgColor : normalBgColor
            }
        }
    }
}