我试图创建一个带有圆角和阴影的按钮。无论我如何尝试修改,按钮都无法正确显示。我已经尝试了masksToBounds = false
和 masksToBounds = true
,但是要么圆角可以正常工作而阴影不显示,要么阴影可以正常工作而圆角无法剪裁按钮的角落。
import UIKit
import QuartzCore
@IBDesignable
class Button : UIButton
{
@IBInspectable var masksToBounds: Bool = false {didSet{updateLayerProperties()}}
@IBInspectable var cornerRadius : CGFloat = 0 {didSet{updateLayerProperties()}}
@IBInspectable var borderWidth : CGFloat = 0 {didSet{updateLayerProperties()}}
@IBInspectable var borderColor : UIColor = UIColor.clearColor() {didSet{updateLayerProperties()}}
@IBInspectable var shadowColor : UIColor = UIColor.clearColor() {didSet{updateLayerProperties()}}
@IBInspectable var shadowOpacity: CGFloat = 0 {didSet{updateLayerProperties()}}
@IBInspectable var shadowRadius : CGFloat = 0 {didSet{updateLayerProperties()}}
@IBInspectable var shadowOffset : CGSize = CGSizeMake(0, 0) {didSet{updateLayerProperties()}}
override func drawRect(rect: CGRect)
{
updateLayerProperties()
}
func updateLayerProperties()
{
self.layer.masksToBounds = masksToBounds
self.layer.cornerRadius = cornerRadius
self.layer.borderWidth = borderWidth
self.layer.borderColor = borderColor.CGColor
self.layer.shadowColor = shadowColor.CGColor
self.layer.shadowOpacity = CFloat(shadowOpacity)
self.layer.shadowRadius = shadowRadius
self.layer.shadowOffset = shadowOffset
}
}
drawRect
中设置图层属性不是一个很好的主意,最好将它们放在initWithCoder
中。 - David Berry