在swift中使用UILabel的子类设置自定义边框
问题描述:
我已经为自定义底部边界创建了UILabel的子类。子类是: 进口的UIKit在swift中使用UILabel的子类设置自定义边框
类BottomBorderClass:{的UILabel
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
self.setBottomBorder()
}
override init(frame: CGRect) {
super.init(frame:frame)
self.setBottomBorder()
}
func setBottomBorder()
{
self.text = "TITLE LABEL"
self.textColor = UIColor.grayColor()
let layer:CALayer = self.layer
let bottomBorder:CALayer = CALayer.init(layer: layer)
bottomBorder.borderColor = UIColor.whiteColor().CGColor
bottomBorder.borderWidth = 2;
bottomBorder.frame = CGRectMake(-1, self.layer.frame.size.height-1,
self.layer.frame.size.width, 2);
bottomBorder.borderColor = UIColor.whiteColor().CGColor
self.layer.addSublayer(bottomBorder)
}
}
在视图控制器我呼吁@IBOutlet弱VAR someLabel类:BottomBorderClass
问题是边框,文字没有显示。请帮忙!!提前致谢。
答
像这样改变你的功能。
func setBottomBorder(){
let borderWidth:CGFloat = 4.0 //Change this according to your needs
let lineView = UIView.init(frame: CGRect.init(x: 0, y:self.frame.size.height - borderWidth , width: self.frame.size.width, height: borderWidth))
lineView.backgroundColor = UIColor.green
self.addSubview(lineView)
}
从你的属性检查器,不要忘记改变这样的类。
输出:
+0
谢谢你。我只是错过了一步,我已经在评论部分更新了它。 – BlackPearl12
+0
希望你upvote并接受我的答案。 –
答
您可以CALayer的
import Foundation
import UIKit
extension CALayer {
func addBorder(edge: UIRectEdge, color: UIColor, thickness: CGFloat) {
let border = CALayer()
switch edge {
case UIRectEdge.top:
border.frame = CGRect.zero
border.frame = CGRect(x: 0, y: 0, width: self.bounds.width, height: thickness)
break
case UIRectEdge.bottom:
border.frame = CGRect(x: 0, y: self.bounds.height - thickness, width: self.bounds.width, height: thickness)
break
case UIRectEdge.left:
border.frame = CGRect(x: 0, y: 0, width: thickness, height: self.bounds.height)
break
case UIRectEdge.right:
border.frame = CGRect(x: self.bounds.width - thickness, y: 0, width: thickness, height: self.bounds.height)
break
default:
break
}
border.backgroundColor = color.cgColor;
self.addSublayer(border)
}
}
,并在控制器中创建一个扩展,用于为例:
@IBOutlet weak var someLabel: UILabel !
someLabel.layer.addBorder(edge: UIRectEdge.bottom, color: UIColor.red, thickness: 2)
用这种方法你可以使用addBorder功能与任何的UILabel,UIButton的,...
你用IBDesignable的BottomBorderClass? –
如果您正在使用故事板:您是否在Identity Insprector中设置了“自定义类”? – niggeulimann
检查我的答案。如果有帮助,请不要忘记点击向上箭头并检查标志。 :) –