创建水平线

创建 UIView 黑色背景高度 1 像素和宽度 320 像素。

使用 UIView:

UIView * separator = [[UIView alloc] initWithFrame:CGRectMake/x, y, 320, 1/];

separator.backgroundColor = [UIColor colorWithWhite:0.7 alpha:1];

[self.view addSubview:separator];

[separator release];

决定 Jasarien 很简单，它没有创造

实际的头发生长线 1 像素

, 和线宽宽度 2 设备上的像素 2X.

我发现了一条消息
http://www.iriphon.com/2014/02 ... -ios/
如何创建一个厚实的薄发线 1 像素。
我们需要一个子类实用程序 UIView. 为了 Swift 这将是：

import UIKit



class HairlineView: UIView {

 override func awakeFromNib// {

 guard let backgroundColor = self.backgroundColor?.CGColor else { return }

 self.layer.borderColor = backgroundColor

 self.layer.borderWidth = /1.0 / UIScreen.mainScreen//.scale/ / 2;

 self.backgroundColor = UIColor.clearColor//

 }

}

对于水平线

UIView *horizontalLine = [[UIView alloc]initWithFrame:CGRectMake/x cordinate,y cordinate,1,linelenth/];

horizontalLine.backgroundColor = [UIColor blackColor];

[self. view addSubView:horizontalLine];

[horizontalLine release];

对于垂直线

UIView *verticalLine = [[UIView alloc]initWithFrame:CGRectMake/x cordinate,y cordinate,linelenth,1/];

verticalLine.backgroundColor = [UIColor blackColor];

[self. view addSubView:verticalLine];

[verticalLine release];

试试吧

extension CALayer {



 func addBorder/edge: UIRectEdge, color: UIColor, thickness: CGFloat/ {



 let border = CALayer//



 switch edge {

 case .top:

 border.frame = CGRect/x: 0, y: 0, width: frame.width, height: thickness/

 case .bottom:

 border.frame = CGRect/x: 0, y: frame.height - thickness, width: frame.width, height: thickness/

 case .left:

 border.frame = CGRect/x: 0, y: 0, width: thickness, height: frame.height/

 case .right:

 border.frame = CGRect/x: frame.width - thickness, y: 0, width: thickness, height: frame.height/

 default:

 break

 }



 border.backgroundColor = color.cgColor;



 addSublayer/border/

 }

你可以退出它 UIView

- /void/drawRect:/CGRect/rect

{



//// General Declarations

CGContextRef context = UIGraphicsGetCurrentContext//;



//// Shadow Declarations

CGColorRef outerShadow = [UIColor blackColor].CGColor;

CGSize outerShadowOffset = CGSizeMake/0, 1/;

CGFloat outerShadowBlurRadius = 2;



//// Abstracted Graphic Attributes

CGRect rectangleFrame = CGRectMake/0, 0, self.frame.size.width, 3/;





//// Rectangle Drawing

UIBezierPath* rectanglePath = [UIBezierPath bezierPathWithRect: rectangleFrame];

[[UIColor lightGrayColor] setFill];

[rectanglePath fill];



////// Rectangle Inner Shadow

CGRect rectangleBorderRect = CGRectInset/[rectanglePath bounds], -outerShadowBlurRadius, -outerShadowBlurRadius/;

rectangleBorderRect = CGRectOffset/rectangleBorderRect, -outerShadowOffset.width, -outerShadowOffset.height/;

rectangleBorderRect = CGRectInset/CGRectUnion/rectangleBorderRect, [rectanglePath bounds]/, -1, -1/;



UIBezierPath* rectangleNegativePath = [UIBezierPath bezierPathWithRect: rectangleBorderRect];

[rectangleNegativePath appendPath: rectanglePath];

rectangleNegativePath.usesEvenOddFillRule = YES;



CGContextSaveGState/context/;

{

 CGFloat xOffset = outerShadowOffset.width + round/rectangleBorderRect.size.width/;

 CGFloat yOffset = outerShadowOffset.height;

 CGContextSetShadowWithColor/context,

 CGSizeMake/xOffset + copysign/0.1, xOffset/, yOffset + copysign/0.1, yOffset//,

 outerShadowBlurRadius,

 outerShadow/;



 [rectanglePath addClip];

 CGAffineTransform transform = CGAffineTransformMakeTranslation/-round/rectangleBorderRect.size.width/, 0/;

 [rectangleNegativePath applyTransform: transform];

 [[UIColor grayColor] setFill];

 [rectangleNegativePath fill];

}

CGContextRestoreGState/context/;

}

创建一个字符串 swift 从头开始，只是这样做

let line = UIView//

view.addSubview/line/

line.translatesAutoresizingMaskIntoConstraints = false

line.widthAnchor.constraint/equalToConstant: view.bounds.width - 40/.isActive = true

line.heightAnchor.constraint/equalToConstant: 1/.isActive = true

line.leftAnchor.constraint/equalTo: view.leftAnchor, constant: 20/.isActive = true

line.topAnchor.constraint/equalTo: userName.bottomAnchor,constant: 20/.isActive = true

line.backgroundColor = .gray

线宽等于设备的宽度 - 一些常量，左侧添加相同的常量，所以我们得到一个关于所以的一线