extension UIView {

enum BorderPosition: Int {

case top

case bottom

case left

case right

}

/// 圆角边框

/// - Parameters:

/// - maskedCorners: 圆角位置

/// - cornerRadius: 圆角大小

/// - borderColor: 边框颜色

/// - borderWidth: 边框宽度

func corner(maskedCorners: CACornerMask, cornerRadius: CGFloat, borderColor: UIColor = .clear, borderWidth: CGFloat = 0) {

layer.masksToBounds = true

layer.cornerRadius = cornerRadius

layer.borderColor = borderColor.cgColor

layer.borderWidth = borderWidth

if maskedCorners != [] {

layer.maskedCorners = maskedCorners

}

}

/// 圆角边框虚线

/// - Parameters:

/// - rect: frame

/// - corner: 圆角位置

/// - cornerRadius: 圆角大小

/// - borderColor: 边框颜色

/// - borderWidth: 边框宽度

/// - lineDashPattern: 虚线

func corner(clipRect rect: CGRect, corner: UIRectCorner = .allCorners, cornerRadius: CGFloat = 0, borderColor: UIColor = .clear, borderWidth: CGFloat = 0, lineDashPattern: [NSNumber] = []) {

let path = UIBezierPath(roundedRect: rect, byRoundingCorners: corner, cornerRadii: CGSize(width: cornerRadius, height: cornerRadius))

let maskLayer = CAShapeLayer()

maskLayer.path = path.cgPath

layer.mask = maskLayer

let borderLayer = CAShapeLayer()

borderLayer.path = path.cgPath

borderLayer.lineWidth = borderWidth * 2

borderLayer.fillColor = UIColor.clear.cgColor

borderLayer.strokeColor = borderColor.cgColor

borderLayer.lineDashPattern = lineDashPattern

layer.addSublayer(borderLayer)

}

/// 边框

/// - Parameters:

/// - position: 边框位置

/// - borderColor: 边框颜色

/// - borderWidth: 边框宽度

func border(position: [BorderPosition], borderColor: UIColor, borderWidth: CGFloat) {

for p in position {

let borderLayer = CAShapeLayer()

borderLayer.backgroundColor = borderColor.cgColor

layer.addSublayer(borderLayer)

switch p {

case .top:

borderLayer.frame = CGRect(x: 0, y: 0, width: frame.width, height: borderWidth)

case .bottom:

borderLayer.frame = CGRect(x: 0, y: frame.height - borderWidth, width: frame.width, height: borderWidth)

case .left:

borderLayer.frame = CGRect(x: 0, y: 0, width: borderWidth, height: frame.height)

case .right:

borderLayer.frame = CGRect(x: frame.width - borderWidth, y: 0, width: borderWidth, height: frame.height)

}

}

}

/// 阴影

/// - Parameters:

/// - color: 阴影颜色

/// - offset: 阴影偏移量，默认{0， -3}。(width和height都为0(CGSize.zero)，阴影在四周。width为负值，阴影朝左。width为正值，阴影朝右。height为负值，阴影朝上。height为正值，阴影朝下。)

/// - radius: 阴影模糊度

/// - opacity: 阴影透明度

func shadow(color: UIColor, offset: CGSize, radius: CGFloat, opacity: Float) {

layer.shadowColor = color.cgColor

layer.shadowOffset = offset

layer.shadowRadius = radius

layer.shadowOpacity = opacity

}

}

图片

#import "UIImageView+CircleImage.h"

@implementation UIImageView (CircleImage)

- (void)circleImage:(CGFloat)cornerRadius {

UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, 1.0);

[[UIBezierPath bezierPathWithRoundedRect:self.bounds cornerRadius:cornerRadius] addClip];

[self.image drawInRect:self.bounds];

self.image = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

}

- (void)circleImage:(CGFloat)cornerRadius rectCorner:(UIRectCorner)rectCorner {

self.contentMode = UIViewContentModeScaleAspectFill;

CAShapeLayer *shapeLayer = [CAShapeLayer layer];

shapeLayer.backgroundColor = [UIColor clearColor].CGColor;

shapeLayer.path = [UIBezierPath bezierPathWithRoundedRect:self.bounds byRoundingCorners:rectCorner cornerRadii:CGSizeMake(cornerRadius, cornerRadius)].CGPath;

self.layer.masksToBounds = YES;

self.layer.mask = shapeLayer;

shapeLayer.frame = self.layer.bounds;

}

@end

#import "UIImage+CircleImage.h"

@implementation UIImage (CircleImage)

/**

contentMode = UIViewContentModeScaleToFill

*/

- (UIImage *)circleImage {

UIGraphicsBeginImageContextWithOptions(self.size, NO, 0.0);

CGContextRef ctx = UIGraphicsGetCurrentContext();

CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);

CGContextAddEllipseInRect(ctx, rect);

CGContextClip(ctx);

[self drawInRect:rect];

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return image;

}

@end

UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];

imageView.image = [UIImage imageNamed:@"image"];

[self.view addSubview:imageView];

UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:imageView.bounds byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerTopRight cornerRadii:CGSizeMake(28, 28)];

CAShapeLayer *layer = [CAShapeLayer layer];

layer.path = path.CGPath;

imageView.layer.mask = layer;

文字

UILabel *lable = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];

lable.text = @"测试文本";

lable.backgroundColor = [UIColor cyanColor];

[self.view addSubview:lable];

UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:lable.bounds byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerTopRight cornerRadii:CGSizeMake(28, 28)];

CAShapeLayer *layer = [CAShapeLayer layer];

layer.path = path.CGPath;

lable.layer.mask = layer;

UIBezierPath

class SpView: UIView {

override init(frame: CGRect) {

super.init(frame: frame)

backgroundColor = .clear

}

required init?(coder: NSCoder) {

fatalError("init(coder:) has not been implemented")

}

override func draw(_ rect: CGRect) {

let points = [

CGPoint(x: bounds.width * 0.5 - 9, y: bounds.height - 8),

CGPoint(x: bounds.width * 0.5 + 9, y: bounds.height - 8),

CGPoint(x: bounds.width * 0.5, y: bounds.height)

]

let path = UIBezierPath(roundedRect: CGRect(x: 0, y: 0, width: bounds.width, height: bounds.height - 8), cornerRadius: 16)

path.move(to: points[0])

for i in 1..

path.addLine(to: points[i])

}

UIColor.white.set()

path.stroke()

path.fill()

let shadowPath = UIBezierPath(roundedRect: CGRect(x: 0, y: 0, width: bounds.width, height: bounds.height - 8), cornerRadius: 16)

layer.shadowColor = UIColor.red.cgColor

layer.shadowOffset = .zero

layer.shadowRadius = 12

layer.shadowOpacity = 1

shadowPath.move(to: points[0])

for i in 1..

shadowPath.addLine(to: points[i])

}

layer.shadowPath = shadowPath.cgPath

}

}

image.png