大佬教程收集整理的这篇文章主要介绍了在iOS中创建Hexagon ImageView形状，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
- (UIBezierPath *)roundedPolygonPathWithRect:(CGRect)square
lineWidth:(CGFloat)lineWidth
sides:(NSInteger)sides
cornerRadius:(CGFloat)cornerRadius
{
UIBezierPath *path = [UIBezierPath bezierPath];
CGFloat theta = 2.0 * M_PI / sides; // how much to turn at every corner
CGFloat offset = cornerRadius * tanf(theta / 2.0); // offset from which to start rounding corners
CGFloat squareWidth = MIN(square.size.width,square.size.height); // width of the square
// calculate the length of the sides of the polygon
CGFloat length = squareWidth - lineWidth;
if (sides % 4 != 0) { // if not dealing with polygon which will be square with all sides ...
length = length * cosf(theta / 2.0) + offset/2.0; // ... offset it inside a circle inside the square
}
CGFloat sideLength = length * tanf(theta / 2.0);
// start drawing at `point` in lower right corner
CGFloat calc = squareWidth / 2.0 + sideLength / 2.0 - offset;
CGPoint point = CGPointMake(calc,squareWidth - (squareWidth - length) / 2.0);
CGFloat angle = M_PI;
[path moveToPoint:point];
// draw the sides and rounded corners of the polygon
for (NSInteger side = 0; side < sides; side++)
{
point = CGPointMake(point.x + (sideLength - offset * 2.0) * cosf(anglE),point.y + (sideLength - offset * 2.0) * sinf(anglE));
[path addLineToPoint:point];
CGPoint center = CGPointMake(point.x + cornerRadius * cosf(angle + M_PI_2),point.y + cornerRadius * sinf(angle + M_PI_2));
[path addArcWithCenter:center radius:cornerRadius startAngle:angle - M_PI_2 endAngle:angle + theta - M_PI_2 clockwise:YES];
point = path.currentPoint; // we don't have to calculate where the arc ended ... UIBezierPath did that for us
angle += theta;
}
[path closePath];
return path;
}
CGFloat lineWidth = 5.0;
UIBezierPath *path = [self roundedPolygonPathWithRect:cell.eventImageView.bounds
lineWidth:lineWidth
sides:6
cornerRadius:10];
CAShapeLayer *mask = [CAShapeLayer layer];
mask.path = path.CGPath;
mask.lineWidth = lineWidth;
mask.strokeColor = [UIColor clearColor].CGColor;
mask.fillColor = [UIColor whiteColor].CGColor;
cell.eventImageView.layer.mask = mask;
CAShapeLayer *border = [CAShapeLayer layer];
border.path = path.CGPath;
border.lineWidth = lineWidth;
border.strokeColor = [UIColor blackColor].CGColor;
border.fillColor = [UIColor clearColor].CGColor;
[cell.eventImageView.layer addSublayer:border];
请帮助我如何实现这一点,我从来没有使用过Bezier Paths.
提前致谢 ！
我不完全确定我的功能与你所使用的功能相同(因为我使用极坐标绘制多边形),而是产生的结果与你想要的相似.
public func roundedPolygonPath(rect: CGRect,lineWidth: CGFloat,sides: NSInteger,cornerRadius: CGFloat,rotationOffset: CGFloat = 0) -> UIBezierPath { let path = UIBezierPath() let theta: CGFloat = CGFloat(2.0 * M_PI) / CGFloat(sides) // How much to turn at every corner let offset: CGFloat = cornerRadius * tan(theta / 2.0) // Offset from which to start rounding corners let width = min(rect.size.width,rect.size.height) // Width of the square let center = CGPoint(x: rect.origin.x + width / 2.0,y: rect.origin.y + width / 2.0) // Radius of the circle that encircles the polygon // Notice that the radius is adjusted for the corners,that way the largest outer // dimension of the resulTing shape is always exactly the width - linewidth let radius = (width - lineWidth + cornerRadius - (cos(theta) * cornerRadius)) / 2.0 // Start drawing at a point,which by default is at the right hand edge // but can be offset var angle = CGFloat(rotationOffset) let corner = CGPointMake(center.x + (radius - cornerRadius) * cos(anglE),center.y + (radius - cornerRadius) * sin(anglE)) path.moveToPoint(CGPointMake(corner.x + cornerRadius * cos(angle + theta),corner.y + cornerRadius * sin(angle + theta))) for _ in 0..<sides { angle += theta let corner = CGPointMake(center.x + (radius - cornerRadius) * cos(anglE),center.y + (radius - cornerRadius) * sin(anglE)) let tip = CGPointMake(center.x + radius * cos(anglE),center.y + radius * sin(anglE)) let start = CGPointMake(corner.x + cornerRadius * cos(angle - theta),corner.y + cornerRadius * sin(angle - theta)) let end = CGPointMake(corner.x + cornerRadius * cos(angle + theta),corner.y + cornerRadius * sin(angle + theta)) path.addLineToPoint(start) path.addQuadCurveToPoint(end,controlPoint: tip) } path.closePath() // Move the path to the correct origins let bounds = path.bounds let transform = CGAffineTransformMakeTranslation(-bounds.origin.x + rect.origin.x + lineWidth / 2.0,-bounds.origin.y + rect.origin.y + lineWidth / 2.0) path.applyTransform(transform) return path }
例如,将rotationOffset设置为M_PI / 6.0,生成的形状将如下所示
以防万一,你可以看到我使用的完整的操场here
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