BezierPathLength 1.1.0

BezierPathLength 1.1.0

LangLanguage SwiftSwift
License MIT
ReleasedLast Release Dec 2016
SwiftSwift Version 3.0.2
SPMSupports SPM

Maintained by Louis Dhauwe.

[UI/NS]BezierPath + Length

Code Climate

This project provides a simple API to get the length of either a UIBezierPath or NSBezierPath. Example:

let rect = CGRect(origin: .zero, size: CGSize(width: 100, height: 300))
let path = UIBezierPath(ovalIn: rect)

// Length in pt.
let length = path.length

There's also an API for getting a point on a path at a certain percentage, example:

// CGPoint at 50% of path
let point = path.point(at: 0.5)


  • iOS 8.0+ / macOS 10.9+ / tvOS 9.0+ / watchOS 2.0+
  • Xcode 8.2+

How does it work?

The actual calculations are implemented on a CGPath extension, but a [UI/NS]BezierPath extension is available for convenience.

Any CGPath can be split into subpaths. Of which there are three types:

  • Linear
  • Quadratic curve
  • Cubic curve

See for a detailed mathematical explanation of how the length of these three can be calculated.


This project is available under the MIT license. See the LICENSE file for more info.