MKGradientView

Highly customizable Core Graphics based gradient view

Features

Available gradient types:

• Linear (Axial)
• Radial (Circular)
• Conical (Angular)
• Bilinear (Four Point)

Installation

CocoaPods

To install MKGradientView via CocoaPods, add the following line to your Podfile:

pod 'MKGradientView'

Carthage

To install MKGradientView via Carthage, add the following line to your Cartfile:

github "maxkonovalov/MKGradientView"

Usage

See example Xcode project

Interface Builder

Simple 2-color gradients can be set up in Interface Builder. Set your view's custom class to MKGradientView.

You can specify the following custom inspectable properties:

• Gradient Type
• Start Color
• End Color
• Start Point
• End Point

Code

let gradientView = GradientView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
gradientView.type = .linear
gradientView.colors = [.red, .green]
gradientView.locations = [0, 1]
gradientView.startPoint = CGPoint(x: 0, y: 0)
gradientView.endPoint = CGPoint(x: 1, y: 1)
view.addSubview(gradientView)

To set up a Bilinear gradient, you need to specify colors2 array:

let gradientView = GradientView(frame: CGRect(x: 100, y: 0, width: 100, height: 100))
gradientView.type = .bilinear
gradientView.colors = [.red, .yellow]
gradientView.colors2 = [.blue, .cyan]
view.addSubview(gradientView)

Performance

GradientLayer is image-backed, and the algorithm performance behind it highly depends on the size of the generated image. To speed it up, minimum possible layer size should be used. It can be adjusted with GradientLayer's contentsScale property, 1.0 being an optimal value for performance/quality balance. Use lower values like 0.5 to speed up rendering time or set it equal to UIScreen.main.scale to get precise result.

Requirements

• iOS 8.0
• Xcode 10, Swift 4+

License

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