MKRingProgressView

Ring progress view similar to Activity app on Apple Watch

Features

Progress animation
Customizable start/end and backdrop ring colors
Customizable ring width
Customizable progress line end style
Customizable shadow under progress line end
Progress values above 100% (or 360°) can also be displayed

Installation

CocoaPods

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

pod 'MKRingProgressView'

Carthage

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

github "maxkonovalov/MKRingProgressView"

Swift Package Manager

Note: Instructions below are for using SwiftPM without the Xcode UI. It's the easiest to go to your Project Settings -> Swift Packages and add MKRingProgressView from there.

To integrate using Apple's Swift package manager, without Xcode integration, add the following as a dependency to your Package.swift:

.package(url: "https://github.com/maxkonovalov/MKRingProgressView.git", .upToNextMajor(from: "2.3.0"))

Usage

See the example Xcode project. It contains 2 targets:

ProgressRingExample - a simple example containing a single progress ring with adjustable parameters.
ActivityRingsExample - an advanced usage example replicating Activity app by Apple. It also contains additional classes for convenient grouping of 3 ring progress views together.

Interface Builder

MKRingProgressView can be set up in Interface Builder. To use it, set the custom view class to MKRingProgressView. Most of the control's parameters can be customized in Interface Builder.

Code

let ringProgressView = RingProgressView(frame: CGRect(x: 0, y: 100, width: 100, height: 100))
ringProgressView.startColor = .red
ringProgressView.endColor = .magenta
ringProgressView.ringWidth = 25
ringProgressView.progress = 0.0
view.addSubview(ringProgressView)

The progress value can be animated the same way you would normally animate any property using UIView's block-based animations:

UIView.animate(withDuration: 0.5) {
    ringProgressView.progress = 1.0
}

Performance

To achieve better performance the following options are possible:

Set gradientImageScale to lower values like 0.5 (defaults to 1.0)
Set startColor and endColor to the same value
Set shadowOpacity to 0.0
Set allowsAntialiasing to false

Requirements

iOS 9.0
tvOS 9.0

License

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

tidepool-org/MKRingProgressView