Fully customizable, circular progress bar written in Swift.

Example

To run the example project, clone the repo, and run pod install from the Example directory first. You can also view the example app at Appetize.io.

Usage

At the top of your file, make sure to import "ConcentricProgressRingView"

import ConcentricProgressRingView

Then, instantiate ConcentricProgressRingView in your view controller:

func viewDidLoad() {
    super.viewDidLoad()

    let fgColor1 = UIColor.yellow
    let bgColor1 = UIColor.darkGray
    let fgColor2 = UIColor.green
    let bgColor2 = UIColor.darkGray

    let rings = [
        ProgressRing(color: fgColor1, backgroundColor: bgColor1, width: 18),
        ProgressRing(color: fgColor2, backgroundColor: bgColor2, width: 18),
    ]

    let margin: CGFloat = 2
    let radius: CGFloat = 80
    let progressRingView = ConcentricProgressRingView(center: view.center, radius: radius, margin: margin, rings: rings)

    view.addSubview(progressRingView)
}

You can customize the width, margin, and radius, along with the number of rings. Here's another example with 6 progress rings, with a smaller bar width, larger margin between rings, and a larger radius:

let rings = [
    ProgressRing(color: fgColor1, backgroundColor: bgColor1, width: 10),
    ProgressRing(color: fgColor2, backgroundColor: bgColor2, width: 10),
    ProgressRing(color: fgColor1, backgroundColor: bgColor1, width: 10),
    ProgressRing(color: fgColor2, backgroundColor: bgColor2, width: 10),
    ProgressRing(color: fgColor1, backgroundColor: bgColor1, width: 10),
    ProgressRing(color: fgColor2, backgroundColor: bgColor2, width: 10),
]

let margin: CGFloat = 10
let radius: CGFloat = 120
let progressRingView = ConcentricProgressRingView(center: view.center, radius: radius, margin: margin, rings: rings)

Repeating widths can get a bit tedious, so you can omit them---but you'll still need to provide default values to the initializer. If you don't, the compiler will warn you that there's a problem. The initializer can throw if you provide invalid parameters, so you'll need to handle that.

let rings = [
    ProgressRing(color: fgColor1, backgroundColor: bgColor1),
    ProgressRing(color: fgColor2, backgroundColor: bgColor2),
    ProgressRing(color: fgColor1, backgroundColor: bgColor1),
    ProgressRing(color: fgColor2, backgroundColor: bgColor2),
    ProgressRing(color: fgColor1, backgroundColor: bgColor1),
    ProgressRing(color: fgColor2, backgroundColor: bgColor2),
]

let margin: CGFloat = 10
let radius: CGFloat = 120
let width: CGFloat = 8
let progressRingView = try? ConcentricProgressRingView(center: view.center, radius: radius, margin: margin, rings: rings, defaultColor: nil, defaultWidth: width)

Rings can have varying widths, colors, and background colors.

let rings = [
    ProgressRing(color: UIColor(.RGB(160, 255, 0)), backgroundColor: UIColor(.RGB(44, 66, 4)), width: 40),
    ProgressRing(color: UIColor(.RGB(255, 211, 0)), backgroundColor: UIColor(.RGB(85, 78, 0)), width: 20),
    ProgressRing(color: UIColor(.RGB(255, 28, 93))),
]
let progressRingView = try! ConcentricProgressRingView(center: view.center, radius: radius, margin: margin, rings: rings, defaultWidth: 30)

Updating Progress

To animate a progress update, use setProgress.

ring.arcs[1].setProgress(0.5, duration: 2)

You can also use subscripts to access the individual arcs.

ring[1].setProgress(0.5, duration: 2)

If you just want to change the progress, just set the progress on the ring, and it'll change immediately.

ring[1].progress = 0.5

If you'd like to update multiple rings simulataneously, you can iterate over ConcentricProgressRingView since it conforms to SequenceType.

for ring in progressRingView {
    ring.progress = 0.5
}

Requirements

Installation

ConcentricProgressRingView is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "ConcentricProgressRingView"

TODO

• Swift 3
• Documentation
• Tests

Author

Dan Loewenherz, [email protected]

License

ConcentricProgressRingView is available under the Apache 2.0 license. See the LICENSE file for more info.