acumen1005 / ACLabelCounting

Adds animated counting to UILabel for swift

ACLabelCounting

中文版

Adds animated counting to UILabel for swift

Installation

To integrate ACLabelCounting into your Xcode project using CocoaPods, specify it in your Podfile:

pod 'ACLabelCounting'

Usage

You can initialize an ACLabelCounting, and call mehtod count , then you get an animated counting label

Linear animation of counts from 0 to 100, data type is integer

label.count(to: 100)

Count animation from 10 to 100. Duration is 5 seconds. Animation type is fade-in effect. Data type is Double.

label.count(from: 10,
            to: 100,
            duration: 5,
            animationType: .EaseIn,
            dataType: .Double)

Counting animation from 0 to 100, duration is 5 seconds, animation type is fade-out effect, data type is Int type. String formatting adds a % to the end of the string.

label.count(from: 0,
            to: 100,
            duration: 5,
            animationType: .EaseOut,
            dataType: .Int) { txt in
                return "\(txt) %"
        }

Count animation from 0 to 100. Duration is 5 seconds. Animation type is fade-in effect. Data type is Int. String formatting is to add / 100 to the string face, and its color is bright gray.

label.count(from: 0,
                    to: 100,
                    duration: 5,
                    animationType: .EaseIn,
                    dataType: .Int) { text -> NSAttributedString in
                        let appandString = " / 100"
                        let string = "\(text)\(appandString)"
                        let range = (string as NSString).range(of: appandString)

                        let attributedString = NSMutableAttributedString(string: string)
                        attributedString.addAttribute(NSForegroundColorAttributeName,
                                                      value: UIColor.lightGray,
                                                      range: range)
                        return attributedString;
        }

That's all. If you want to add more powerful features, please post an issue for me.

Source Analytics

the enum of datatype

enum ACLabelCountingDataType {
    case Int
    case Double
}

the types of counting animation : no effect (same as linear), linear, fade-in, fade-out, fade-in.

enum ACLabelCountingAnimationType {
    case None
    case Liner
    case EaseIn
    case EaseOut
    case EaseInOut
}

Their corresponding functions:

extension ACLabelCounting {
    func liner(progress: Double, totle: Double) -> Double {
        return progress / totle
    }

    func easeIn(progress: Double, totle: Double) -> Double {
        return pow(progress / totle, 3)
    }

    func easeOut(progress: Double, totle: Double) -> Double {
        let t = progress / totle
        return  1 - pow(1 - t, 3)
    }

    func easeInOut(progress: Double, totle: Double) -> Double {
        let t = progress / totle
        return t < 0.5 ? 4 * t * t * t : (t - 1) * (2 * t - 2) * (2 * t - 2) + 1
    }
}

ACLabelCountting has 5 operations：

• start()
• pause()
• restore()
• stop()
• reset()

The key is to use the CADisplayLink timer to execute the updateNumber task at a rate of 35 times per second and add it to the Runloop in .commonModes mode.

private func fireDisplayLink() {
        lastUpdate = CACurrentMediaTime()
        displayLink = CADisplayLink(target: self, selector: #selector(updateNumber))
        displayLink.preferredFramesPerSecond = LabelCountingConst.countRate
        displayLink.add(to: RunLoop.main, forMode: .commonModes)
    }

It has two simple custom closures: formatTextClosure and attributedTextClosure. You can implement string processing yourself. It will all appear on your screen.

private var formatTextClosure: ((String) -> String) = { text -> String in return text }

private var attributedTextClosure: ((String) -> NSAttributedString)?

Thanks

https://github.com/dataxpress/UICountingLabel
it is a repo for swift. Thanks ~