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 ~