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//
// QRCodeMaskView.swift
// PaiAi-Guide
//
// Created by FFIB on 2017/1/20.
// Copyright © 2017年 FFIB. All rights reserved.
//
import UIKit
let qrcodeAnimation = "com.QR.gradient"
class QRCodeMaskView: UIView {
var configuration = QRCodeConfiguration() {
didSet {
layoutIfNeeded()
}
}
fileprivate var cornerLineWidth: CGFloat {
return configuration.cornerLineWidth
}
fileprivate var cornerLineLength: CGFloat {
return configuration.cornerLineLength
}
fileprivate var cornerLineColor: UIColor {
return configuration.cornerLineColor
}
fileprivate var gradientColor: UIColor {
return configuration.gradientColor
}
fileprivate var cornerLineSpace: CGFloat = 1.0
fileprivate var cornerLineDistance: CGFloat = 1.0
fileprivate let animation = { () -> CABasicAnimation in
let animation = CABasicAnimation(keyPath: "position.y")
animation.repeatCount = 100000
animation.isRemovedOnCompletion = false
animation.duration = 2
animation.fillMode = CAMediaTimingFillMode.forwards
return animation
}()
fileprivate let gradientLayer = CAGradientLayer()
func stopAnimation() {
let pauseTime = gradientLayer.convertTime(CACurrentMediaTime(), to: nil)
gradientLayer.speed = 0.0
gradientLayer.timeOffset = pauseTime
}
func startAnimation() {
let pauseTime = gradientLayer.timeOffset
gradientLayer.speed = 1.0
gradientLayer.timeOffset = 0.0
gradientLayer.beginTime = 0.0
let timeSincePause = gradientLayer.convertTime(CACurrentMediaTime(), to: nil) - pauseTime
gradientLayer.beginTime = timeSincePause
}
override init(frame: CGRect) {
super.init(frame: frame)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
func setScanAnimation(clearRect: CGRect) {
let view = UIView(frame: clearRect)
view.clipsToBounds = true
addSubview(view)
gradientLayer.frame = CGRect(x: 0,
y: -48,
width: clearRect.width,
height: 48)
gradientLayer.colors = [UIColor(red: 150 / 255.0,
green: 150 / 255.0,
blue: 150 / 255.0,
alpha: 0.0).cgColor,
gradientColor.cgColor]
view.layer.addSublayer(gradientLayer)
animation.toValue = clearRect.height
gradientLayer.add(animation, forKey: qrcodeAnimation)
stopAnimation()
}
override func draw(_ rect: CGRect) { //swiftlint:disable:this function_body_length
let screenSize = CGSize(width: rect.width / 1.5,
height: rect.width / 1.5)
let clearRect = CGRect(x: (bounds.width - screenSize.width) / 2,
y: (bounds.height - screenSize.height) / 2,
width: screenSize.width,
height: screenSize.height)
setScanAnimation(clearRect: clearRect)
//set masking
let context = UIGraphicsGetCurrentContext()
context?.setFillColor(UIColor(red: 40 / 255.0,
green: 40 / 255.0,
blue: 40 / 255.0,
alpha: 0.2).cgColor)
context?.fill(frame)
context?.clear(clearRect)
context?.setLineWidth(cornerLineWidth)
context?.setStrokeColor(cornerLineColor.cgColor)
//the upper left corner
let pointUpperLeftA = [CGPoint(x: clearRect.origin.x - cornerLineDistance,
y: clearRect.origin.y - cornerLineDistance),
CGPoint(x: clearRect.origin.x - cornerLineDistance,
y: clearRect.origin.y + cornerLineLength - cornerLineDistance)]
let pointUpperLeftB = [CGPoint(x: clearRect.origin.x - cornerLineDistance - cornerLineSpace,
y: clearRect.origin.y - cornerLineDistance),
CGPoint(x: clearRect.origin.x + cornerLineLength - cornerLineDistance + cornerLineSpace,
y: clearRect.origin.y - cornerLineDistance)]
context?.addLines(between: pointUpperLeftA)
context?.addLines(between: pointUpperLeftB)
//the lower left corner
let pointLowerLeftA = [CGPoint(x: clearRect.origin.x - cornerLineDistance,
y: clearRect.origin.y + screenSize.height + cornerLineDistance),
CGPoint(x: clearRect.origin.x - cornerLineDistance,
y: clearRect.origin.y + screenSize.height - cornerLineLength + cornerLineDistance)] //swiftlint:disable:this line_length
let pointLowerLeftB = [CGPoint(x: clearRect.origin.x - cornerLineDistance - cornerLineSpace,
y: clearRect.origin.y + screenSize.height + cornerLineDistance),
CGPoint(x: clearRect.origin.x + cornerLineLength - cornerLineDistance + cornerLineSpace,
y: clearRect.origin.y + screenSize.height + cornerLineDistance)]
context?.addLines(between: pointLowerLeftA)
context?.addLines(between: pointLowerLeftB)
//the upper right corner
let pointUpperRightA = [CGPoint(x: clearRect.origin.x + screenSize.width + cornerLineDistance + cornerLineSpace,
y: clearRect.origin.y - cornerLineDistance),
CGPoint(x: clearRect.origin.x + screenSize.width - cornerLineLength + cornerLineDistance - cornerLineSpace, y: clearRect.origin.y - cornerLineDistance)] //swiftlint:disable:this line_length
let pointUpperRightB = [CGPoint(x: clearRect.origin.x + screenSize.width + cornerLineDistance,
y: clearRect.origin.y - cornerLineDistance),
CGPoint(x: clearRect.origin.x + screenSize.width + cornerLineDistance,
y: clearRect.origin.y + cornerLineLength - cornerLineDistance)]
context?.addLines(between: pointUpperRightA)
context?.addLines(between: pointUpperRightB)
//the lower right corrner
let pointLowerRightA = [CGPoint(x: clearRect.origin.x + screenSize.width + cornerLineDistance,
y: clearRect.origin.y + screenSize.height + cornerLineDistance),
CGPoint(x: clearRect.origin.x + screenSize.width + cornerLineDistance,
y: clearRect.origin.y + screenSize.height - cornerLineLength + cornerLineDistance)] //swiftlint:disable:this line_length
let pointLowerRightB = [CGPoint(x: clearRect.origin.x + screenSize.width + cornerLineDistance + cornerLineSpace,
y: clearRect.origin.y + screenSize.height + cornerLineDistance),
CGPoint(x: clearRect.origin.x + screenSize.width - cornerLineLength + cornerLineDistance - cornerLineDistance, y: clearRect.origin.y + screenSize.height + cornerLineDistance)] //swiftlint:disable:this line_length
context?.addLines(between: pointLowerRightA)
context?.addLines(between: pointLowerRightB)
context?.strokePath()
}
}
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