LBXScanLineAnimation.swift
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//
// LBXScanLineAnimation.swift
// swiftScan
//
// Created by lbxia on 15/12/9.
// Copyright © 2015年 xialibing. All rights reserved.
//
import UIKit
class LBXScanLineAnimation: UIImageView {
var isAnimationing = false
var animationRect = CGRect.zero
func startAnimatingWithRect(animationRect: CGRect, parentView: UIView, image: UIImage?) {
self.image = image
self.animationRect = animationRect
parentView.addSubview(self)
isHidden = false
isAnimationing = true
if image != nil {
stepAnimation()
}
}
@objc func stepAnimation() {
guard isAnimationing else {
return
}
var frame = animationRect
let hImg = image!.size.height * animationRect.size.width / image!.size.width
frame.origin.y -= hImg
frame.size.height = hImg
self.frame = frame
alpha = 0.0
UIView.animate(withDuration: 1.4, animations: {
self.alpha = 1.0
var frame = self.animationRect
let hImg = self.image!.size.height * self.animationRect.size.width / self.image!.size.width
frame.origin.y += (frame.size.height - hImg)
frame.size.height = hImg
self.frame = frame
}, completion: { _ in
self.perform(#selector(LBXScanLineAnimation.stepAnimation), with: nil, afterDelay: 0.3)
})
}
func stopStepAnimating() {
isHidden = true
isAnimationing = false
}
public static func instance() -> LBXScanLineAnimation {
return LBXScanLineAnimation()
}
deinit {
stopStepAnimating()
}
}