iOS 生成图片验证码(实用功能)

1.数据源

codeArray = ["0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

2.随机生成验证码

for index in 0..<4 {
      let i = (Int)(arc4random()) % (codeArray.count-1)
      let str = codeArray[i]
      if index == 0 {
 codeStr = str as NSString
      }else {
 codeStr = "(codeStr)(str)" as NSString
      }
    }

3.创建放置验证码的label

for i in 0..

4.底部view是随便画几条细线

for _ in 0...9 {
      let path = UIBezierPath.init()
      let pX = arc4random() % UInt32(self.frame.width)
      let pY = arc4random() % UInt32(self.frame.height)
      path.move(to: CGPoint.init(x: CGFloat(pX), y: CGFloat(pY)))
      let ptX = arc4random() % UInt32(self.frame.width)
      let ptY = arc4random() % UInt32(self.frame.height)
      path.addLine(to: CGPoint.init(x: CGFloat(ptX), y: CGFloat(ptY)))
      let layer = CAShapeLayer.init()
      layer.strokeColor = UIColor.getRandomColor(withAlpha: 0.2).cgColor//layer的边框色
      layer.lineWidth = 1.0
      layer.strokeEnd = 1
      layer.fillColor = UIColor.clear.cgColor
      layer.path = path.cgPath
      bgView.layer.addSublayer(layer)
    }

5.调用方法及回调

public func refreshCode(callBack: @escaping (_ str: NSString) -> ()) {
    initCodeView()
    callBack(codeStr)
  }

6.效果图

7.源码地址
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