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iOS 生成图片验证码(实用功能)

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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 。

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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 。

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for i in 0 ..<codeStr.length {
       let pxx = arc4random() % UInt32(randWidth)
       let px = CGFloat(pxx) + CGFloat(i)*(self.frame.size.width- 3 )/CGFloat(codeStr.length)
       let py = arc4random() % UInt32(randHeight)
       let label = UILabel.init(frame: CGRect.init(x: px + 3 , y: CGFloat(py), width: textSize.width, height: textSize.height))
       label.text = String.init(format: "%C" , codeStr.character(at: i))
       label.font = UIFont.systemFont(ofSize: 20 )
       if (isRotation == true ) {
         let a = arc4random() % UInt32( 60 )
         let r = Double(a)- 30
         label.transform = CGAffineTransform.init(rotationAngle: CGFloat(r*M_PI)/ 180 )
       }
       bgView.addSubview(label)
     }

4.底部view是随便画几条细线 。

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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 。

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

6.效果图 。

iOS 生成图片验证码(实用功能)

7.源码地址 。

以上所述是小编给大家介绍的iOS 生成图片验证码(实用功能),希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对我网站的支持! 。

原文链接:http://blog.csdn.net/three_zhang/article/details/60577916 。

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