1.數據源
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.隨機生成驗證碼
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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.創建放置驗證碼的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是隨便畫幾條細線
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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的邊框色 layer.lineWidth = 1.0 layer.strokeEnd = 1 layer.fillColor = UIColor.clear.cgColor layer.path = path.cgPath bgView.layer.addSublayer(layer) } |
5.調用方法及回調
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public func refreshCode(callBack: @escaping (_ str: NSString) -> ()) { initCodeView() callBack(codeStr) } |
6.效果圖
以上所述是小編給大家介紹的iOS 生成圖片驗證碼(實用功能)，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對服務器之家網站的支持！
原文鏈接：http://blog.csdn.net/three_zhang/article/details/60577916
