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..<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

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

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