swift实现自定义圆环进度提示效果-尊龙凯时

/
// viewcontroller.swift
// pureswiftauto
//
// created by 王木木 on 16/5/17.
// 尊龙凯时 copyright © 2016年 王木木. all rights reserved.
//
 
import uikit
 
class viewcontroller: uiviewcontroller {
   
  let cireview = cireview.newautolayoutview()
   
  override func viewdidload() {
    super.viewdidload()
    // do any additional setup after loading the view, typically from a nib.
    creatcire()
  }
   
  func creatcire(){
    self.view.addsubview(cireview)
    self.cireview.value = 2
    self.cireview.maximumvalue = 100
    self.cireview.backgroundcolor = uicolor.yellowcolor()
    self.cireview.frame = cgrectmake(100, 100, 100, 100)
    wangmumu()
  }
   
  func wangmumu(){
     
    self.cireview.value  = 2
     
    if self.cireview.value == 90 {return}
     
    self.performselector("wangmumu", withobject: self, afterdelay: 0.2)
     
  }
   
}
 
 
class cireview: uiview{
   
  var value: cgfloat = 0 {
    didset {
      self.setneedsdisplay()
    }
  }
   
  var maximumvalue: cgfloat = 0 {
    didset { self.setneedsdisplay() }
  }
  override init(frame: cgrect) {
    super.init(frame: frame)
    self.opaque = false
  }
   
   
  override func drawrect(rect: cgrect) {
    super.drawrect(rect)
     
    //线宽度
    let linewidth: cgfloat = 10.0
    //半径
    let radius = cgrectgetwidth(rect) / 2.0 - linewidth
    //中心点x
    let centerx = cgrectgetmidx(rect)
    //中心点y
    let centery = cgrectgetmidy(rect)
    //弧度起点
    let startangle = cgfloat(-90 * m_pi / 180)
    //弧度终点
    let endangle = cgfloat(((self.value / self.maximumvalue) * 360 - 90) ) * cgfloat(m_pi) / 180
     
    //创建一个画布
    let context = uigraphicsgetcurrentcontext()
     
    //画笔颜色
    cgcontextsetstrokecolorwithcolor(context, uicolor.bluecolor().cgcolor)
     
    //画笔宽度
    cgcontextsetlinewidth(context, linewidth)
     
    //（1）画布 （2）中心点x（3）中心点y（4）圆弧起点（5）圆弧结束点（6） 0顺时针 1逆时针
    cgcontextaddarc(context, centerx, centery, radius, startangle, endangle, 0)
     
    //绘制路径
    cgcontextstrokepath(context)
     
    //画笔颜色
    cgcontextsetstrokecolorwithcolor(context, uicolor.darkgraycolor().cgcolor)
     
    //（1）画布 （2）中心点x（3）中心点y（4）圆弧起点（5）圆弧结束点（6） 0顺时针 1逆时针
    cgcontextaddarc(context, centerx, centery, radius, startangle, endangle, 1)
     
    //绘制路径
    cgcontextstrokepath(context)
     
  }
   
  required init?(coder adecoder: nscoder) {
    fatalerror("init(coder:) has not been implemented")
  }
   
}