本文实例为大家分享了swift圆环进度提示效果的实现代码,供大家参考,具体内容如下
效果图:
实现代码:
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/
// ViewController.swift
// PureSwiftAuto
//
// Created by 王木木 on 16/5/17.
// 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" )
}
}
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以上就是本文的全部内容,希望对大家的学习有所帮助。