swift版的CircleView
效果图
源码
//
// CircleView.swift
// CircleView
//
// Created by YouXianMing on 15/10/7.
// Copyright © 2015年 YouXianMing. All rights reserved.
//
import UIKit
class CircleView: UIView {
// MARK: - 变量
var lineWidth : CGFloat = 1
var lineColor : UIColor = UIColor.blackColor()
var clockWise : Bool = false
var startAngle : CGFloat = 0
var duration : NSTimeInterval = 0.2
private var circleLayer : CAShapeLayer!
// MARK: - Public Method
/**
构建view,让参数生效
*/
func buildView() {
let size = bounds.size
let point = CGPoint(x: size.height / 2, y: size.width / 2)
let radius = size.width / 2 - lineWidth / 2
var tmpStartAngle : CGFloat = 0
var tmpEndAngle : CGFloat = 0
if (clockWise == true) {
tmpStartAngle = -radian(Double(180 - startAngle));
tmpEndAngle = radian(Double(180 + self.startAngle));
} else {
tmpStartAngle = radian(Double(180 - self.startAngle));
tmpEndAngle = -radian(Double(180 + self.startAngle));
}
let circlePath = UIBezierPath(arcCenter: point, radius: radius, startAngle: tmpStartAngle, endAngle: tmpEndAngle, clockwise: clockWise)
circleLayer.path = circlePath.CGPath
circleLayer.strokeColor = lineColor.CGColor
circleLayer.fillColor = UIColor.clearColor().CGColor
circleLayer.lineWidth = lineWidth
circleLayer.strokeEnd = 0
}
/**
绘制圆形百分比
- parameter percent: 百分比
- parameter animated: 是否开启动画
*/
func changeToPercent(var percent : CGFloat, animated : Bool) {
if (percent <= 0) {
percent = 0;
} else if (percent >= 1) {
percent = 1;
}
if (animated) {
let basicAnimation : CABasicAnimation! = CABasicAnimation()
basicAnimation.keyPath = "strokeEnd"
basicAnimation.duration = (duration <= 0 ? 0.2 : duration)
basicAnimation.fromValue = circleLayer.strokeEnd
basicAnimation.toValue = percent
circleLayer.strokeEnd = percent
circleLayer.addAnimation(basicAnimation, forKey: nil)
} else {
CATransaction.setDisableActions(true)
circleLayer.strokeEnd = percent
CATransaction.setDisableActions(false)
}
}
// MARK: - System Method
override init(frame: CGRect) {
super.init(frame: frame)
createCircleLayer()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
// MARK: - Private Method
private func radian(degrees : Double) -> CGFloat {
return CGFloat((M_PI * degrees) / 180)
}
private func createCircleLayer() {
circleLayer = CAShapeLayer()
circleLayer.frame = self.bounds
self.layer.addSublayer(circleLayer)
}
}//
// ViewController.swift
// CircleView
//
// Created by YouXianMing on 15/10/7.
// Copyright © 2015年 YouXianMing. All rights reserved.
//
import UIKit
class ViewController: UIViewController {
var eventTimer : NSTimer!
var circleView : CircleView!
override func viewDidLoad() {
super.viewDidLoad()
eventTimer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: "timerEvent", userInfo: nil, repeats: true)
circleView = CircleView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
circleView.lineWidth = 1
circleView.lineColor = UIColor.blackColor()
circleView.duration = 0.25
circleView.clockWise = true
circleView.startAngle = 90
circleView.center = view.center
circleView.buildView()
view.addSubview(circleView)
}
func timerEvent() {
circleView.changeToPercent(CGFloat(arc4random() % 101) / 100, animated: true)
}
}说明
参数查看并没有OC那么直白.
