swift - 画图 - 画矩形，虚线，圆和半圆

Love The Way You Lie 2022-01-11 23:51 504阅读 0赞

![757124-20180814135422036-1922644402.png][]

import UIKit
    
    class JYJYBouncedCouponsViewCellBgView: UIView {
    
        //一定要在这里设置 背景色， 不要再draw里面设置， 
        override init(frame: CGRect) {
            super.init(frame: frame)
            self.backgroundColor = UIColor.clear
        }
        
        required init?(coder aDecoder: NSCoder) {
            fatalError("init(coder:) has not been implemented")
        }
        
        override func draw(_ rect: CGRect) {
            // 获取上下文
            guard let context = UIGraphicsGetCurrentContext() else {
                return
            }
            
            //画一个矩形, 带圆角的，填充色为FFE4C3，切圆角5
            UIColor.init(hexColor: "FFE4C3").set()
            context.addPath(UIBezierPath(roundedRect: rect, cornerRadius: 5).cgPath)
            context.fillPath()
            //填充色setFillColor , 画线的颜色setStrokeColor
    //        context.setFillColor(UIColor.init(hexColor: "FFE4C3").cgColor)
            
            // 画虚线
            /**设置起始和结束位置**/
            let startPointX: CGFloat = rect.size.width - 97
            let staerPointY: CGFloat = 0
            let endPointX: CGFloat = rect.size.width - 97
            let endPointY: CGFloat =  rect.size.height
            let path = CGMutablePath()
            path.move(to: CGPoint(x: startPointX, y: staerPointY))
            path.addLine(to: CGPoint(x: endPointX, y: endPointY))
            context.addPath(path)
            
            context.setStrokeColor(UIColor.init(hexColor: "FF8E00").cgColor)
            context.setLineWidth(1)
            /*
             phase参数表示在第一个虚线绘制的时候跳过多少个点
             lengths的值｛10,10｝表示先绘制10个点，再跳过10个点，如此反复
             如果把lengths值改为｛10, 20, 10｝，则表示先绘制10个点，跳过20个点，绘制10个点，跳过10个点，再绘制20个点，如此反复
             */
            context.setLineDash(phase: 0, lengths: [5,5])
            context.strokePath()
            
            // 画半圆
            UIColor.clear.set()
            /***设置圆心位置***/
            let circleY: CGFloat =  0
            let topCirclePoint: CGPoint = CGPoint(x: rect.size.width - 97, y: circleY)
            let bottomCenterPoint: CGPoint = CGPoint(x: rect.size.width - 97, y: rect.size.height)
            let topCircle = UIBezierPath(arcCenter: topCirclePoint, radius: 5, startAngle: -CGFloat.pi, endAngle: CGFloat.pi, clockwise: true)
            let bottpmCircle = UIBezierPath(arcCenter: bottomCenterPoint, radius: 5, startAngle: -CGFloat.pi, endAngle: CGFloat.pi, clockwise: true)
            context.setBlendMode(.clear)
            context.addPath(topCircle.cgPath)
            context.addPath(bottpmCircle.cgPath)
            context.fillPath()
        }
    
    }

转载于:https://www.cnblogs.com/qingzZ/p/9474223.html

[757124-20180814135422036-1922644402.png]: /images/20220109/d4e86150de244500b70c78f8bb85d09a.png