我想在一个上下文中画一条虚线和一条实线。但是如果我先画一条虚线,第二条线也是一条虚线。那么如何清理context.setLineDash
呢?我尝试了 context.beginContext()
,但没有用。
代码如下:
if let context = UIGraphicsGetCurrentContext() {
// The first line
let startPoint = CGPoint(x: 20, y: rect.height/2)
let endPoint = CGPoint(x: rect.width - 40, y: rect.height/2)
context.move(to: startPoint)
context.addLine(to: endPoint)
context.setLineWidth(1)
context.setLineDash(phase: 0, lengths: [4, 4])
context.setStrokeColor(UIColor.progressDashLineColor.cgColor)
context.strokePath()
// Second line
let startPoint1 = CGPoint(x: 20, y: rect.height/2 + 5)
let endPoint1 = CGPoint(x: rect.width-120, y: rect.height/2)
context.setStrokeColor(UIColor.mainColor.cgColor)
context.setLineWidth(5)
context.move(to: startPoint1)
context.addLine(to: endPoint1)
context.setLineCap(.round)
context.strokePath()
}
最佳答案
在绘制实线之前将虚线设置为空数组。
context.setLineDash(phase: 0, lengths: [])
来自 CGContext
文档:
Pass an empty array to clear the dash pattern so that all stroke drawing in the context uses solid lines.
关于swift - 在一个上下文中绘制实线和虚线,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46005023/