这是我的代码
func drawSmallCircles(){
for oneArray in points {
let startAngleRadiant: CGFloat = degreesToRadians(Double(oneArray[0]))
let endAngleRadiant: CGFloat = degreesToRadians(Double(oneArray[1]))
let radius: CGFloat = 100.0
let path = UIBezierPath(arcCenter: center,
radius: radius,
startAngle: startAngleRadiant,
endAngle: endAngleRadiant,
clockwise: true)
let color = UIColor(red: CGFloat(55), green: CGFloat(37), blue: CGFloat(23), alpha: CGFloat(1))
path.fill()
color.setFill()
path.lineWidth = CGFloat(10)
path.stroke()
setNeedsDisplay()
}
}
如你所见,我有自定义颜色。我的问题是颜色总是黑色。
见
override func drawRect(rect: CGRect) {
self.opaque = false;
drawSmallCircles()
}
这是我的drawRec
let points = [[270, 290],[300, 320],[330, 350],[0, 20],[30, 50],[60, 80],[90, 110],[120, 140],[150, 170],[180, 200],[210, 230],[240, 260]]
func drawSmallCircles(){
for oneArray in points {
let startAngleRadiant: CGFloat = degreesToRadians(Double(oneArray[0]))
let endAngleRadiant: CGFloat = degreesToRadians(Double(oneArray[1]))
let radius: CGFloat = 50.0
let path = UIBezierPath(arcCenter: CGPoint(x: CGFloat(100), y: CGFloat(100)),
radius: radius,
startAngle: startAngleRadiant,
endAngle: endAngleRadiant,
clockwise: true)
let color = UIColor(red: CGFloat(55/255), green: CGFloat(37/255), blue: CGFloat(23/255), alpha: CGFloat(1))
// path.fill()
color.setStroke()
path.lineWidth = CGFloat(10)
path.stroke()
// setNeedsDisplay()
}
}
override func drawRect(rect: CGRect) {
self.opaque = false;
drawSmallCircles()
}
但仍然是相同的黑色,
我做了你说的,我在颜色上调用了setStock方法,我将颜色值更改为255之间的
答案 0 :(得分:1)
如果您参考initWithRed:green:blue:alpha:
的文档,则会指出这些文档应为0.0
和1.0
之间的值。
此外,您永远不会致电setStroke
来设置线条颜色。您调用color.setStroke()
来设置颜色,然后调用path.stroke()
以先前指定的颜色绘制笔划。
-
您可能需要以下内容:
func drawSmallCircles(){
for oneArray in points {
let startAngleRadiant: CGFloat = degreesToRadians(Double(oneArray[0]))
let endAngleRadiant: CGFloat = degreesToRadians(Double(oneArray[1]))
let radius: CGFloat = 100.0
let path = UIBezierPath(arcCenter: center, radius: radius, startAngle: startAngleRadiant, endAngle: endAngleRadiant, clockwise: true)
let color = UIColor(red: 55.0/255.0, green: 37.0/255.0, blue: 23.0/255.0, alpha: 1.0)
color.setStroke()
path.lineWidth = CGFloat(10)
path.stroke()
}
}
请注意,这是一种非常暗的颜色,所以它可能看起来很黑。您可能希望减轻它(使用接近1.0
的几个值)以更清楚地看到颜色。