我想绘制一些形状,如某人的签名或其他一些写意形状.
我是UIBezierPath的新手.我尝试过以下代码,但它没有按照我的意愿运行.
我是UIBezierPath的新手.我尝试过以下代码,但它没有按照我的意愿运行.
怎么可能呢？
TIA
let path = UIBezierPath()
path.move(to: from)
path.addLine(to: to)
let shapeLayer = CAShapeLayer()
shapeLayer.path = path.cgPath
shapeLayer.strokeColor = lineColor.cgColor
shapeLayer.linewidth = 1.0
view.layer.addSublayer(shapeLayer)
解决方法
你好@Rajinder为此你必须获得接触点,所以你必须使用
以下方法.
以下方法.
override func touchesBegan(_ touches: Set<UITouch>,with event:
UIEvent?)
{
let touch = event?.alltouches?.first
let touchLocation: CGPoint? = touch?.location(in: self.view)
//---Declare "from" globally as CGPoint
from = CGPoint(x: (touchLocation?.x)!,y: (touchLocation?.y)!)
}
override func touchesMoved(_ touches: Set<UITouch>,with event: UIEvent?) {
let touch = event?.alltouches?.first
let touchLocation: CGPoint? = touch?.location(in: self.view)
//--Get New touch point
let to = CGPoint(x: (touchLocation?.x)!,y: (touchLocation?.y)!)
//--Draw line
drawLineFromPoint(from: from,to: to,ofColor: UIColor.red,inView: self.view)
//--Save as older point
from = to
}
func drawLineFromPoint(from : CGPoint,to:CGPoint,ofColor lineColor: UIColor,inView view:UIView)
{
//design the path
let path = UIBezierPath()
path.move(to: from)
path.addLine(to: to)
//design path in layer
let shapeLayer = CAShapeLayer()
shapeLayer.path = path.cgPath
shapeLayer.strokeColor = lineColor.cgColor
shapeLayer.linewidth = 1.0
view.layer.addSublayer(shapeLayer)
}