Ios 用UIView和CAShapeLayer形成一个三角形
来自教程:Ios 用UIView和CAShapeLayer形成一个三角形,ios,swift,xcode,cashapelayer,Ios,Swift,Xcode,Cashapelayer,来自教程:http://swiftiostutorials.com/tutorial-draw-nice-triangle-view-border-cashapelayer/,我成功地创建了一个三角形,如: 但我试图实现的是一个三角形,如: 如何做到这一点 改用此路径: CGPathMoveToPoint(path, nil, 0, 0) CGPathAddLineToPoint(path, nil, width, 0) CGPathAddLineToPoint(path, nil, wid
http://swiftiostutorials.com/tutorial-draw-nice-triangle-view-border-cashapelayer/
,我成功地创建了一个三角形,如:
但我试图实现的是一个三角形,如:
如何做到这一点 改用此路径:
CGPathMoveToPoint(path, nil, 0, 0)
CGPathAddLineToPoint(path, nil, width, 0)
CGPathAddLineToPoint(path, nil, width/2, height)
CGPathAddLineToPoint(path, nil, 0, 0)
全班:
class Triangle: UIView {
override func drawRect(rect: CGRect) {
let mask = CAShapeLayer()
mask.frame = self.layer.bounds
let width = self.layer.frame.size.width
let height = self.layer.frame.size.height
let path = CGPathCreateMutable()
CGPathMoveToPoint(path, nil, 0, 0)
CGPathAddLineToPoint(path, nil, width, 0)
CGPathAddLineToPoint(path, nil, width/2, height)
CGPathAddLineToPoint(path, nil, 0, 0)
mask.path = path
self.layer.mask = mask
}
}
啊,没有注意到额外的
CGPathAddLineToPoint
。谢谢,伙计!
class Triangle: UIView {
override func drawRect(rect: CGRect) {
let mask = CAShapeLayer()
mask.frame = self.layer.bounds
let width = self.layer.frame.size.width
let height = self.layer.frame.size.height
let path = CGPathCreateMutable()
CGPathMoveToPoint(path, nil, 0, 0)
CGPathAddLineToPoint(path, nil, width, 0)
CGPathAddLineToPoint(path, nil, width/2, height)
CGPathAddLineToPoint(path, nil, 0, 0)
mask.path = path
self.layer.mask = mask
}
}