swift - How to rounded the corners when I draw rectangle using UIBezierPath points -

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i crated rectangle using uibezierpath adding point point, want rounded corners of rectangle seems there no way it. can me ?

class rectanglelayer: cashapelayer {      let animationduration: cftimeinterval = 0.5      override init() {         super.init()         fillcolor = colors.clear.cgcolor         linewidth = 5.0         path = rectanglepathstart.cgpath     }      required init?(coder adecoder: nscoder) {         fatalerror("init(coder:) has not been implemented")     } var rectanglepathstart: uibezierpath {         let rectanglepath = uibezierpath()         rectanglepath.movetopoint(cgpoint(x: 0.0, y: 100.0))         rectanglepath.addlinetopoint(cgpoint(x: 0.0, y: -linewidth))         rectanglepath.addlinetopoint(cgpoint(x: 100.0, y: -linewidth))         rectanglepath.addlinetopoint(cgpoint(x: 100.0, y: 100.0))         rectanglepath.addlinetopoint(cgpoint(x: -linewidth / 2, y: 100.0))          rectanglepath.closepath()  //        fillcolor = colors.red.cgcolor         return rectanglepath     } }

if want create rounded rectangle, can use 

let rectangle = cgrect(x: 0, y: 0, width: 100, height: 100) let path = uibezierpath(roundedrect: rectangle, cornerradius: 20)

enter image description here

if want round of corners, not others, can use

let rectangle = cgrect(x: 0, y: 0, width: 100, height: 100) let path = uibezierpath(roundedrect: rectangle, byroundingcorners: [.topleft, .bottomright], cornerradii: cgsize(width: 35, height: 35))

enter image description here

if want have different corner radius each corner, you'll have add arc each circle individually. comes down calculating center , start , end angle of each arc. you'll find center of each arc inset corner radius corresponding corner of rectangle. example, center of top left corner 

cgpoint(x: rectangle.minx + upperleftradius, y: rectangle.miny + upperleftradius)

the start , end angle each arc either straight left, up, down, or right. angles corresponding these directions can seen in uibezierpath documentation.

enter image description here

if need create many rectangles this, can create convenience initializer it

extension uibezierpath {     convenience init(roundedrect rect: cgrect, topleftradius r1: cgfloat, toprightradius r2: cgfloat, bottomrightradius r3: cgfloat, bottomleftradius r4: cgfloat) {         let left  = cgfloat(m_pi)         let    = cgfloat(1.5*m_pi)         let down  = cgfloat(m_pi_2)         let right = cgfloat(0.0)         self.init()         addarcwithcenter(cgpoint(x: rect.minx + r1, y: rect.miny + r1), radius: r1, startangle: left,  endangle: up,    clockwise: true)         addarcwithcenter(cgpoint(x: rect.maxx - r2, y: rect.miny + r2), radius: r2, startangle: up,    endangle: right, clockwise: true)         addarcwithcenter(cgpoint(x: rect.maxx - r3, y: rect.maxy - r3), radius: r3, startangle: right, endangle: down,  clockwise: true)         addarcwithcenter(cgpoint(x: rect.minx + r4, y: rect.maxy - r4), radius: r4, startangle: down,  endangle: left,  clockwise: true)         closepath()     } }

and use this

let path = uibezierpath(roundedrect: rectangle, topleftradius: 30, toprightradius: 10, bottomrightradius: 15, bottomleftradius: 5)

enter image description here


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