ios - Need a tip with UIBezierPath. Triangle Shape like Instagram Sign Up View -


i'm trying create bezier path instagram triangle in picture below, must doing wrong. bezier path not show!

- (void)viewdidload { [super viewdidload]; // additional setup after loading view.  }  -(void)viewdidlayoutsubviews{ [super viewdidlayoutsubviews];  [self drawtriangle];  }  - (ibaction)closebutton:(uibutton *)sender { [self dismissviewcontrolleranimated:yes completion:nil]; }  - (void)drawtriangle{  uibezierpath* trianglepath = [uibezierpath bezierpath]; [trianglepath movetopoint:cgpointmake(self.signupbutton.center.x, self.signupbutton.frame.origin.y + 30)]; [trianglepath addlinetopoint:cgpointmake(self.signupbutton.center.x - 10, self.imageview.frame.size.height)]; [trianglepath addlinetopoint:cgpointmake(self.signupbutton.center.x + 10, self.imageview.frame.size.height)];  uicolor *fillcolor = [uicolor whitecolor]; [fillcolor setfill]; uicolor *strokecolor = [uicolor whitecolor]; [strokecolor setstroke];   [trianglepath fill]; [trianglepath stroke];  [trianglepath closepath]; }

enter image description here

xcode 8.2.1 • swift 3.0.2

func drawtriangle(size: cgfloat, x: cgfloat, y: cgfloat, up:bool) {      let trianglelayer = cashapelayer()     let trianglepath = uibezierpath()     trianglepath.move(to: .zero)     trianglepath.addline(to: cgpoint(x: -size, y: ? size : -size))     trianglepath.addline(to: cgpoint(x: size, y: ? size : -size))     trianglepath.close()     trianglelayer.path = trianglepath.cgpath     trianglelayer.fillcolor = uicolor.white.cgcolor     trianglelayer.anchorpoint = .zero     trianglelayer.position = cgpoint(x: x, y: y)     trianglelayer.name = "triangle"     view.layer.addsublayer(trianglelayer) }  drawtriangle(size: 12, x: view.frame.midx/2, y: view.frame.midy, up: true) drawtriangle(size: 12, x: view.frame.midx, y: view.frame.midy, up: false)

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