How to draw a simple rounded rectangle in fast (rounded corners)

Question

I managed to draw a rectangle :-) But I do not know how to draw a rounded rectangle.

Can someone help me with the following code how to round a rectangle?

let canvas = UIGraphicsGetCurrentContext() rec = CGRectMake(0, 0, 40, 40); //var maskPath = UIBezierPath(roundedRect: rec, byRoundingCorners: .BottomLeft | .BottomRight, cornerRadii: CGSize(width: 3, height: 3)) CGContextAddRect(canvas, rec); CGContextFillPath(canvas); 

Answer 1

// Put this code in ur drawRect

Goal - C

  - (void)drawRect:(CGRect)rect { CGContextRef ctx = UIGraphicsGetCurrentContext(); CGContextSaveGState(ctx); CGPathRef clippath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(x,y, width, height) cornerRadius:6].CGPath; CGContextAddPath(ctx, clippath); CGContextSetFillColorWithColor(ctx, self.color.CGColor); CGContextClosePath(ctx); CGContextFillPath(ctx); [self.color set]; [_path closePath]; // Implicitly does a line between p4 and p1 [_path fill]; // If you want it filled, or... [_path stroke]; // ...if you want to draw the outline. CGContextRestoreGState(ctx); } 

Swift 3

 func drawRect(rect : CGRect) { // Size of rounded rectangle let rectWidth = rect.width let rectHeight = rect.height // Find center of actual frame to set rectangle in middle let xf:CGFloat = (self.frame.width - rectWidth) / 2 let yf:CGFloat = (self.frame.height - rectHeight) / 2 let ctx: CGContext = UIGraphicsGetCurrentContext()! ctx.saveGState() let rect = CGRect(x: xf, y: yf, width: rectWidth, height: rectHeight) let clipPath: CGPath = UIBezierPath(roundedRect: rect, cornerRadius: rectCornerRadius).cgPath ctx.addPath(clipPath) ctx.setFillColor(rectBgColor.cgColor) ctx.closePath() ctx.fillPath() ctx.restoreGState() } 

Answer 2

How to create a rounded corner rectangle using BezierPath

  var roundRect = UIBezierPath(roundedRect: <CGRect>, byRoundingCorners: <UIRectCorner>, cornerRadii: <CGSize>) 

Or for an example with values:

 var roundRect = UIBezierPath(roundedRect: CGRectMake(0, 0, 100, 100), byRoundingCorners:.AllCorners, cornerRadii: CGSizeMake(16.f, 16.f)) 

Answer 3

@muku answer in Swift 4.x + :

 override func draw(_ rect: CGRect) { super.draw(rect) let clipPath = UIBezierPath(roundedRect: rect, cornerRadius: 6.0).cgPath let ctx = UIGraphicsGetCurrentContext()! ctx.addPath(clipPath) ctx.setFillColor(UIColor.red.cgColor) ctx.closePath() ctx.fillPath() } 

Answer 4

SWIFT 3.x + 4.0 I changed the example for Swift 3 and added some lines to centralize the rectangle in UIView

 func roundRect() { // Size of rounded rectangle let rectWidth:CGFloat = 100 let rectHeight:CGFloat = 80 // Find center of actual frame to set rectangle in middle let xf:CGFloat = (self.frame.width - rectWidth) / 2 let yf:CGFloat = (self.frame.height - rectHeight) / 2 let ctx: CGContext = UIGraphicsGetCurrentContext()! ctx.saveGState() let rect = CGRect(x: xf, y: yf, width: rectWidth, height: rectHeight) let clipPath: CGPath = UIBezierPath(roundedRect: rect, cornerRadius: rectCornerRadius).cgPath ctx.addPath(clipPath) ctx.setFillColor(rectBgColor.cgColor) ctx.closePath() ctx.fillPath() ctx.restoreGState() } 

Full code with screenshots is available at: http://lab.dejaworks.com/uiview-with-rounded-background-designable-in-storyboard/

Answer 5

 override func draw(_ rect: CGRect) { let bezierPath = UIBezierPath(roundedRect: CGRect(x: 0, y: 0, width: 40.0, height: 40.0), cornerRadius: 3.0) UIColor.yellow.setFill() bezierPath.fill() } 

Answer 6

Swift 4

iOS 11

 override func draw(_ rect: CGRect) { super.draw(rect) let context = UIGraphicsGetCurrentContext()! context.saveGState() defer { context.restoreGState() } let path = UIBezierPath(roundedRect: rect, byRoundingCorners: [.topLeft, .topRight], cornerRadii: CGSize(width: 4, height: 4)) context.addPath(path.cgPath) context.closePath() context.setStrokeColor(UIColor.red.cgColor) context.strokePath() }