ios 如何快速绘制一个简单的圆角矩形（圆角）
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How to draw a simple rounded rect in swift (rounded corners)
提问by mcfly soft
I managed to draw a rect :-) But I don't know how to draw a rounded rect.
我设法画了一个矩形 :-) 但我不知道如何画一个圆形的矩形。
Can someone help me out with the following code how to round the rect?
有人可以用以下代码帮助我如何舍入矩形吗？
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);
回答by Mukesh
//Put this code in ur drawRect
//将此代码放在你的drawRect中
Objective - C
目标-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
斯威夫特 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()
}
回答by Icaro
How to create a rounded corner rectangle using BezierPath
如何使用 BezierPath 创建圆角矩形
var roundRect = UIBezierPath(roundedRect: <CGRect>, byRoundingCorners: <UIRectCorner>, cornerRadii: <CGSize>)
Or for an example with values:
或者以值为例：
var roundRect = UIBezierPath(roundedRect: CGRectMake(0, 0, 100, 100), byRoundingCorners:.AllCorners, cornerRadii: CGSizeMake(16.f, 16.f))
回答by Federico Zanetello
@mukuanswer in Swift 4.x+:
@muku在Swift 4.x+ 中的回答：
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()
}
回答by Trevor
SWIFT 3.x + 4.0I've modified the example for Swift 3 and added few lines to centralise the rectangle in the UIView
SWIFT 3.x + 4.0我修改了 Swift 3 的示例并添加了几行来将矩形集中在 UIView 中
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 on: http://lab.dejaworks.com/uiview-with-rounded-background-designable-in-storyboard/
带屏幕截图的完整代码可在：http: //lab.dejaworks.com/uiview-with-rounded-background-designable-in-storyboard/
回答by Aaron Halvorsen
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()
}
回答by dimpiax
Swift 4
斯威夫特 4
iOS 11
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()
}
