iOS 如何使用UIBezierPath创建简单的形状
示例
对于一个简单的圈子：
UIBezierPath* ovalPath = [UIBezierPath bezierPathWithOvalInRect: CGRectMake(0,0,50,50)]; [UIColor.grayColor setFill]; [ovalPath fill];
迅速：
let ovalPath = UIBezierPath(ovalInRect: CGRect(x: 0, y: 0, width: 50, height: 50)) UIColor.grayColor().setFill() ovalPath.fill()
对于一个简单的矩形：
UIBezierPath* rectanglePath = [UIBezierPath bezierPathWithRect: CGRectMake(0,0,50,50)]; [UIColor.grayColor setFill]; [rectanglePath fill];
迅速：
let rectanglePath = UIBezierPath(rect: CGRect(x: 0, y: 0, width: 50, height: 50)) UIColor.grayColor().setFill() rectanglePath.fill()
对于简单的一行：
UIBezierPath* bezierPath = [UIBezierPath bezierPath]; [bezierPath moveToPoint: CGPointMake(x1,y1)]; [bezierPath addLineToPoint: CGPointMake(x2,y2)]; [UIColor.blackColor setStroke]; bezierPath.lineWidth = 1; [bezierPath stroke];
迅速：
let bezierPath = UIBezierPath() bezierPath.moveToPoint(CGPoint(x: x1, y: y1)) bezierPath.addLineToPoint(CGPoint(x: x2, y: y2)) UIColor.blackColor().setStroke() bezierPath.lineWidth = 1 bezierPath.stroke()
半圈：
CGRect ovalRect = CGRectMake(x,y,width,height); UIBezierPath* ovalPath = [UIBezierPath bezierPath]; [ovalPath addArcWithCenter: CGPointMake(0, 0) radius: CGRectGetWidth(ovalRect) / 2 startAngle: 180 * M_PI/180 endAngle: 0 * M_PI/180 clockwise: YES]; [ovalPath addLineToPoint: CGPointMake(0, 0)]; [ovalPath closePath]; CGAffineTransform ovalTransform = CGAffineTransformMakeTranslation(CGRectGetMidX(ovalRect), CGRectGetMidY(ovalRect)); ovalTransform = CGAffineTransformScale(ovalTransform, 1, CGRectGetHeight(ovalRect) / CGRectGetWidth(ovalRect)); [ovalPath applyTransform: ovalTransform]; [UIColor.grayColor setFill]; [ovalPath fill];
迅速：
let ovalRect = CGRect(x: 0, y: 0, width: 50, height: 50) let ovalPath = UIBezierPath() ovalPath.addArcWithCenter(CGPoint.zero, radius:ovalRect.width/ 2, startAngle: 180 * CGFloat(M_PI)/180, endAngle: 0 * CGFloat(M_PI)/180, clockwise: true) ovalPath.addLineToPoint(CGPoint.zero) ovalPath.closePath() var ovalTransform = CGAffineTransformMakeTranslation(CGRectGetMidX(ovalRect), CGRectGetMidY(ovalRect)) ovalTransform = CGAffineTransformScale(ovalTransform, 1,ovalRect.height/ ovalRect.width) ovalPath.applyTransform(ovalTransform) UIColor.grayColor().setFill() ovalPath.fill()
对于一个简单的三角形：
UIBezierPath* polygonPath = [UIBezierPath bezierPath]; [polygonPath moveToPoint: CGPointMake(x1, y1)]; [polygonPath addLineToPoint: CGPointMake(x2, y2)]; [polygonPath addLineToPoint: CGPointMake(x3, y2)]; [polygonPath closePath]; [UIColor.grayColor setFill]; [polygonPath fill];
迅速：
let polygonPath = UIBezierPath() polygonPath.moveToPoint(CGPoint(x: x1, y: y1)) polygonPath.addLineToPoint(CGPoint(x: x2, y: y2)) polygonPath.addLineToPoint(CGPoint(x: x3, y: y3)) polygonPath.closePath() UIColor.grayColor().setFill() polygonPath.fill()