本文主要是介绍[IOS]画线/画圆，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
[IOS]画线/画圆
Demo:http://download.csdn.net/detail/u012881779/8638287
效果：
UIView:
- (void)drawRect:(CGRect)rect {[super drawRect:rect];CGRect frame = CGRectMake(50, 100, 100, 100);/*画填充圆*/CGContextRef context = UIGraphicsGetCurrentContext();[[UIColor whiteColor] set];CGContextFillRect(context, rect);CGContextAddEllipseInRect(context, frame);[[UIColor orangeColor] set];CGContextFillPath(context);/*边框圆*/CGContextSetRGBStrokeColor(context, 255/255.0, 106/255.0, 0/255.0, 1);CGContextSetLineWidth(context, 5);CGContextAddArc(context, 50, 70, 20, 0, 2*M_PI, 0);CGContextDrawPath(context, kCGPathStroke);/*画直线*/CGRect markFrame = CGRectMake(100, 250, 200, 200);[[UIColor orangeColor] set];CGContextSetLineWidth(context, 4);CGPoint points[5];points[0] = CGPointMake(markFrame.origin.x,markFrame.origin.y);points[1] = CGPointMake(markFrame.origin.x+markFrame.size.width/4, markFrame.origin.y+markFrame.size.height/2);points[2] = CGPointMake(markFrame.origin.x+markFrame.size.width/2, markFrame.origin.y+5);points[3] = CGPointMake(markFrame.origin.x+markFrame.size.width/4*3,markFrame.origin.y+markFrame.size.height/2);points[4] = CGPointMake(markFrame.origin.x+markFrame.size.width, markFrame.origin.y);CGContextAddLines(context, points, 5);CGContextDrawPath(context, kCGPathStroke);//边框圆CGContextSetLineWidth(context, 5);CGContextAddArc(context, markFrame.origin.x+markFrame.size.width/2, markFrame.origin.y+markFrame.size.height/2, markFrame.size.height/2-2, 0, 2*M_PI, 0);CGContextDrawPath(context, kCGPathStroke);/*曲线*/[[UIColor redColor] set];CGContextSetLineWidth(context, 4.0);CGContextSetStrokeColorWithColor(context, [UIColor orangeColor].CGColor);CGContextMoveToPoint(context, 300, 370);CGContextAddCurveToPoint(context, 193, 320, 100, 370, 100, 370);CGContextStrokePath(context);
}UIViewController：
#import "DrawViewController.h"@interface DrawViewController ()@end@implementation DrawViewController- (void)viewDidLoad {[super viewDidLoad];/**画虚线圆*/CAShapeLayer *dotteLine = [CAShapeLayer layer];CGMutablePathRef dottePath = CGPathCreateMutable();dotteLine.lineWidth = 2.0f ;dotteLine.strokeColor = [UIColor orangeColor].CGColor;dotteLine.fillColor = [UIColor clearColor].CGColor;CGPathAddEllipseInRect(dottePath, nil, CGRectMake(50.0f, 50.0f, 200.0f, 200.0f));dotteLine.path = dottePath;NSArray *arr = [[NSArray alloc] initWithObjects:[NSNumber numberWithInt:10],[NSNumber numberWithInt:5], nil];dotteLine.lineDashPhase = 1.0;dotteLine.lineDashPattern = arr;CGPathRelease(dottePath);[self.view.layer addSublayer:dotteLine];/**画实线圆*/CAShapeLayer *solidLine = [CAShapeLayer layer];CGMutablePathRef solidPath = CGPathCreateMutable();solidLine.lineWidth = 2.0f ;solidLine.strokeColor = [UIColor orangeColor].CGColor;solidLine.fillColor = [UIColor clearColor].CGColor;CGPathAddEllipseInRect(solidPath, nil, CGRectMake(50.0f, 300.0f, 200.0f, 200.0f));solidLine.path = solidPath;CGPathRelease(solidPath);[self.view.layer addSublayer:solidLine];/**画虚线*/CAShapeLayer *dotteShapeLayer = [CAShapeLayer layer];CGMutablePathRef dotteShapePath = CGPathCreateMutable();[dotteShapeLayer setFillColor:[[UIColor clearColor] CGColor]];[dotteShapeLayer setStrokeColor:[[UIColor orangeColor] CGColor]];dotteShapeLayer.lineWidth = 2.0f ;NSArray *dotteShapeArr = [[NSArray alloc] initWithObjects:[NSNumber numberWithInt:10],[NSNumber numberWithInt:5], nil];[dotteShapeLayer setLineDashPattern:dotteShapeArr];CGPathMoveToPoint(dotteShapePath, NULL, 20,500);CGPathAddLineToPoint(dotteShapePath, NULL, 20, 285);CGPathAddLineToPoint(dotteShapePath, NULL, 300,285);[dotteShapeLayer setPath:dotteShapePath];CGPathRelease(dotteShapePath);[self.view.layer addSublayer:dotteShapeLayer];/**画实线*/CAShapeLayer *solidShapeLayer = [CAShapeLayer layer];CGMutablePathRef solidShapePath = CGPathCreateMutable();[solidShapeLayer setFillColor:[[UIColor clearColor] CGColor]];[solidShapeLayer setStrokeColor:[[UIColor orangeColor] CGColor]];solidShapeLayer.lineWidth = 2.0f ;CGPathMoveToPoint(solidShapePath, NULL, 20, 265);CGPathAddLineToPoint(solidShapePath, NULL, 300,265);CGPathAddLineToPoint(solidShapePath, NULL, 300,50);[solidShapeLayer setPath:solidShapePath];CGPathRelease(solidShapePath);[self.view.layer addSublayer:solidShapeLayer];}
示图：
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