/* 创建和使用一个path对象的过程是分开的。创建path是第一步，包含一下步骤： （1）创建一个Bezier path对象。 （2）使用方法moveToPoint:去设置初始线段的起点。 （3）添加line或者curve去定义一个或者多个subpaths。 （4）改变UIBezierPath对象跟绘图相关的属性。 方法moveToPoint:设置我们想要创建形状的起点。从这点开始，我们可以用方法addLineToPoint:去创建一个形状的线段。 */ #import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad { [super viewDidLoad]; //画五角 [self drawPentagon]; //画曲线 [self drawRect:self.view.bounds]; }- (void)drawPentagon{ //(1)UIBezierPath对象 UIBezierPath *aPath = [UIBezierPath bezierPath]; //开始点 [aPath moveToPoint:CGPointMake(100.0, 1.0)]; //划线点 [aPath addLineToPoint:CGPointMake(200.0, 40.0)]; [aPath addLineToPoint:CGPointMake(160, 140)]; [aPath addLineToPoint:CGPointMake(40.0, 140)]; [aPath addLineToPoint:CGPointMake(0.0, 40.0)]; [aPath closePath];//关闭路径（封闭） //设置定点是个5*5的小圆形（自己加的） UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(100-5/2.0, 0, 5, 5)]; [aPath appendPath:path]; //（2）加到CAShapeLayer，效果出来了 //shape：模型 CAShapeLayer *shapelayer = [CAShapeLayer layer]; //设置边框颜色 shapelayer.strokeColor = [[UIColor cyanColor]CGColor]; //设置填充颜色 shapelayer.fillColor = [[UIColor redColor]CGColor]; //***就是这句话在关联彼此（UIBezierPath和CAShapeLayer）： shapelayer.path = aPath.CGPath; [self.view.layer addSublayer:shapelayer]; } //***就是这句话在关联彼此（UIBezierPath和CAShapeLayer）： shapelayer.path = aPath.CGPath; [self.view.layer addSublayer:shapelayer]; } - (void)drawRect:(CGRect)rect{ UIColor *color = [UIColor yellowColor]; [color set]; //设置线条颜色 UIBezierPath* aPath = [UIBezierPath bezierPath]; aPath.lineWidth = 5.0; aPath.lineCapStyle = kCGLineCapRound; //线条拐角 aPath.lineJoinStyle = kCGLineCapRound; //终点处理 [aPath moveToPoint:CGPointMake(20, 50)]; //CurveToPoint:终点 [aPath addCurveToPoint:CGPointMake(200, 50) controlPoint1:CGPointMake(110, 0) controlPoint2:CGPointMake(110, 100) ]; [aPath stroke]; CAShapeLayer *shapelayer = [CAShapeLayer layer]; shapelayer.strokeColor = [[UIColor redColor]CGColor]; shapelayer.fillColor = [[UIColor whiteColor]CGColor]; shapelayer.path = aPath.CGPath; [self.view.layer addSublayer:shapelayer]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.} @end
转载于:https://www.cnblogs.com/ryc--520/articles/5037123.html
