IOS UIBezierPath使用方法详解

UIBezier类可以绘制不同类型的图形，它是Core Graphics框架的封装，可以绘制不同的图形,线，多边形，矩形，圆，椭圆，弧形，二次元贝塞尔曲线，三次贝塞尔曲线dengdeng 

它的一个重要方法

1、-(void)stroked   //空心的线的图形

2、-(void)fill   //实心的图形

它的使用方法:

1、创建一个UIBezierPath对象

2、使用方法moveToPoint：去设置起始坐标

3、添加活着Curve去定义一个或者多个subpaths

4、通过调用UIBezier的属性改变形状

代码如下 简陋代码

//
// BezierView.m
// BezierPathDemo
//
// Created by xiaoqiang on 15/9/20.
// Copyright © 2015年 xiaoqiang. All rights reserved.
//

#import "BezierView.h"

@implementation BezierView

//重写
-(void)drawRect:(CGRect)rect{

UIColor *color = [UIColor redColor];
[color set];//设置颜色

UIBezierPath *path = [[UIBezierPath alloc] init];

[path setLineWidth: 5];//设置比的宽度
[path setLineCapStyle:kCGLineCapRound];
[path setLineJoinStyle:kCGLineJoinRound];

//线
[path moveToPoint:CGPointMake(150, 50)];
[path addLineToPoint:CGPointMake(100, 100)];
[path addLineToPoint:CGPointMake(100, 200)];
[path addLineToPoint:CGPointMake(200, 200)];
[path addLineToPoint:CGPointMake(200, 100)];
[path closePath];//不加这句 它不会自动首尾链接
[path stroke];

//创建一个矩形
UIBezierPath *path1 = [UIBezierPath bezierPathWithRect:CGRectMake(50, 220, 50, 100)];
path1.lineWidth = 5;
path1.lineCapStyle = kCGLineCapRound;
path1.lineCapStyle = kCGLineJoinRound;
[path1 stroke];

//创建一个圆
UIBezierPath *path2 = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(200, 220, 100, 100)];
[path2 stroke];

//椭圆
UIBezierPath *path3 = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(50, 350, 100, 50)];
[path3 stroke];

//弧形
UIBezierPath *path4 = [UIBezierPath bezierPathWithArcCenter:CGPointMake(200, 350) radius:50 startAngle:0 endAngle:M_PI * 2 clockwise:YES];
[path4 stroke];

//二次贝塞尔曲线
UIBezierPath *path5 =[UIBezierPath bezierPath];
[path5 moveToPoint:CGPointMake(200, 450)];
[path5 addQuadCurveToPoint:CGPointMake(100, 550) controlPoint:CGPointMake(300, 550)];
[path5 stroke];

//三次贝塞尔曲线
UIBezierPath *path6 =[UIBezierPath bezierPath];
[path6 moveToPoint:CGPointMake(200, 550)];
[path6 addCurveToPoint:CGPointMake(300, 600) controlPoint1:CGPointMake(500, 700) controlPoint2:CGPointMake(100, 750)];
[path6 stroke];

}

-(id)initWithFrame:(CGRect)frame{

self = [super initWi
4000
thFrame:frame];
if (self) {

self.backgroundColor = [UIColor whiteColor];
}
return self;
}

@end