贝塞尔曲线 UIBezierPath

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#import "BezierPathView.h"

#define kDegreesToRadians(degrees) ((pi * degrees) / 180)

@implementation BezierPathView

- (void)drawRect:(CGRect)rect {

// 画三角形

[selfdrawTrianglePath];

// 画矩形

[selfdrawRectPath];

// 画圆

[selfdrawCiclePath];

// 画带圆角的矩形

[selfdrawRoundedRectPath];

// 画弧

[selfdrawARCPath];

// 画二次贝塞尔曲线

[selfdrawSecondBezierPath];

// 画三次贝塞尔曲线

[selfdrawThirdBezierPath];

}

- (void)drawTrianglePath

{

UIBezierPath *path = [UIBezierPathbezierPath];

[path moveToPoint:CGPointMake(20,20)];

[path addLineToPoint:CGPointMake(60,20)];

[path addLineToPoint:CGPointMake(40,40)];

[path closePath];

// 设置线宽

path.lineWidth =1.5;

// 设置填充颜色

UIColor *fillColor = [UIColorgreenColor];

[fillColor set];

[path fill];

// 设置画笔颜色

UIColor *strokeColor = [UIColorblueColor];

[strokeColor set];

// 根据我们设置的各个点连线

[path stroke];

}

- (void)drawRectPath

{

UIBezierPath *path = [UIBezierPathbezierPathWithRect:CGRectMake(100,20, 100, 50)];

path.lineWidth =1.5;

kCGLineCapButt, // 默认

kCGLineCapRound, // 轻微圆角

kCGLineCapSquare // 正方形

path.lineCapStyle =kCGLineCapRound;

kCGLineJoinMiter, // 默认表示斜接

kCGLineJoinRound, // 圆滑衔接

kCGLineJoinBevel // 斜角连接

path.lineJoinStyle =kCGLineJoinBevel;

// 设置填充颜色

UIColor *fillColor = [UIColorgreenColor];

[fillColor set];

[path fill];

// 设置画笔颜色

UIColor *strokeColor = [UIColorblueColor];

[strokeColor set];

// 根据我们设置的各个点连接

[path stroke];

}

- (void)drawCiclePath

{

// 传的是正方形就可以画圆了(长方形--椭圆)

UIBezierPath *path = [UIBezierPathbezierPathWithOvalInRect:CGRectMake(230,20, 100, 100)];

// 设置填充颜色

UIColor *fillColor = [UIColorgreenColor];

[fillColor set];

[path fill];

// 设置画笔颜色

UIColor *strokeColor = [UIColorblueColor];

[strokeColor set];

// 根据我们设置的各个点连接

[path stroke];

}

- (void)drawRoundedRectPath

{

// 矩形的所有角都变成圆角

// UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(20, 130, 100, 50) cornerRadius:10];

// 指定矩形的某个角为圆角

UIBezierPath *path = [UIBezierPathbezierPathWithRoundedRect:CGRectMake(20,130, 100, 50)byRoundingCorners:UIRectCornerBottomRightcornerRadii:CGSizeMake(15,15)];

// 设置填充颜色

UIColor *fillColor = [UIColorgreenColor];

[fillColor set];

[path fill];

// 设置画笔颜色

UIColor *strokeColor = [UIColorblueColor];

[strokeColor set];

// 根据我们设置的各个点连线

[path stroke];

}

// 画弧

- (void)drawARCPath

{

constCGFloat pi =3.14159265359;

CGPoint center =CGPointMake(230,230);

UIBezierPath *path = [UIBezierPathbezierPathWithArcCenter:centerradius:100startAngle:0endAngle:kDegreesToRadians(145)clockwise:YES];

// 有什么区别？

path.lineCapStyle =kCGLineCapRound;

path.lineJoinStyle =kCGLineJoinRound;

path.lineWidth =5.0;

UIColor *strokeColor = [UIColorredColor];

[strokeColor set];

[path stroke];

}

// 画二次贝塞尔曲线

- (void)drawSecondBezierPath

{

UIBezierPath *path = [UIBezierPathbezierPath];

// 首先设置一个起点

[path moveToPoint:CGPointMake(20,230)];

// 添加二次曲线(设置终端点和控制点)

[path addQuadCurveToPoint:CGPointMake(120,350) controlPoint:CGPointMake(self.frame.size.width / 2, 120)];

path.lineCapStyle =kCGLineCapRound;

path.lineJoinStyle =kCGLineJoinRound;

path.lineWidth =5.0;

UIColor *strokeColor = [UIColorredColor];

[strokeColor set];

[path stroke];

}

// 画三次贝塞尔曲线

- (void)drawThirdBezierPath

{

UIBezierPath *path = [UIBezierPathbezierPath];

// 设置起始端点

[path moveToPoint:CGPointMake(20,150)];

// 设置终止端点和控制点1、控制点2

[path addCurveToPoint:CGPointMake(300,150) controlPoint1:CGPointMake(160,0) controlPoint2:CGPointMake(160,250)];

path.lineCapStyle =kCGLineCapRound;

path.lineJoinStyle =kCGLineJoinRound;

path.lineWidth =5.0;

UIColor *strokeColor = [UIColorredColor];

[strokeColor set];

[path stroke];

}

@end

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