贝塞尔曲线

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-(void)drawRect:(CGRect)rect

{

// [self drawTrianglePath];

// [self drawRectPath];

// [self drawCircle];

[selfdrawCorner];

// [self drawRadian];

// [self drawSecondBezierPath];

// [self drawThirdBezierPath];

}

-(void)drawTrianglePath

{

UIBezierPath *payh = [UIBezierPathbezierPath];

[payh moveToPoint:CGPointMake(10,20)];

[payh addLineToPoint:CGPointMake(300,20)];

[payh addLineToPoint:CGPointMake(150,150)];

[payhclosePath];

//设置线条宽度

payh.lineWidth =2.0;

//填充色必须设置在画笔颜色前边

//设置填充颜色

UIColor *color = [UIColorgreenColor];

[colorset];

[payhfill];

//设置画笔颜色

UIColor *strokeColor = [UIColorblueColor];

[strokeColorset];

[payhstroke];

}

//正方形

-(void)drawRectPath

{

UIBezierPath *path = [UIBezierPathbezierPathWithRect:CGRectMake(10,150, 100, 100)];

path.lineWidth =1.5;

path.lineCapStyle =kCGLineCapRound;

path.lineJoinStyle =kCGLineJoinBevel;

UIColor *color = [UIColorredColor];

[colorset];

[pathfill];

UIColor *strokeColor = [UIColorblueColor];

[strokeColorset];

[pathstroke];

}

//画圆(椭圆)

-(void)drawCircle

{

UIBezierPath *path = [UIBezierPathbezierPathWithOvalInRect:CGRectMake(10,10, 120, 200)];

path.lineWidth =2.0;

UIColor *color = [UIColorblueColor];

[colorset];

[pathfill];

[pathclosePath];

}

//圆角

-(void)drawCorner

{

//矩形的某个角是圆角 CGSizeMake用来指定水平和垂直方向的半径大小

UIBezierPath *path = [UIBezierPathbezierPathWithRoundedRect:CGRectMake(10,20, 100, 100)byRoundingCorners:UIRectCornerTopLeftcornerRadii:CGSizeMake(100,20)];

//矩形四个角都为圆角

UIBezierPath *path1 = [UIBezierPathbezierPathWithRoundedRect:CGRectMake(10,10, 150, 150)cornerRadius:10];

path.lineWidth =1.5;

UIColor *color = [UIColorredColor];

[colorset];

[pathstroke];

[pathclosePath];

}

//画弧

-(void)drawRadian

{

//startAngle(开始的角度)endAngle(结束的角度) clockwise(是否顺时针画弧);

float PI = 3.1415926;

UIBezierPath *path = [UIBezierPathbezierPathWithArcCenter:CGPointMake(150,100) radius:100startAngle:(PI*22)/180endAngle:(PI*180)/180clockwise:NO];

path.lineWidth =1.5;

UIColor *color = [UIColorredColor];

[colorset];

[pathstroke];

[pathclosePath];

}

//二次贝塞尔曲线(起点+控制点(控制点起牵引作用未必一定要经过)+结束点)

-(void)drawSecondBezierPath

{

UIBezierPath *path = [UIBezierPathbezierPath];

//首先设置起始点

[path moveToPoint:CGPointMake(10,10)];

//添加曲线

[path addQuadCurveToPoint:CGPointMake(220,150) controlPoint:CGPointMake(150,10)];

path.lineWidth =1.5;

UIColor *color = [UIColorredColor];

[colorset];

[pathstroke];

[pathclosePath];

}

//三次贝塞尔曲线(道理同上只是多了一个控制点)

-(void)drawThirdBezierPath

{

UIBezierPath *path = [UIBezierPathbezierPath];

[path moveToPoint:CGPointMake(10,150)];

[path addCurveToPoint:CGPointMake(320,150) controlPoint1:CGPointMake(150,20) controlPoint2:CGPointMake(220,230)];

path.lineWidth =1.5;

UIColor *color = [UIColorredColor];

[colorset];

[pathstroke];

[pathclosePath];

}

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