UIBezierPath ios版简单应用

1、可以用来画遮罩。自定义圆角

+ (instancetype)bezierPathWithRoundedRect:(CGRect)rect byRoundingCorners:(UIRectCorner)corners cornerRadii:(CGSize)cornerRadii;

UIView *view2 = [[UIView alloc] initWithFrame:CGRectMake(120, 10, 80, 80)];

view2.backgroundColor = [UIColor whiteColor];

view2.backgroundColor = [UIColor redColor];

[self.view addSubview:view2];

UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:view2.bounds byRoundingCorners:UIRectCornerBottomLeft cornerRadii:CGSizeMake(0, 100)];

CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];

maskLayer.frame = view2.bounds;

maskLayer.path = maskPath.CGPath;

view2.layer.mask = maskLayer;

2、绘制图形

（1）、drawRect方面里面直接构建路径然后    [aPath stroke]

-(void)drawRect:(CGRect)rect{

UIColor *color = [UIColor redColor];

[color set];  //设置线条颜色

UIColor *fillColor = [UIColor greenColor];

[fillColor setFill];

UIBezierPath* aPath = [UIBezierPath bezierPath];

aPath.lineWidth = 5.0;

aPath.lineCapStyle = kCGLineCapRound;  //线条拐角

aPath.lineJoinStyle = kCGLineCapRound;  //终点处理

// Set the starting point of the shape.

[aPath moveToPoint:CGPointMake(100.0, 0.0)];

// Draw the lines

[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]; //第五条线通过调用closePath方法得到的

[aPath fill];

[aPath stroke]; //Draws line 根据坐标点连线

}

（2）、添加在view的layer层

UIBezierPath* aPath = [UIBezierPath bezierPath];

aPath.lineWidth = 5.0;

aPath.lineCapStyle = kCGLineCapRound;  //线条拐角

aPath.lineJoinStyle = kCGLineCapRound;  //终点处理

// Set the starting point of the shape.

[aPath moveToPoint:CGPointMake(100.0, 0.0)];

// Draw the lines

[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.lineWidth = 2;

[aPath closePath]; //第五条线通过调用closePath方法得到的

[aPath fill];

[aPath stroke]; //Draws line 根据坐标点连线

CAShapeLayer *layer = [[CAShapeLayer alloc]init];

layer.path = aPath.CGPath;

layer.fillColor = [UIColor greenColor].CGColor;

layer.strokeColor = [UIColor redColor].CGColor;

[self.view.layer addSublayer:layer];

3、原生方法绘制图形

//创建一个椭圆的贝塞尔曲线 半径相等 就是圆了

UIBezierPath *mPath1 = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(60, 60, 10, 10)];

[mPath1 fill];

//创建一个矩形的贝塞尔线

UIBezierPath *mPath2 = [UIBezierPath bezierPathWithRect:CGRectMake(70,70, 10, 10)];

[mPath2 stroke];

//创建一个圆弧 传的弧度

UIBezierPath *mPath3 = [UIBezierPath bezierPathWithArcCenter:CGPointMake(50, 100)

radius:10

startAngle:DEGREES_TO_RADIANS(0)

endAngle:DEGREES_TO_RADIANS(180)

clockwise:YES];

[mPath3 fill];

//创建一个 矩形的贝塞尔曲线, 带圆角

UIBezierPath *mPath4 = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(250, 15, 20, 20) cornerRadius:3];

[mPath4 fill];

//定义一个矩形 边角会变成 设置的角度  方位/角度大小

UIBezierPath *mPath5 =[UIBezierPath bezierPathWithRoundedRect:CGRectMake(250, 45, 40, 40)

byRoundingCorners:UIRectCornerTopLeft

cornerRadii:CGSizeMake(10, 10)];

[mPath5 fill];

//定义一个二级的赛贝尔曲线 重点|拐弯点

UIBezierPath *mPath6 = [UIBezierPath bezierPath];

[mPath6 moveToPoint:CGPointMake(10,260)];

[mPath6 addQuadCurveToPoint:CGPointMake(200,260) controlPoint:CGPointMake(85, 240)];

[mPath6 setLineWidth:3];

[mPath6 stroke];

//定义一个三级的赛贝尔曲线 终点|拐点1|拐点2

UIBezierPath *mPath7 = [UIBezierPath bezierPath];

[mPath7 moveToPoint:CGPointMake(10,290)];

[mPath7 addCurveToPoint:CGPointMake(300, 290)

controlPoint1:CGPointMake(50, 270)

controlPoint2:CGPointMake(140, 340)];

[mPath7 stroke];