UIBezierPath 贝尔曲线

画实线

@implementation UIView (Drawing)-(CAShapeLayer *)drawLineFromPoint:(CGPoint)p1 toPoint:(CGPoint)p2 width:(CGFloat)width color:(UIColor *)color{    UIBezierPath *path = [UIBezierPath bezierPath];    [path moveToPoint:p1];    [path addLineToPoint:p2];        CAShapeLayer *layer = [CAShapeLayer layer];    layer.lineWidth = width;    layer.strokeColor = color.CGColor;    layer.path = path.CGPath;        [self.layer addSublayer:layer];        return layer;}

画虚线

- (CAShapeLayer*)dashLineFromPoint:(CGPoint)p1 toPoint:(CGPoint)p2 realLinePoint:(CGFloat)realLinePoint dashLinePoint:(CGFloat)dashLinePoint color:(UIColor*)color lineWidth:(CGFloat)lineWidth{    //realLinePoint 单位实线长度  dashLinePoint 单位间隙长度    CAShapeLayer *layer = [self drawLineFromPoint:p1 toPoint:p2 width:lineWidth color:color];    layer.lineDashPattern = @[[NSNumber numberWithInteger:realLinePoint],[NSNumber numberWithInteger:dashLinePoint]];    return layer;    }