typedef enum : NSUInteger {
    ZHFigureDrawingTypeGraffiti = 1,        //涂鸦
    ZHFigureDrawingTypeArrow,               //单箭头
    ZHFigureDrawingTypeLine,                //直线
    ZHFigureDrawingTypeDottedline,          //虚线
    ZHFigureDrawingTypeRulerArrow,          //双箭头直线
    ZHFigureDrawingTypeRulerLine,           //双杠直线
    ZHFigureDrawingTypeOval,                //椭圆
    ZHFigureDrawingTypeCircle,              //圆形
    ZHFigureDrawingTypeRect,                //矩形
    ZHFigureDrawingTypeTriangle,            //三角形
    ZHFigureDrawingTypeArc,                 //圆弧
    ZHFigureDrawingTypeCosine,              //正余弦
    ZHFigureDrawingTypeTrapezoid,           //梯形
    ZHFigureDrawingTypeRhombus,             //菱形
    ZHFigureDrawingTypePentagon,            //五边形
    ZHFigureDrawingTypeHexagon,             //六边形
    ZHFigureDrawingTypeAxis,                //坐标系
    ZHFigureDrawingTypeRighTangle,          //直角坐标系
    ZHFigureDrawingTypeThreeDCoordinate,    //三维坐标系
    ZHFigureDrawingTypeSphere,              //球体
    ZHFigureDrawingTypeTriangularPyramid,   //三菱锥
    ZHFigureDrawingTypeCone,                //圆锥
    ZHFigureDrawingTypeCylinder,            //圆柱
    ZHFigureDrawingTypeCuboid,              //立方体
} ZHFigureDrawingType;

/**
 初始化
 @param startPoint      开始点
 @param type            图形类型
 */
+ (instancetype)createLayerWithStartPoint:(CGPoint)startPoint type:(ZHFigureDrawingType)type;

@property (nonatomic, assign) ZHFigureDrawingType drawingType;     //图形类型
@property (nonatomic, strong) NSMutableArray *pointArray;    //记录图形绘制点
@property (nonatomic, assign) CGPoint startPoint;            //起始坐标
@property (nonatomic, assign) CGPoint endPoint;              //终点坐标
@property (nonatomic, strong) UIColor *lineColor;            //画笔颜色
@property (nonatomic, assign) CGSize paintSize;              //画布大小

- (void)movePathWithStartPoint:(CGPoint)startPoint;
- (void)movePathWithEndPoint:(CGPoint)endPoint;

- (UIBezierPath *)createArrowWithStartPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint;
- (CGFloat)distanceBetweenStartPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint;
- (CGFloat)angleWithFirstPoint:(CGPoint)firstPoint andSecondPoint:(CGPoint)secondPoint;
- (CGFloat)angleEndWithFirstPoint:(CGPoint)firstPoint andSecondPoint:(CGPoint)secondPoint;