挖一挖贝塞尔曲线那些事 原

//构造方法
+ (instancetype)bezierPath;
//使用矩形进行构造
+ (instancetype)bezierPathWithRect:(CGRect)rect;
//使用圆角矩形进行构造
+ (instancetype)bezierPathWithOvalInRect:(CGRect)rect;
//创建圆角矩形贝塞尔路径 并设置圆角半径
+ (instancetype)bezierPathWithRoundedRect:(CGRect)rect cornerRadius:(CGFloat)cornerRadius; 
+ (instancetype)bezierPathWithRoundedRect:(CGRect)rect byRoundingCorners:(UIRectCorner)corners cornerRadii:(CGSize)cornerRadii;
//使用圆弧创建
+ (instancetype)bezierPathWithArcCenter:(CGPoint)center radius:(CGFloat)radius startAngle:(CGFloat)startAngle endAngle:(CGFloat)endAngle clockwise:(BOOL)clockwise;
//使用CGPath创建
+ (instancetype)bezierPathWithCGPath:(CGPathRef)CGPath;

//CGPath对象
@property(nonatomic) CGPathRef CGPath;

//将路径移动到某个点
- (void)moveToPoint:(CGPoint)point;
//添加一天线
- (void)addLineToPoint:(CGPoint)point;
//添加一个二阶贝塞尔曲线段
- (void)addCurveToPoint:(CGPoint)endPoint controlPoint1:(CGPoint)controlPoint1 controlPoint2:(CGPoint)controlPoint2;
//添加一个三阶贝塞尔曲线段
- (void)addQuadCurveToPoint:(CGPoint)endPoint controlPoint:(CGPoint)controlPoint;
//添加圆弧
- (void)addArcWithCenter:(CGPoint)center radius:(CGFloat)radius startAngle:(CGFloat)startAngle endAngle:(CGFloat)endAngle clockwise:(BOOL)clockwise;
//关闭路径
- (void)closePath;
//移除所有点
- (void)removeAllPoints;
//添加一段路径
- (void)appendPath:(UIBezierPath *)bezierPath;
//对路径进行逆向
- (UIBezierPath *)bezierPathByReversingPath;
//进行transform变换
- (void)applyTransform:(CGAffineTransform)transform;
//路径是否为空
@property(readonly,getter=isEmpty) BOOL empty;
//尺寸
@property(nonatomic,readonly) CGRect bounds;
//当前点
@property(nonatomic,readonly) CGPoint currentPoint;
//判断是否包含某个点
- (BOOL)containsPoint:(CGPoint)point;

//设置线宽
@property(nonatomic) CGFloat lineWidth;
//设置线帽风格
@property(nonatomic) CGLineCap lineCapStyle;
//设置折点风格
@property(nonatomic) CGLineJoin lineJoinStyle;
@property(nonatomic) CGFloat miterLimit;
@property(nonatomic) CGFloat flatness;
//奇偶规则
@property(nonatomic) BOOL usesEvenOddFillRule;
//进行虚线设置
- (void)setLineDash:(nullable const CGFloat *)pattern count:(NSInteger)count phase:(CGFloat)phase;
- (void)getLineDash:(nullable CGFloat *)pattern count:(nullable NSInteger *)count phase:(nullable CGFloat *)phase;
//进行填充绘制
- (void)fill;
//进行路径绘制
- (void)stroke;