1、相关简介

　　1.1、

　　1.2、

 

2、绘制曲线

　　2.1、方法详解

- (void)addQuadCurveToPoint:(CGPoint)endPoint controlPoint:(CGPoint)controlPoint;

　　追加一条二次贝塞尔曲线，结束点是endPoint，曲线偏向controlPoint控制点！　　

 

　　2.2、绘制曲线

//绘制曲线- (void)drawView{    UIBezierPath *path = [UIBezierPath bezierPath];    DrawModel *firstModel = [self.dataArr firstObject];    CGPoint firstPoint = firstModel.currPoint;    [path moveToPoint:firstPoint];    if (self.dataArr.count<2) {        return;    }    for (int i=1; i
     
       secondPoint.y)                controlPoint.y -= diffY;        return controlPoint;}//获取两点之间中心点- (CGPoint)getMindPointWithFirstPoint:(CGPoint)firstPoint                          secondPoint:(CGPoint)secondPoint{    return CGPointMake((firstPoint.x + secondPoint.x)/2, (firstPoint.y + secondPoint.y)/2);}
     

效果图

 

3、绘制折线

- (void)drawView{    UIBezierPath *path = [UIBezierPath bezierPath];    DrawModel *firstModel = [self.dataArr firstObject];    CGPoint firstPoint = firstModel.currPoint;    [path moveToPoint:firstPoint];    if (self.dataArr.count<2) {        return;    }    for (int i=1; i

效果图