是否有iOS等效的appendBezierPathWithArcWithCenter [英] Is there an iOS equivalent of appendBezierPathWithArcWithCenter

问题描述

我正试图在iOS中画一个四分之一圈。在Mac OS中，似乎你可以使用appendBezierPathWithArcWithCenter但这似乎在iOS中不起作用。

有没有人知道如何在iOS中绘制一个四分之一圈？ / p>

谢谢

解决方案

有两个iOS等价物，一个用于 UIBezierPath 和一个 CGPath ：

UIBezierPath 等价物

  UIBezierPath * path = [UIBezierPath bezierPath]; 
 [路径addArcWithCenter：centerPoint 
半径：radius 
 startAngle：startAngle 
 endAngle：endAngle 
顺时针：是]; 
  

CGPath 等价物

  CGMutablePathRef path = CGPathCreateMutable（）; 
 CGPathAddArc（path，NULL，
 centerPoint.x，centerPoint.y，
 radius，
 startAngle，
 endAngle，
 NO）; //顺时针
  

I'm trying to draw a quarter circle in iOS. In Mac OS, it seems you can use appendBezierPathWithArcWithCenter but this doesn't seem to work in iOS.

Does anyone know how to simply draw a quarter circle in iOS?

Thanks

解决方案

There are two iOS equivalents, one for UIBezierPath and one for CGPath:

UIBezierPath equivalent

UIBezierPath *path = [UIBezierPath bezierPath];
[path addArcWithCenter:centerPoint
                radius:radius
            startAngle:startAngle
              endAngle:endAngle
             clockwise:YES];

CGPath equivalent

CGMutablePathRef path = CGPathCreateMutable();
CGPathAddArc(path, NULL,
             centerPoint.x, centerPoint.y,
             radius,   
             startAngle,  
             endAngle,   
             NO); // clockwise

这篇关于是否有iOS等效的appendBezierPathWithArcWithCenter的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！