如何检测用户在iPhone SDK中绘制矩形，椭圆形或其他几何形状的东西? [英] how to detect user draw rectangle, ellipse or other geometric things in iphone sdk?

问题描述

我的任务是开发像iDesk这样的应用程序.我已经发布了一个问题 在stackoverflow上，我找到了一种识别用户绘制圆的方法检测圆

I have task to develop an application like iDesk. i have already post a question on stackoverflow i have find a way how to recognize user draw a circle detecting circle

现在我要对所有几何形状(例如椭圆形，矩形或其他形状)进行手势.

now i want to gesture all geometric like ellipse,rectangle or others.

我对此一无所知，请帮助我.

i have not any idea about it please help me.

推荐答案

您需要非常熟悉"Core Graphics"绘图框架.

You need to be very familiar with "Core Graphics" framework for drawing .

iOS绘图指南

Quartz 2D编程指南

《核心动画编程指南》

对于形状识别，您需要一些数学大师或一些C库(如果有这样的库)，这确实是一项艰巨的任务.

For shape recognition you need some math master or some C library (if there is such library) , that is really difficult task .

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