在iOS应用中捕获签名 [英] Capturing signatures in an iOS app

问题描述

我们需要从iOS应用程序捕获签名，用例是让用户直接用手指在屏幕上绘制签名。我更多是一个网络家伙，所以我的默认方法是嵌入一个网络视图，并使用画布让用户绘制，然后捕获一个PNG与 toDataURL 。一个本地的Cocoa控件可能会更好。有没有任何预建的解决方案，或者一个简单的API使用？我注意到iOS上的汉字输入可以让你在手机上绘制字符：这个API可以使用还是私有？

We have a need to capture signatures from an iOS app – the use case is letting the user draw their signature with their finger directly onto the screen. I’m more of a web guy so my default approach would be to embed a web view and use canvas to let the user draw, then capturing a PNG with toDataURL. A native Cocoa control would probably be nicer though. Are there any pre-built solutions out there, or an easy API to use? I note that the kanji input on iOS lets you draw characters on your phone: is this API available for use or is it private?

推荐答案

p>你可以使用Core Graphics。这是教程。

You can do that using Core Graphics. Here is a tutorial.

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