问题
Has anyone used reCaptcha on their iPhone application? I am trying to figure out how to embed it in my App...
回答1:
The only way to use reCaptcha in an iPhone app is by rendering a WebView within the app. There is a nice alternative to reCaptcha called kaptcha that actually has a usable api. http://code.google.com/p/kaptcha/
回答2:
use this http://iphonesdksnippets.com/post/2009/05/05/Add-text-to-image-%28UIImage%29.aspx find a nice background image for you app, and just randomly generate some number and/or text. not exactly a captcha, but it can work out. Hope it helps!
来源：https://stackoverflow.com/questions/2447470/recaptcha-on-iphone-app-using-sdk