如何访问iPhone的常规辅助功能设置

我需要访问iPhone的常规辅助功能设置;我需要知道用户是否已启用说出自动文本或黑白等功能并以编程方式响应。我不需要更改值，只读它们。此外，如果有一种方法可以定义（对于我的应用程序）忽略它们（并以编程方式设置相应的支持） - 那将是一个很好的解决方案。

I need to access the iPhone's general accessibility settings; I need to know whether the user has turn on features such as "Speak Auto-text" or "White on Black" and respond to that programatically. I don't need to change the values, only read them. Also, if there's a way of defining (for my app) to ignore them (and set the corresponding support programatically) - that would be a good solution.

有什么建议吗？