获取当前硬件可用内存的例子UIDevice，精选ios编程学习源码，很好的参考资料。-Gets the current hardware available memory for example UIDevice, select learning IOS programming source code, a good reference.

iOS 上运行的录音demo code ，便于学习如何在ios上使用相关的音频硬件-running on iOS recording demo code, easy to learn how to use audio hardware on ios