nstimer

说明：  各种格式阅读器，还是非常好用的！！！！！！！！！！！！！！(Reader in various formats, still very nice! ! ! ! ! ! ! ! ! ! ! ! ! !)

类似于Pinterest的瀑布墙图片展示demo，精选ios编程学习源码，很好的参考资料。(Similar to the Pinterest waterfall wall pictures demo, select learning IOS programming source code, a good reference.)

Navigation bar example

右边伸出的bar导航，IOS编程学习源码，很好的参考资料。(Bar navigation right out, learning IOS programming source code, a good reference.)

稀疏表示，使得数据简单看，而且易懂，是流行的一种数据表示方法(Sparse representation，Make the data look simple, but to understand, is one of the popular data representation method)

自定义风格的SegmentedControl，IOS编程学习源码，很好的参考资料。(A custom style SegmentedControl, learning IOS programming source code, a good reference.)

主要用途是对抗多径衰落。由于多径衰落的存在，使得同一个帧由于路径不同，到达用户端的时延有先有后。在相关的频域上的会造成子载波之间的相互干扰，影响 性能。另外，由于有了循环前缀，使得IFFT FFT操作把原来的线性卷积变成循环卷积，大大简化了相应的信号处理复杂度(The main purpose is to fight against multipath fading. Due to the presence of multipath fading, the first after they have the same frame different paths to reach the client delay. Would cause mutual interference between sub-carriers in the frequency domain, affecting performance. In addition, thanks to the cyclic prefix, so IFFT FFT operation to the linear convolution of the original into a circular convolution, greatly simplifying the corresponding signal processing complexity)

一个选择器特效大全的例子：KNMultiItemSelector，IOS编程学习源码，很好的参考资料。(A selector effects Guinness examples: KNMultiItemSelector, learning IOS programming source code, a good reference.)

还是一个uitableview 变化的demo 大家可以参考一下(Uitableview change or a demo we can reference)

FFT蝶形运算,C 语言,可有MATLAB M 语言转换实现(FFT butterfly computation, C language, MATLAB M language can be converted to achieve)