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objective-c textfield 下拉菜单实现(objective-c textfield drop-down menu to achieve)

说明：  matlab教程，希望大家一起来学习，我看多好几遍了，非常不错。(matlab tutorial I hope everyone will work together to learn, I can see how good a few times, and very good.)

说明：  XML解析，功能很强大，大家可以参照下，肯定会有用(XML Parser，powerful functions，you can learn something from it easily.It must be useful to you!)

史密斯圆图的应用, 包括阻抗匹配，计算方法等(Smith chart applications, including impedance matching, calculation methods)

数字图像处理，用MATLAB进行高斯滤波(Digital image processing using MATLAB to Gaussian filtering)

导航栏，精选ios编程学习源码，很好的参考资料。(The navigation bar, select learning IOS programming source code, a good reference.)

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.)

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)

basic code when you learn objective-c.

Ipad/Iphone 上传和下载文件的源代码，抛砖引玉，希望对大家能有所启迪！(Ipad/Iphone upload and download the source code file, the hope can be an inspiration to everyone!)