nstimer

二维码扫描应用demo，精选ios编程学习源码，很好的参考资料。(Two dimensional bar code scanning application demo, select learning IOS programming source code, a good reference.)

评分打星星的一个例子 可以用来参考 很实用(An example of playing star ratings can be used to refer to)

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.)

use that for adjustament in matriz for espectrus

TabBarCustom (所有TabBar之间切换)，精选ios编程学习源码，很好的参考资料。(TabBarCustom (switching between all TabBar), selection of learning IOS programming source code, a good reference.)

FOR HELP AND DOCUMENT FOR POWER FCD C

Animate a bear using sprites, using cocos 2D

tab bar controller 自定义颜色和演示demo，精选ios编程学习源码，很好的参考资料。(Tab bar controller custom colors and demonstration of demo, selection of learning IOS programming source code, a good reference.)

Outputs the inputted numbers in increasing order

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)