These two days I begin to do new project, its name is Wallet. And it is not a seperate project, is a part of Mobile Guard. On this project I work with a colleagues, he is incharge of service interface invoke and debug, and I am incharge of other interface function. The same as usual, I write iOS interface not use xib or storyboard, define interface only use pure code. For the wallet's security level is very high, so I should strong check all of words which user input. I am very familar with regular because I use it before to development website.