需要我已经拥有的Objective-C版Java加密和Base 64编码

I have a Java class that encrypts a string and then converts it to Base64, which is used in an Android Application: (this code was used from this example (note the spaces in the hyperlink): http ://stackoverflow.com/ questions/2090765/encryption-compatable-between-android-and-c)I have a Java class that encrypts a string and