IOS Base64 Encryption decryption

• 
  This article reprinted to http://jingyan.baidu.com/article/93f9803fff45c9e0e46f5596.html

• Download the Gtmbase64.zip library package from the resources address and unzip it to get gtmbase64.h,gtmbase64.m and GTMDefines.h three files.

• The extracted three files are added to the project.

• Create a new class of Base64, in the Base64.h Zhongtian four functions:

  + (nsstring*) encodebase64string: (nsstring*) input;

  + (nsstring*) decodebase64string: (nsstring*) input;

  + (nsstring*) Encodebase64data: (nsdata*) data;

  + (nsstring*) Decodebase64data: (nsdata*) data;

  In the base64.m file, implement the above 4 functions:

  + (nsstring*) encodebase64string: (nsstring*) Input {

  Nsdata*data = [InputdataUsingEncoding:NSUTF8StringEncodingallowLossyConversion:YES];

  data = [Gtmbase64encodedata:data];

  nsstring*base64string = [[nsstringalloc]initwithdata:dataencoding:nsutf8stringencoding];

  returnbase64string;

  }

  + (nsstring*) decodebase64string: (nsstring*) Input {

  Nsdata*data = [InputdataUsingEncoding:NSUTF8StringEncodingallowLossyConversion:YES];

  data = [Gtmbase64decodedata:data];

  nsstring*base64string = [[nsstringalloc]initwithdata:dataencoding:nsutf8stringencoding];

  returnbase64string;

  }

  + (nsstring*) Encodebase64data: (nsdata*) Data {

  data = [Gtmbase64encodedata:data];

  nsstring*base64string = [[nsstringalloc]initwithdata:dataencoding:nsutf8stringencoding];

  returnbase64string;

  }

  + (nsstring*) Decodebase64data: (nsdata*) Data {

  data = [Gtmbase64decodedata:data];

  nsstring*base64string = [[nsstringalloc]initwithdata:dataencoding:nsutf8stringencoding];

  returnbase64string;

  }

• Direct call + (nsstring*) encodebase64string: (nsstring*) input and

  + (nsstring*) decodebase64string: (nsstring*) input can be added and decrypted.

• You can download the demo from the resources address.