Swift development Tutorial--How to encrypt a string MD5

in the SWIFT project to build a random objective-c class, you will be prompted to generate a Bridging-header, click Yes, and then delete the Objective-c class just created, leaving only [project name]-bridging-header.h file.
in the [project name]-bridging-header.h file write:
#import <CommonCrypto/CommonDigest.h>

Then write a function that generates MD5:

class func md5string (str:string),string{

var cStr = (strasnsstring). utf8string

var buffer =unsafemutablepointer<UInt8 . Alloc (+)

cc_md5(cStr, (cc_long) (strlen(CSTR)), buffer)

var md5string:nsmutablestring =nsmutablestring( );

for var i = 0; i < ; ++i{

md5string. AppendFormat ("%x2", buffer)

}

free(buffer)

returnString(md5string);

}

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Swift development Tutorial--How to encrypt a string MD5