James (MrGeckosMedia.com), joined by, Eduardo (MegaEduX.com), and Nick, explains libraries and frameworks.

11:56

Example code from episode.

Libraries

Libraries included, /usr/lib/libcrypto.dylib and /usr/lib/libssl.dylib

#import

#import

int main (int argc, const char * argv[]) {

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

NSString *string = @"Hello";

OpenSSL_add_all_algorithms();

unsigned char outbuf[EVP_MAX_MD_SIZE];

unsigned int templen, inlen = [string length];

const char *input = [string UTF8String];

EVP_MD_CTX ctx;

const EVP_MD *digest = EVP_md5();

if(!digest) {

NSLog(@"cannot get digest with name MD5");

return 1;

}

EVP_MD_CTX_init(&ctx);

EVP_DigestInit(&ctx,digest);

if(!EVP_DigestUpdate(&ctx,input,inlen)) {

NSLog(@"EVP_DigestUpdate() failed!");

EVP_MD_CTX_cleanup(&ctx);

return 1;

}

if (!EVP_DigestFinal(&ctx, outbuf, &templen)) {

NSLog(@"EVP_DigesttFinal() failed!");

EVP_MD_CTX_cleanup(&ctx);

return 1;

}

EVP_MD_CTX_cleanup(&ctx);

NSMutableString *md5 = [NSMutableString string];

for (int i=0; iFrameworks

Frameworks included, AddressBook.framework

#import

#import

int main (int argc, const char * argv[]) {

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

ABAddressBook *addressBook = [ABAddressBook sharedAddressBook];

NSArray *people = [addressBook people];

for (int i=0; i<[people count]; i++) {

ABPerson *person = [people objectAtIndex:i];

NSString *firstName = [person valueForProperty:kABFirstNameProperty];

NSString *lastName = [person valueForProperty:kABLastNameProperty];

NSString *name = nil;

if (firstName!=nil) {

name = firstName;

if (lastName!=nil)

name = [name stringByAppendingFormat:@" %@", lastName];

}

if (name!=nil)

NSLog(@"Person named: %@", name);

}

[pool drain];

return 0;

}

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