Conversions in objective C

 These are some conversions which an objective C developer often needs while writing code.

NSString to Char * -

NSString *testString = @"Testing"; 

char *testCharP; 

testCharP = (char*)[testString cStringUsingEncoding:NSUTF8StringEncoding];

Char * to NSString -

const char *testCharP = "Testing"; 

NSString *testString;

testString = [NSString stringWithUTF8String:testCharP]; 

NSData to NSString -

NSString* Str = [[NSString alloc] initWithData:tempData
                                         encoding:NSUTF8StringEncoding];

if data is NULL terminated - 

NSString* Str = [NSString stringWithUTF8String:[tempData bytes]];