Question

surnameField.text = "Fal à èà ò l'opo";    

// remove space and apostrophe
NSString *surnarmeInput = [[surnameField.text stringByReplacingOccurrencesOfString:@" " withString:@""] stringByReplacingOccurrencesOfString:@"'" withString:@""];

I would remove also accents.

Result “Falaeaolopo”

Answer 1

// convert to a data object, using a lossy conversion to ASCII
NSData *asciiEncoded = [yourOriginalString dataUsingEncoding:NSASCIIStringEncoding
                         allowLossyConversion:YES];

// take the data object and recreate a string using the lossy conversion
NSString *other = [[NSString alloc] initWithData:asciiEncoded
                                        encoding:NSASCIIStringEncoding];
// relinquish ownership
[other autorelease];

which will remove all the accents..To remove all spaces

NSString *yourFinalString = [other stringByReplacingOccurrencesOfString:@" " withString:@""];

First part of removing accent, code copied from dreamlax’s answer in this thread..