NSString *word = [[NSString alloc] init];
word = [[tfNewWord text] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
좌우 공백을 제거해준다.
TAG trim
NSString *word = [[NSString alloc] init];
word = [[tfNewWord text] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];