stringByAppendingString与stringWithFormat

stringByAppendingString：字串相加

NSString *string1 =@”1”;

NSString *string2 =[[string1 stringByAppendingString:@”2”]stringByAppendingString:@”3”]

NSlog(@”%@”,string2)
结果是 1+2+3

更加简洁的字串相加 stringWithFormat

NSString *fullname = [NSString stringWithFormat:@”%@ %@”,firstname,lastname];