替换字符串不起作用

Question

我需要在"id ="之后添加字符串@"d"

示例=

url = @"id=63488320543140151742289377"

需要是

url = @"id=d63488320543140151742289377"

我试过这个:

NSRange range = [url rangeOfString:@"id="];
[url stringByReplacingCharactersInRange:range withString:@"id=d"];

但不行

Answer 1

url = [url stringByReplacingOccurrencesOfString:@"id=" withString:@"id=d"];