utf-8 解密加密

// 之前的在使用会报警告 urlStr是请求路径

NSString *decodeStr = [urlStr stringByRemovingPercentEncoding];//utf-8解码

    NSString *encodeStr = [decodeStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet characterSetWithCharactersInString:@"`#%^{}\"[]|\\<> "].invertedSet];