1，不浪费时间，本代码经实践检验通过！

    //网络请求代码段

    //post  request

    NSURL *url=[NSURLURLWithString:@"http://192.168.253.101:8080/ERP/mobile/login.action"];

    NSMutableURLRequest *request =[[NSMutableURLRequestalloc]initWithURL:urlcachePolicy:NSURLRequestUseProtocolCachePolicytimeoutInterval:10];

    //设置请求方式

    [requestsetHTTPMethod:@"POST"];

    //设置参数

    NSString *str=@"username=A023&password=1&master=UAS";

    NSData *data=http://www.mamicode.com/[str>dataUsingEncoding:NSUTF8StringEncoding];

    [requestsetHTTPBody:data];

    //连接服务器

    NSData *received=[NSURLConnectionsendSynchronousRequest:request returningResponse:nilerror:nil];

    NSString *strl=[[NSStringalloc]initWithData:receivedencoding:NSUTF8StringEncoding];

    // NSLog(@"结果：%@",strl); －－－自定义json 格式字符串  包含集合和数组形式  采用原生类库解析的方式

   NSError *error;

    NSString *temstr=@"{\"count\":50,\"allprocess\":[{\"name\":\"神圣天使\"},{\"name\":\"商品天使\"},{\"name\":\"美丽天使\"}]}";

   NSLog(@"temstr=%@",temstr);

    NSData *rdata=http://www.mamicode.com/[temstr>dataUsingEncoding:NSUTF8StringEncoding];

   NSLog(@"rdata=http://www.mamicode.com/%@",rdata);

    NSDictionary *json=[temstrobjectFromJSONStringWithParseOptions:JKParseOptionLooseUnicode];

   NSLog(@"json=%@",json);

   NSArray *elist=[json objectForKey:@"allprocess"];

   NSString *uu=[elist objectAtIndex:1];

   NSString *u_name=[[elist objectAtIndex:1] objectForKey:@"name"];

   NSLog(@"elist=%@",elist);

    NSLog(@"elist=%@",uu);

   NSLog(@"elist=%@",u_name);

   for (int i=0;i<[elistcount];i++) {

        NSLog(@"遍历数组 \n %i=%@",i,[[elistobjectAtIndex:i] objectForKey:@"name"]);

    }

IOS开发专题－－－转化解析JSON格式为字符格式（原生类库解析）