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

    NSMutableURLRequest *request =[[NSMutableURLRequest alloc]initWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:10];

    //设置请求方式

    [request setHTTPMethod:@"POST"];

    //设置参数

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

    NSData *data=[str dataUsingEncoding:NSUTF8StringEncoding];

    [request setHTTPBody:data];

    //连接服务器

    NSData *received=[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

    NSString *strl=[[NSString alloc]initWithData:received encoding: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=[temstr dataUsingEncoding:NSUTF8StringEncoding];

    NSLog(@"rdata=%@",rdata);

    NSDictionary *json=[temstr objectFromJSONStringWithParseOptions: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<[elist count];i++) {

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

    }