Ios 由于未捕获异常而终止应用程序'；NSInvalidArgumentException 4

我是ios新手。我正在制作第一个应用程序，在其中我从服务器调用数据并显示在表视图单元格中，但它给出了一个提到的异常。数据正确，但当我填充表格视图时，会显示单元格异常。下面是我的代码

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
        static NSString *tableviewidentifier = @"cell";
        UITableViewCell *cell= [tableView dequeueReusableCellWithIdentifier:tableviewidentifier];
        if(cell==nil){
            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:tableviewidentifier];
        }
        NSMutableArray *jsonresultarr=[NSMutableArray new];

        NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://magmasysdev.com/ddc/getAllCompanies.php"]];  // this is your request url

        [request setHTTPMethod:@"GET"];

        [request setValue:@"application/json;charset=UTF-8" forHTTPHeaderField:@"content-type"];

        NSError *err;
        NSURLResponse *response;
        NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];

        NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:responseData options: NSJSONReadingMutableContainers error: &err];     // here parsing the array

        NSArray *firstArry=[[jsonArray objectAtIndex:1]objectForKey:@"company_data"];

        for (int i=0; i<[firstArry count]; i++)
        {
            NSMutableDictionary *getjsonresponse= [firstArry objectAtIndex:i];

            NSString *Company_Id=[getjsonresponse objectForKey:@"Company_Id"];
            NSString *Company_Name=[getjsonresponse objectForKey:@"Company_Name"];
            NSString *Company_Address=[getjsonresponse objectForKey:@"Company_Address"];
            NSString *Company_Email=[getjsonresponse objectForKey:@"Company_Email"];
            NSString *Company_Tel_Num=[getjsonresponse objectForKey:@"Company_Tel_Num"];
            NSString *Company_Website=[getjsonresponse objectForKey:@"Company_Website"];
            NSString *Company_Fax_Num=[getjsonresponse objectForKey:@"Company_Fax_Num"];
            [jsonresultarr addObject:Company_Id];
            [jsonresultarr addObject:Company_Name];
            [jsonresultarr addObject:Company_Address];
            [jsonresultarr addObject:Company_Email];
            [jsonresultarr addObject:Company_Tel_Num];
            [jsonresultarr addObject:Company_Website];
            [jsonresultarr addObject:Company_Fax_Num];
            cell.textLabel.text=[[jsonresultarr objectAtIndex:indexPath.row]objectForKey:@"Company_Id"]; // getting exception in this line..

        }




            return cell;
    }

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    // Return the number of rows in the section.
    NSMutableArray *jsonresultarr=[NSMutableArray new];

    NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://magmasysdev.com/ddc/getAllCompanies.php"]];  // this is your request url

    [request setHTTPMethod:@"GET"];

    [request setValue:@"application/json;charset=UTF-8" forHTTPHeaderField:@"content-type"];

    NSError *err;
    NSURLResponse *response;
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];

    NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:responseData options: NSJSONReadingMutableContainers error: &err];     // here parsing the array

    NSArray *firstArry=[[jsonArray objectAtIndex:1]objectForKey:@"company_data"];

    for (int i=0; i<[firstArry count]; i++)
    {
        NSMutableDictionary *getjsonresponse= [firstArry objectAtIndex:i];

        NSString *Company_Id=[getjsonresponse objectForKey:@"Company_Id"];
        NSString *Company_Name=[getjsonresponse objectForKey:@"Company_Name"];
        NSString *Company_Address=[getjsonresponse objectForKey:@"Company_Address"];
        NSString *Company_Email=[getjsonresponse objectForKey:@"Company_Email"];
        NSString *Company_Tel_Num=[getjsonresponse objectForKey:@"Company_Tel_Num"];
        NSString *Company_Website=[getjsonresponse objectForKey:@"Company_Website"];
        NSString *Company_Fax_Num=[getjsonresponse objectForKey:@"Company_Fax_Num"];
        [jsonresultarr addObject:Company_Id];
        [jsonresultarr addObject:Company_Name];
        [jsonresultarr addObject:Company_Address];
        [jsonresultarr addObject:Company_Email];
        [jsonresultarr addObject:Company_Tel_Num];
        [jsonresultarr addObject:Company_Website];
        [jsonresultarr addObject:Company_Fax_Num];



}
    return jsonresultarr.count;
}

-（UITableViewCell*）tableView:（UITableView*）tableView cellForRowAtIndexPath:（NSIndexPath*）indexPath{
静态NSString*tableviewidentifier=@“单元格”；
UITableViewCell*单元格=[tableView dequeueReusableCellWithIdentifier:tableviewidentifier]；
如果（单元格==nil）{
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault重用标识符：tableviewidentifier]；
}
NSMUTABLEARRY*JSONResultar=[NSMUTABLEARRY new]；
NSMutableURLRequest*请求=[NSMutableUrlRequestRequestWithURL:[NSURL URLWithString:@]http://magmasysdev.com/ddc/getAllCompanies.php“]]；//这是您的请求url
[请求设置HttpMethod:@“获取”]；
[request setValue:@“application/json；charset=UTF-8”forHTTPHeaderField:@“content type”]；
n错误*错误；
NSURLResponse*响应；
NSData*responseData=[NSURLConnection sendSynchronousRequest:request ReturnInResponse:&响应错误：&错误]；
NSArray*jsonArray=[NSJSONSerialization JSONObjectWithData:responseData选项：NSJSONReadingMutableContainers错误：&err]；//此处解析数组
NSArray*firstArry=[[jsonArray objectAtIndex:1]objectForKey:@“公司数据”]；
对于（inti=0；i您所遵循的方法不是一个好方法。对于每个单元，它调用web服务以影响性能

 cell.textLabel.text=[[jsonresultarr objectAtIndex:indexPath.row]objectForKey:@"Company_Id"];

这里的
jsonresultar
包含了NSString的对象，而不是NSDictionary，因此更改为如下所示

cell.textLabel.text=[jsonresultarr objectAtIndex:indexPath.row]; 

现在出现此错误的原因是“NSRangeException:”***-[\uu NSArrayM objectAtIndex:]：索引7超出范围[0..6]请正确地为代理提供数据源，最好请阅读UITableView.huf的基础知识，请不要这样做，将其作为Web服务的单独函数，并使用实例变量来保存结果值OK。很好。实际上，在我检查时，但我现在可以更改：）如何在单元格中为indexpath处的行调用该函数？？