如何在iOS的表格視圖中檢索json數據

Question

我不知道如何從這個JSON數據中檢索特定的數據並在tableview中插入。

{ 
"error": "ok", 
"data": [{ 
    "facebook_id": "1068644546541665", 
    "user_id": "95590e92-6c74-44d1-9e5c-5a10c6341ba3", 
    "name": "Sunil", 
    "trackingallowed": 1, 
    "trackingpermission": 1 
}, { 
    "facebook_id": "10311905002886663", 
    "user_id": "95ab5fc0-9c6d-4e3e-9cb2-bfa4d53e640f", 
    "name": "Saravanan", 
    "trackingallowed": 1, 
    "trackingpermission": 1 
}, { 
    "facebook_id": "998936463528828", 
    "user_id": "cd6e3c89-bc2d-45a9-8436-9603e1b4724b", 
    "name": "Suresh", 
    "trackingallowed": 1, 
    "trackingpermission": 1 
}] 

}

獲取通過列表數組中的值。

-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data 
{ 
[friendsconnection_data appendData:data]; 
    NSError *localerror; 
    NSDictionary *parsedobject =[NSJSONSerialization JSONObjectWithData:data options:0 error:&localerror]; 
    NSLog(@"parsedobject1 %@",parsedobject); 
    ListArray = [parsedobject valueForKey:@"data"]; 

    NSLog(@"rrresults1 %lu",(unsigned long)ListArray.count); 
    NSLog(@"results1 %@",ListArray); 
} 

我得到EXC_BAD_ACCESS。我需要知道如何從JSON獲取特定數據。例如我只想得到facebookid和name。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    [self FriendsData]; 
    static NSString *TableIdentifier =@"tableitem"; 
    UITableViewCell *cell =[tableView dequeueReusableCellWithIdentifier:TableIdentifier]; 
    if(cell == nil) 
    { 
     cell =[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:TableIdentifier]; 
    } 
    cell.textLabel.text = [[ListArray objectAtIndex:indexPath.row]objectForKey:@"name"]; 
    tableView.rowHeight = 300; 

    return cell; 
} 

Answer 1

請使用此代碼。我認爲它幫你

NSError *json_parse_error; 
NSDictionary *responseDictionary=[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&json_parse_error]; 
NSArray *user_info_array=[responseDictionary valueForKey:@"data"]; 

在表視圖委託

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    static NSString *TableIdentifier=@"tableitem";; 
    cell=[tableView dequeueReusableCellWithIdentifier:TableIdentifier]; 

    if (cell==nil) { 
     cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:TableIdentifier]; 
    } 

    cell.textLabel.text = [[user_info_array objectAtIndex:indexPath.row] objectForKey:@"name"]; 

    cell.detailTextLabel.text = [[user_info_array objectAtIndex:indexPath.row] objectForKey:@"facebook_id"]; 

    return cell; 
} 

//設置表格視圖單元格

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    return 300.0; 
}