Question

- (void)viewDidLoad
{
    [super viewDidLoad];


    NSURL *url=[NSURL URLWithString:@"http://api.geonames.org/citiesJSON?north=44.1&south=-9.9&east=-22.4&west=55.2&lang=de&username=demo"];
    NSURLRequest *request=[[NSURLRequest alloc]initWithURL:url];
    [[NSURLConnection alloc]initWithRequest:request delegate:self];

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{

    _data=[[NSMutableData alloc]init];
}

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)thedata{

    [_data appendData:thedata];



-(void)connectionDidFinshLoading:(NSURLConnection *)connection{

    _name=[NSJSONSerialization JSONObjectWithData:_data options:NSJSONReadingMutableContainers error:nil];
        [self.tableView reloadData];

Answer 1

{＆＃34; GEONAMES＆＃34;：[{＆＃34; LNG＆＃34;： - 99.12766456604，＆＃34; geonameId＆＃34;：3530597，＆＃34; COUNTRYCODE＆＃34;：＆＃34; MX＆＃34 ;, ＆＃34;名称＆＃34;：＆＃34; Mexiko-施塔特＆＃34 ;, ＆＃34; fclName＆＃34;：＆＃34; city，village，...＆＃34;，＆＃34; toponymName＆＃34;：＆＃34;墨西哥城＆＃34;，＆＃34; fcodeName＆＃34;：＆＃34;政治实体的资本＆＃34;，＆＃34;维基＆＃34;：＆＃34; en.wikipedia.org/wiki/Mexico_City" ;, ＆＃34; LAT＆＃34;：19.428472427036，＆＃34; FCL＆＃34;：＆＃34; P＆＃34 ;, ＆＃34;人口＆＃34;：12294193，＆＃34; FCODE＆＃34;：＆＃34; PPLC＆＃34; }， {＆＃34; LNG＆＃34;：116.397228240967，＆＃34; geonameId＆＃34;：1816670，＆＃34; COUNTRYCODE＆＃34;：＆＃34; CN＆＃34 ;, ＆＃34;名称＆＃34;：＆＃34;北京＆＃34 ;, ＆＃34; fclName＆＃34;：＆＃34; city，village，...＆＃34;，＆＃34; toponymName＆＃34;：＆＃34;北京＆＃34 ;, ＆＃34; fcodeName＆＃34;：＆＃34;政治实体的资本＆＃34;，＆＃34;维基＆＃34;：＆＃34; en.wikipedia.org/wiki/Beijing" ;, ＆＃34; LAT＆＃34;：39.9074977414405，＆＃34; FCL＆＃34;：＆＃34; P＆＃34;＆＃34;人口＆＃34;：11716620，＆＃34; FCODE＆＃34;：＆＃34; PPLC＆＃34; }]}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return [self.name count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

UITableViewCell *cell = 
                [tableView dequeueReusableCellWithIdentifier:@"Cell"
                            forIndexPath:indexPath];

  // Configure the cell...
    cell.textLabel.text=[[self.nameobjectAtIndex:indexPath.row]objectForKey:@"geonameId"];

    return cell;
}

它没有显示任何错误消息.....它正在运行......并显示空表视图.....

Json数据未在tableview中加载

1 个答案: