Question

我有来自http://vmg.hdvietpro.com/ztv/home的JSON数据。我想在单击getData按钮后获取text1，thumbnailImage（NSString）值从JSON到表视图后，在此JSON中获取text1，thumbnailImage值。这是我的代码，单击按钮后没有任何反应。谢谢你的帮助。

@interface ViewController ()
{
    NSMutableData *webData;
    NSURLConnection *connection;
    NSMutableArray *moviesArray;

}
@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [[self myTableView]setDelegate:self];
     [[self myTableView]setDataSource:self];
    moviesArray=[[NSMutableArray alloc]init];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
    [webData setLength:0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
    [webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
    NSLog(@"Fail");
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
    NSDictionary *allDataDictionary=[NSJSONSerialization JSONObjectWithData:webData options:0 error:nil];
    NSDictionary *response=[allDataDictionary objectForKey:@"response"];
    NSDictionary *hotProgram=[response objectForKey:@"hot_program"];
                                 NSArray *itemPageHot=[hotProgram objectForKey:@"page"];
    for (NSDictionary*dic  in itemPageHot) {
        NSString *text1=[dic objectForKey:@"text1"];
        [moviesArray addObject:text1];


    }
    [[self myTableView]reloadData];
}
- (IBAction)getData:(id)sender {
    NSURL *url=[NSURL URLWithString:@"http://vmg.hdvietpro.com/ztv/home"];
    NSURLRequest *request=[NSURLRequest requestWithURL:url];
    connection = [NSURLConnection connectionWithRequest:request delegate:self];
    if(connection){
        webData =[[NSMutableData alloc]init];
        NSLog(@"ket noi thanh cong");
    }
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return [moviesArray count];
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString*CellIndentifier=@"Cell";
    UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:CellIndentifier];

    if(!cell){
        cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIndentifier];
    }
    cell.textLabel.text=[moviesArray objectAtIndex:indexPath.row];
    return cell;
}

Answer 1

您没有正确遍历字典。密钥page是密钥itemPage的子项，因此这应该可以正常工作

NSArray *itemPageHot = [[hotProgram objectForKey:@"itemPage"] objectForKey:@"page"];

我建议您下载JSON检查程序以解决此类问题。应用程序商店中的VisualJSON就是我使用的。

从JSON获取数据到表视图

1 个答案: