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SendAsynchronousRequest with reloadData delay table when drawing

I am trying to use the new sendAsynchronousRequest added in iOS5. I have a model class (File) with a method that requests some data from the server, and then passes this data to the controller class (FilesController) that created the model object.

The model class has a method with the following code:

[NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
    NSArray *decodedResponse = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
    NSArray *files = [self _dictionariesToFiles:decodedResponse];
    handler(files);
}];

The controller class uses it as follows:

[File findAll:conditions completionHandler:^(NSArray *files) {
    dataSource = files;

    NSLog(@"set");

    [self.tableView reloadData];

    NSLog(@"reload");

    activityIndicator.hidden = TRUE;
}];

In the console, I can immediately see how NSLogs displays the “set” and “reload” messages, but the table and indicator do not change until a few seconds have passed (5-10 seconds).

Does anyone know where the problem is?

Thank.

PD: I changed the async request to compatible synchronized, and then the problem went away, but you want to use the async request for this.

:

NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSArray *decodedResponse = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:nil];
NSArray *files = [self _dictionariesToFiles:decodedResponse];
handler(files);
+5
2

[tableView reloadData] . . . :

dispatch_async(dispatch_get_main_queue(), ^{
    [self.tableView reloadData];
    activityIndicator.hidden = TRUE;
});

EDIT: ​​

+16

: [[NSOperationQueue alloc] init], [NSOperationQueue mainQueue] . ,

+3

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