UITableview Delegate方法在json方法之前调用

Question

In my project I use NSJSONSerialization

dispatch_async(kBgQueue, ^{

    NSData* data = [NSData dataWithContentsOfURL:kLatestKivaLoansURL];

    [self performSelectorOnMainThread:@selector(fetchedData:)
                           withObject:data waitUntilDone:YES];

});

written in viewDidLoad . Then I have implemented fetchedData: .

Problem is that I have used UITableView to display the array data from the JSON a nd before fetchedData: is called the tableview's numberOfRowsInSection: is called.

I write there [myarray count]; so it returns 0, because it calls before fetchdata. Any

Solution ??

Answer 1

You just need to call reloadData on the table view after you have stored the updated data. It's fine that the table view loads before then (though you may want to add a progress indicator to let the user know what's happening).