如何在目标C中将图像从主viewController设置为tableView单元格？

Question

I ma doing program in WebService... In main viewController....

AppListTableViewController *appList = [self.storyboard instantiateViewControllerWithIdentifier:@"ALTVC"];

self.dataTask = [self.urlSession dataTaskWithRequest:self.urlRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {

     NSMutableDictionary *serverRes = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];

     NSString *imageLink = [[[[[[serverRes objectForKey:@"feed"] objectForKey:@"entry"] objectAtIndex:0] objectForKey:@"im:image"] objectAtIndex:0] objectForKey:@"label"];

     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
     [defaults setObject:imageLink forKey:@"image"];

     [self.dataTask resume];
}

    [self.navigationController pushViewController:appList animated:YES];

From server image link came successfully... but how to send and display that image in tableView cell.

In tableView controller ....

cell.imageView.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[defaults objectForKey:@"image"]]]]; 

It's not display any image in cell...

Answer 1

the reason you were pushed your VC before completion on call, do like

self.dataTask = [self.urlSession dataTaskWithRequest:self.urlRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)     {

     NSMutableDictionary *serverRes = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];

     NSString *imageLink = [[[[[[serverRes objectForKey:@"feed"] objectForKey:@"entry"] objectAtIndex:0] objectForKey:@"im:image"] objectAtIndex:0] objectForKey:@"label"];

   if (imageLink)
    {
      NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
     [defaults setObject:imageLink forKey:@"image"];
        // call your navigation inside the block
        AppListTableViewController *appList = [self.storyboard instantiateViewControllerWithIdentifier:@"ALTVC"];
       [self.navigationController pushViewController:appList animated:YES];
    }


    }];

     [self.dataTask resume];