Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I am doing something similar with a lot more images than 1000. I am storing the url's for the images in core data and then getting an <code>NSArray</code> of all the records where the record attribute <code>imageDownloaded = NO</code>. While downloading the images I set that record's <code>imageDownloaded = YES</code> so if the app needs to restart it can pick up where it left off.</p> <p>Here is a small example of whats happening. I am using Grand Central Dispatch to background this process so I am not blocking the main thread.</p> <pre><code>__block NSArray *records; //...get records dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; for (NSManagedObject *obj in records) { NSString *imageName = [obj valueForKey:@"filename"]; NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@",[obj valueForKey:@"remote_path"],imageName]]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:NULL error:NULL]; [responseData writeToFile:[NSString stringWithFormat:@"%@/%@",documentsDirectory,imageName] atomically:NO]; [obj setValue:[NSNumber numberWithBool:YES] forKey:@"imageDownloaded"]; } }); </code></pre> <p>More Information on Grand Central Dispatch <a href="https://developer.apple.com/library/mac/#documentation/Performance/Reference/GCD_libdispatch_Ref/Reference/reference.html" rel="nofollow">https://developer.apple.com/library/mac/#documentation/Performance/Reference/GCD_libdispatch_Ref/Reference/reference.html</a></p>
    singulars
    1. This table or related slice is empty.
    1. POHow to asynchronously download 1000 images?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USMobileOverlord
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POHow to asynchronously download 1000 images?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COmy query is that i have around 1000 urls in the NSMutableArray .. can u tell me where can i place all the links.. and can u give me the full function i am very thankful because its very hard to me to understand that but really i appreciate your work its very good work and thanks
      singulars
      1. PO
      1. USAppz Venture
    2. COplease helo ne MobileOverlord i am very thankful if your reply my above query in your code reply please because i don't go outsite the apple offical and public library. thanks
      singulars
      1. PO
      1. USAppz Venture
    3. COI can help come up with a more extensive example in a few hours. I'll come back with a more complete function later this evening.
      singulars
      1. PO
      1. USMobileOverlord
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload