Persistencia de datos con Parse
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The document discusses several methods for creating, saving, deleting, and viewing objects stored on Parse, as well as creating relationships between objects. It provides code examples for saving a new object with the save and saveInBackground methods, deleting an object with delete and deleteInBackground, and creating a one-to-many relationship between a Group and Person objects by adding each to the other's relation. The document also briefly mentions Parse login, signup, and query table view controller classes, and loading remote images from Parse files.
![Creando y guardando
objetos
#pragma mark PTGroupDataSourceProtocol
-(void) addGroup:(NSString *)group
{
PFObject *newGroup = [PFObject objectWithClassName:@"Group"];
[newGroup setObject:group forKey:@"name"];
[newGroup saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if(succeeded)
{
dispatch_async(dispatch_get_main_queue(), ^{
[self getGroupsAndReloadDataInBackground];
});
}
}];
NSLog(@"Saving group %@", group);
}
Doc](https://image.slidesharecdn.com/persistencia-121223052255-phpapp01/85/Persistencia-de-datos-con-Parse-2-320.jpg)
![Borrando objetos
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
PFObject *group = [groups objectAtIndex:indexPath.row];
[group deleteInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if(succeeded & !error)
{
NSMutableArray *newGroups = [groups mutableCopy];
[newGroups removeObjectAtIndex:indexPath.row];
groups = [newGroups copy];
dispatch_async(dispatch_get_main_queue(), ^{
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
});
}
}];
}
}](https://image.slidesharecdn.com/persistencia-121223052255-phpapp01/85/Persistencia-de-datos-con-Parse-4-320.jpg)
![Relaciones
- (void) addPerson:(NSDictionary *)data
{
PFObject *group = [data objectForKey:@"group"];
PFObject *person = [PFObject objectWithClassName:@"Person"];
[person setObject:[data objectForKey:@"firstName"] forKey:@"firstName"];
[person setObject:[data objectForKey:@"lastName"] forKey:@"lastName"];
[person setObject:[data objectForKey:@"email"] forKey:@"email"];
[person setObject:[data objectForKey:@"twitter"] forKey:@"twitter"];
PFRelation *memberOf = [person relationforKey:@"memberOf"];
[memberOf addObject:group];
[person saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if(succeeded)
{
dispatch_async(dispatch_get_main_queue(), ^{
[self loadDataInBackground];
});
//We cannot create the inverse relation until the object is saved
PFRelation *relation = [group relationforKey:@"members"];
[relation addObject:person];
[group saveInBackground];
}
else
{
NSLog(@"Person could not be saved.");
Doc
}
}]; API](https://image.slidesharecdn.com/persistencia-121223052255-phpapp01/85/Persistencia-de-datos-con-Parse-8-320.jpg)
![PFImage
PFImageView *imageView = [[PFImageView alloc] init];
imageView.image = [UIImage imageNamed:@"..."]; // placeholder image
imageView.file = (PFFile *)[someObject objectForKey:@"picture"]; // remote image
[imageView loadInBackground];
Doc](https://image.slidesharecdn.com/persistencia-121223052255-phpapp01/85/Persistencia-de-datos-con-Parse-15-320.jpg)
Persistencia de datos con Parse
- 1. Persistencia de datos con Parse aalbagarcia@gmail.com @aalbagarcia
- 2. Creando y guardando objetos #pragma mark PTGroupDataSourceProtocol -(void) addGroup:(NSString *)group { PFObject *newGroup = [PFObject objectWithClassName:@"Group"]; [newGroup setObject:group forKey:@"name"]; [newGroup saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { if(succeeded) { dispatch_async(dispatch_get_main_queue(), ^{ [self getGroupsAndReloadDataInBackground]; }); } }]; NSLog(@"Saving group %@", group); } Doc
- 3. Creando y guardando objetos ¨C save ¨C save: ¨C saveInBackground ¨C saveInBackgroundWithBlock: ¨C saveInBackgroundWithTarget:selector: ¨C saveEventually ¨C saveEventually: Doc
- 4. Borrando objetos - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { PFObject *group = [groups objectAtIndex:indexPath.row]; [group deleteInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { if(succeeded & !error) { NSMutableArray *newGroups = [groups mutableCopy]; [newGroups removeObjectAtIndex:indexPath.row]; groups = [newGroups copy]; dispatch_async(dispatch_get_main_queue(), ^{ [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; }); } }]; } }
- 5. Creando y guardando de objetos ¨C delete ¨C delete: ¨C deleteInBackground ¨C deleteInBackgroundWithBlock: ¨C deleteInBackgroundWithTarget:selector: ¨C deleteEventually
- 8. Relaciones - (void) addPerson:(NSDictionary *)data { PFObject *group = [data objectForKey:@"group"]; PFObject *person = [PFObject objectWithClassName:@"Person"]; [person setObject:[data objectForKey:@"firstName"] forKey:@"firstName"]; [person setObject:[data objectForKey:@"lastName"] forKey:@"lastName"]; [person setObject:[data objectForKey:@"email"] forKey:@"email"]; [person setObject:[data objectForKey:@"twitter"] forKey:@"twitter"]; PFRelation *memberOf = [person relationforKey:@"memberOf"]; [memberOf addObject:group]; [person saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) { if(succeeded) { dispatch_async(dispatch_get_main_queue(), ^{ [self loadDataInBackground]; }); //We cannot create the inverse relation until the object is saved PFRelation *relation = [group relationforKey:@"members"]; [relation addObject:person]; [group saveInBackground]; } else { NSLog(@"Person could not be saved."); Doc } }]; API
- 10. Relaciones Doc API
- 11. La demo es muy artesanal ?Qu¨¦ herramientas nos da parse?
- 12. PFLoginViewController Doc
- 13. PGSignUpViewController Doc
- 14. PFQueryTableViewController Doc
- 15. PFImage PFImageView *imageView = [[PFImageView alloc] init]; imageView.image = [UIImage imageNamed:@"..."]; // placeholder image imageView.file = (PFFile *)[someObject objectForKey:@"picture"]; // remote image [imageView loadInBackground]; Doc
Editor's Notes
- #11: Comentar en la documentaci¨®n c¨®mo se borran los registros