Parse Pagination loadNextPage 2nd Page Loads Twice - ios

Question

In my Parse app, I have Pagination enabled, and for testing purposes, objects per page set to 5. When I run the app I get this in my TableView
1
2
3
4
5
Load More
After clicking Load More the entire table looks like:
1
2
3
4
5
6
7
8
9
10
6
7
8
9
10
Clicking Load More after this will add the set of 11-15 twice. What is going on?
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self) {
// The className to query on
self.parseClassName = #"Prayers";
// Whether the built-in pull-to-refresh is enabled
self.pullToRefreshEnabled = YES;
// Whether the built-in pagination is enabled
self.paginationEnabled = YES;
// The number of objects to show per page
self.objectsPerPage = 5;
}
return self;
}
- (PFQuery *)queryForTable {
PFQuery *query = [PFQuery queryWithClassName:#"Prayers"];
// If no objects are loaded in memory, we look to the cache first to fill the table
// and then subsequently do a query against the network.
if (self.objects.count == 0) {
query.cachePolicy = kPFCachePolicyCacheThenNetwork;
}
[query orderByDescending:#"createdAt"];
return query;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
object:(PFObject *)object
{
static NSString *CellIdentifier = #"Cell";
Cell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[Cell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
self.theObject = object;
BOOL anony = [object[#"Anonymous"] boolValue];
cell.profileName.text = object[#"Title"];
cell.contentLabel.text = object[#"Request"];
cell.firstName = object[#"FirstName"];
cell.lastName = object[#"LastName"];
cell.iostoken = object[#"DeviceID"];
cell.request = object[#"Title"];
cell.prayerObject = object;
PFFile *thumbnail = object[#"ProfilePic"];
cell.profilePic.image = [UIImage imageNamed:#"AppIcon60x60#2x.png"];
/*[cell.commentButton addTarget:self action:#selector(didTapCommentButtonAction:) forControlEvents:UIControlEventTouchUpInside];
[cell.commentButton setTitle:#"Share" forState:UIControlStateNormal];
[cell.commentButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[cell.commentButton setTitleColor:[UIColor greenColor] forState:UIControlStateHighlighted];*/
[thumbnail getDataInBackgroundWithBlock:^(NSData *imageData, NSError *error) {
UIImage *thumbnailImage = [UIImage imageWithData:imageData];
UIImageView *thumbnailImageView = [[UIImageView alloc] initWithImage:thumbnailImage];
cell.profilePic.image = thumbnailImage;
}];
NSString *dates = object[#"dateMade"];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"MMM_dd_yyyy"];
NSDate *datefromstring = [formatter dateFromString:dates];
NSDateFormatter *formatter2 = [[NSDateFormatter alloc] init];
[formatter2 setDateFormat:#"MMM dd, yyyy"];
cell.dateLabel.text = [formatter2 stringFromDate:datefromstring];
UIFont *cellFont = [UIFont fontWithName:#"Verdana-Bold" size:15];
UIFont *cellFont2 = [UIFont fontWithName:#"Verdana-Bold" size:12];
return cell;
}
- (PFObject *)objectAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.row == self.objects.count) {
return nil;
} else {
return [super objectAtIndexPath:[NSIndexPath indexPathForRow:indexPath.row inSection:indexPath.section]];
}
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
PFObject *object = [self objectAtIndexPath:indexPath];
if (object == nil) {
// Return a fixed height for the extra ("Load more") row
return 70;
} else {
NSLog(#"%lu", (unsigned long)[self.objects count]);
PFObject *entry = [self.objects objectAtIndex:indexPath.row];
NSString *commentString = entry[#"Request"];
NSString *nameString = #"";
NSLog(#"%#", commentString);
return [Cell heightForCellWithContentString:(NSString *)commentString] +25 ;
}
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[super tableView:tableView didSelectRowAtIndexPath:indexPath];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
if (indexPath.row == self.objects.count && self.paginationEnabled) {
// Load More Cell
NSLog(#"Load More");
[self loadNextPage];
}

Answer 1

-(PFQuery *)queryForTable {
...
...
...
//Always trigger a network request.
[tableQuery setCachePolicy:kPFCachePolicyNetworkOnly];
//If no objects are loaded in memory, we look to the cache first to fill the table and then subsequently do a query against the network.
if(self.objects.count == 0) {
[tableQuery setCachePolicy: kPFCachePolicyCacheThenNetwork];
}
...
...
...
return tableQuery;
}