Parse.com: Searching a TableView - ios

Question

Hey together I am using Parse SDK for my App - the interface is build in Storyboard...
I am having a table view which get's his data from Parse, now I want to make it searchable.
I found this post and followed it but not came to a running result! :/
The search results are load but I having problems to display them...
I get the following errors:
... myApp[..] *** Assertion failure in -[UISearchResultsTableView _configureCellForDisplay:forIndexPath:], /SourceCache/UIKit_Sim/UIKit-2380.17/UITableView.m:5471
... myApp[...] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView dataSource must return a cell from tableView:cellForRowAtIndexPath:'
I tried a lot around but don't come to a result, here is my code - can anybody help:
Sorry for my bad english! ;)
#import "FirstLaunchViewController.h"
#interface FirstLaunchViewController ()
#end
#implementation FirstLaunchViewController
#pragma mark - UIViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self loadObjects];
[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:#"navbar_background.png"] forBarMetrics:UIBarMetricsDefault];
self.searchResults = [NSMutableArray array];
}
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithClassName:#"teams"];
self = [super initWithCoder:aDecoder];
if (self) {
// The className to query on
self.parseClassName = #"teams";
self.textKey = #"verein";
// The key of the PFObject to display in the label of the default cell style
// self.keyToDisplay = #"text";
// Whether the built-in pull-to-refresh is enabled
self.pullToRefreshEnabled = NO;
// Whether the built-in pagination is enabled
self.paginationEnabled = YES;
self.loadingViewEnabled = NO;
// The number of objects to show per page
self.objectsPerPage = 50;
}
return self;
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait || UIInterfaceOrientationIsLandscape(interfaceOrientation));
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object {
PFTableViewCell *cell = (PFTableViewCell *)[tableView dequeueReusableCellWithIdentifier:#"Cell"];
// Configure the cell
UIColor *color = [[UIColor alloc] initWithRed:0.0 green:0.0 blue:0.0 alpha:0.0];
cell.detailTextLabel.backgroundColor = color;
cell.textLabel.backgroundColor = color;
cell.backgroundView = [ [UIImageView alloc] initWithImage:[ [UIImage imageNamed:#"cellbackground_n.png"] stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0]];
cell.selectedBackgroundView = [ [UIImageView alloc] initWithImage:[ [UIImage imageNamed:#"cellbackground_down_n.png"] stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0]];
cell.accessoryView = [[ UIImageView alloc ] initWithImage:[UIImage imageNamed:#"cellarrows.png" ]];
if (tableView == self.tableView) {
cell.textLabel.text = [object objectForKey:#"verein"];
} else {
PFUser *obj2 = [self.searchResults objectAtIndex:indexPath.row];
PFQuery *query = [PFQuery queryWithClassName:#"teams"];
PFObject *searchedUser = [query getObjectWithId:obj2.objectId];
NSString *content = [searchedUser objectForKey:#"verein"];
cell.textLabel.text = content;
NSLog(#"Content: %#", content);
}
return cell;
}
-(void)filterResults:(NSString *)searchTerm {
[self.searchResults removeAllObjects];
PFQuery *query = [PFQuery queryWithClassName: self.parseClassName];
[query whereKeyExists:#"verein"]; //this is based on whatever query you are trying to accomplish
[query whereKey:#"verein" containsString:searchTerm];
NSArray *results = [query findObjects];
NSLog(#"%#", results);
NSLog(#"%u", results.count);
[self.searchResults addObjectsFromArray:results];
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
[self filterResults:searchString];
return YES;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (tableView == self.tableView) {
return self.objects.count;
} else {
return self.searchResults.count;
}
}
#end

Answer 1

The issue is that your tableView initially has no reusable cells to dequeue. You need to check whether the cell returned by dequeueReusableCellWithIdentifier: is nil, and create a cell if it is.
PFTableViewCell *cell = (PFTableViewCell *)[tableView dequeueReusableCellWithIdentifier:#"Cell"];
if (!cell)
{
cell = [[PFTableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:#"Cell"];
}
// Configure the cell
...
This way, you are guaranteeing that cell has a value, so you can avoid returning nil from this method.
To handle tableView:didSelectRowAtIndexPath: correctly, you'll need to first check which tableView triggered the event, and handle it accordingly. Below is an example of how this could work - you'd need to substitute your own detail view controller.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView == self.tableView) {
[super tableView:tableView didSelectRowAtIndexPath:indexPath];
}
else {
PFUser *user = PFUser *obj2 = [self.searchResults objectAtIndex:indexPath.row];
MyDetailViewController *detailController = [[MyDetailViewController alloc] initWithObject:user];
[self.navigationController pushViewController:datailController animated:YES];
}
}