Parse UITableView with Search - ios

Question

I'm following this AppCoda tutorial on implementing Search; however, I'm pulling titles for the table view from Parse and can't get the search function to work. Throws an exception when I start typing in the search:
'Can't use in/contains operator with collection {
buildingLat = "42.726366";
buildingLong = "-84.480642";
buildingTitle = "International Center";
} (not a collection)'
Here's the code for my table view controller:
#import "BuildingsViewController.h"
#import <Parse/Parse.h>
#interface BuildingsViewController ()
#end
#implementation BuildingsViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
[self performSelector:#selector(retrieveBuildings)];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - TableView Setup
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.buildingsArray count];
if (tableView == self.searchDisplayController.searchResultsTableView) {
return [self.searchResults count];
} else {
return [self.buildingsArray count];
}
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"buildingsCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
PFObject *tempObject = [self.buildingsArray objectAtIndex:indexPath.row];
cell.textLabel.text = [tempObject objectForKey:#"buildingTitle"];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
if (tableView == self.searchDisplayController.searchResultsTableView) {
cell.textLabel.text = [self.searchResults objectAtIndex:indexPath.row];
} else {
cell.textLabel.text = [tempObject objectForKey:#"buildingTitle"];
}
return cell;
}
#pragma mark - Helper Methods
-(void)retrieveBuildings
{
PFQuery *retrieveBuildings = [PFQuery queryWithClassName:#"buildingsList"];
[retrieveBuildings findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
self.buildingsArray = [[NSArray alloc] initWithArray:objects];
}
[self.tableView reloadData];
}];
}
- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
NSPredicate *resultPredicate = [NSPredicate
predicateWithFormat:#"SELF contains[cd] %#",
searchText];
self.searchResults = [self.buildingsArray filteredArrayUsingPredicate:resultPredicate];
}
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString
scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
objectAtIndex:[self.searchDisplayController.searchBar
selectedScopeButtonIndex]]];
return YES;
}
#end

Answer 1

I think you are on the right track...
My understanding is that you are receiving an array of dictionaries, and passing that received array to your declared buildingsArray. This is not the issue. The issue in my understanding is that you are then attempting to retrieve one of the values from one of those dictionaries without the appropriate code.
Your are attempting this process in two locations.
I refer to the code within your cellForRowAtIndexPath method.
As an aside, it is no longer necessary to check for cell == nil, so you can remove the if statement that wraps your cell setter (cell = [[UITableViewCell...).
UPDATE...
The crash in your code when you remove this check for nil is due to the fact that you do not register a reuse identifier for the searchResultsTableView.
To correct your search and data parsing, I recommend that you follow the sample code I have included following.
Add a new property tempMutableArray, and remove the static declaration from cellForRowAtIndexPath and place it between the #import and #interface lines as shown following...
#import <Parse/Parse.h>
static NSString *CellIdentifier = #"buildingsCell"; // relocated static declaration
#interface BuildingsViewController ()
#property (nonatomic, strong) NSMutableArray *tempMutableArray;
#end
// implementation
Then in your viewDidLoad TVC lifecycle method, instantiate the NSMutableArray, and register the UITableViewCell class and CellIdentifier reuse identifier with searchResultsTableView...
- (void)viewDidLoad {
[super viewDidLoad];
//...your other code...
[self setTempMutableArray:[[NSMutableArray alloc] init]];
[self.searchDisplayController.searchResultsTableView registerClass:[UITableViewCell class]
forCellReuseIdentifier:CellIdentifier];
}
...
YOUR NEW REPLACEMENT cellForRowAtIndexPath: METHOD
To properly parse your information from Parse, try the following...
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = nil;
if (tableView == self.searchDisplayController.searchResultsTableView) {
cell = [self.searchDisplayController.searchResultsTableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell.textLabel.text = [self.searchResults objectAtIndex:indexPath.row];
} else {
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
NSDictionary *tempDict = nil;
NSString *tempString = nil;
tempDict = [self.buildingsArray objectAtIndex:indexPath.row];
tempString = [tempDict objectForKey:#"buildingTitle"];
[cell.textLabel setText:tempString];
}
return cell;
}
You will also need to complete similar in your filterContentForSearchText: method.
YOUR NEW REPLACEMENT filterContentForSearchText: METHOD
- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
NSPredicate *resultPredicate = nil;
[self.tempMutableArray removeAllObjects];
for (NSDictionary *tempDict in self.buildingsArray) {
NSString *tempString = nil;
tempString = [tempDict objectForKey:#"buildingTitle"];
[self.tempMutableArray addObject:tempString];
}
resultPredicate = [NSPredicate predicateWithFormat:#"SELF contains[cd] %#", searchText];
self.searchResults = [self.tempMutableArray filteredArrayUsingPredicate:resultPredicate];
}
...CONTINUE WITH PREVIOUS RESPONSE
My understanding... what is happening in your code is that your PFQuery returns an NSArray in its completion block. You set your property buildingsArray, also an NSArray, based on this. Your no longer need, as far as I understand, to treat the returned data as a PFObject.
Let me know how you go.

Answer 2

You are trying to apply the NSPredicate on an array of PFObjects so your predicate needs to look like this:
NSPredicate *resultPredicate = [NSPredicate
predicateWithFormat:#"variableNameToSearchOn contains[cd] %#",
searchText];
EDIT:
You can try this:
NSPredicate *resultPredicate = [NSPredicate
predicateWithFormat:#"buildingTitle contains[c] %#",
searchText];

Answer 3

#pragma mark UISearchBarDelegate
-(void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar{
sar.showsCancelButton=YES;
sar.autocorrectionType = UITextAutocorrectionTypeNo;
}
- (BOOL)searchBar:(UISearchBar *)searchBar shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
NSString* newText = [searchBar.text stringByReplacingCharactersInRange:range withString:text];
searchStr = newText;
[self DisplayMatchSearch];
[tblView reloadData];
return YES;
}
-(BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar{
//write code for requset data from database search.....
sar.showsCancelButton=NO;
[sar resignFirstResponder];
return YES;
}
-(void)searchBarCancelButtonClicked:(UISearchBar *)searchBar{
[self getAlldata];
#try {
[tblBeepUsers reloadData];
}
#catch (NSException * e) {
}
[sar resignFirstResponder];
sar.text=#"";
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
searchStr = sar.text;
[sar resignFirstResponder];
[self DisplayMatchSearch];
[tblView reloadData];
}
-(void)DisplayMatchSearch{
if (searchStr && searchStr.length) {
//temp array
arrLocation = [[NSMutableArray alloc] init];
//parsed array self.buildingsArray
for (NSDictionary *dictionary in self.buildingsArray)
{
if ([[dictionary objectForKey:#"name"] rangeOfString:searchStr options:NSCaseInsensitiveSearch].location != NSNotFound) {
[arrLocation addObject:dictionary];
}
}
[tblview reloadData];
}
}