Problems Implementing Search Bar with Parse

Question

I tried to implement a search bar with Parse from a project I found on Google but I have a problem.

The two lines where it says //my problem is causing the app to crash

if (self.canSearch == 0) {
//my problem   query = [PFQuery queryWithClassName:self.parseClassName];
} else {
//my problem   query = [PFQuery queryWithClassName:self.parseClassName];
}

in the

-(PFQuery *)queryForTable {

    PFQuery *query;
    if (self.canSearch == 0) {
        query = [PFQuery queryWithClassName:self.parseClassName];
    } else {
        query = [PFQuery queryWithClassName:self.parseClassName];
    }

    NSString *searchThis = [_searchedBar.text lowercaseString];

    [query whereKey:@"item1" containsString:searchThis];

    }

    [query orderByAscending:@"item1"];

    // If Pull To Refresh is enabled, query against the network by default.
    if (self.pullToRefreshEnabled) {
        query.cachePolicy = 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) {
        query.cachePolicy = kPFCachePolicyCacheThenNetwork;
    }

    return query;
}

I'm not sure what's wrong because it works in the project I am working for.

This is what it says in the console when the app crashes

libc++abi.dylib: terminating with uncaught exception of type NSException 

Answer 1

Those lines you've identified are almost certainly not the problem. Kind of a magic trick here: NSLog(@"%@", _searchedBar); will probably reveal that _searchedBar is undefined, therefore .text , therefore the parameter to whereKey which causes the crash.

Also note that:

if (anything) {
    something
} else {
    something
}

Can be stated more concisely as:

something