Search of UITableView - ios

Question

I have a UITableView populated from a JSON data feed using an NSDictionary and NSArray and I am trying to search the UITableView data using this code, but it is not working some other related info based on how I set it up is in this question Data from JSON Parsing straight to UITableView
- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
// Update the filtered array based on the search text and scope.
// Remove all objects from the filtered search array
[self.filteredCandyArray removeAllObjects];
// Filter the array using NSPredicate
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"SELF.name contains[c] %#",searchText];
NSArray *tempArray = [airportsArray filteredArrayUsingPredicate:predicate];
NSLog(#" text %#", searchText);
filteredCandyArray = [NSMutableArray arrayWithArray:tempArray];
NSLog(#"NSLog %#", scope);
}
This is how the data is parsed
NSString* path = #"https://api.flightstats.com/flex/airports/rest/v1/json/active?appId=532ca6af&appKey=50d6d3351e5953152b2688f10d10d276";
NSMutableURLRequest* _request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:path]];
[_request setHTTPMethod:#"GET"];
NSURLResponse *response = nil;
NSError *error = nil;
NSData* _connectionData = [NSURLConnection sendSynchronousRequest:_request returningResponse:&response error:&error];
if(nil != error)
{
NSLog(#"Error: %#", error);
}
else
{
NSMutableDictionary* json = nil;
if(nil != _connectionData)
{
json = [NSJSONSerialization JSONObjectWithData:_connectionData options:NSJSONReadingMutableContainers error:&error];
}
if (error || !json)
{
NSLog(#"Could not parse loaded json with error:%#", error);
}
else
{
routeRes = [json objectForKey:#"airports"];
airportsArray = [json objectForKey:#"airports"];
}
_connectionData = nil;
NSLog(#"connection done");
}
NSLog(#" end array %#", candyArray);
// Initialize the filteredCandyArray with a capacity equal to the candyArray's capacity
filteredCandyArray = [NSMutableArray arrayWithCapacity:[airportsArray count]];
// Reload the table
[NSSortDescriptor sortDescriptorWithKey:#"name" ascending:YES];
[[self tableView] reloadData];

Answer 1

You can manually build the array via the build in loop methods,
NSMutableArray *filteredResults = [NSMutableArray new];
[airportsArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
if ([obj.name rangeOfString: searchText].location != NSNotFound) {
[filteredResults addObject:obj];
}
}];
self.filteredCandyArray = [NSArray arrayWithArray:filteredResults];
You will need to replace the id obj with what ever object model you are using. For example if you had a plane model you might do Plane *plane in replace of id obj.
I might add how to use it via predicates later, but this should do what you request. You may view the enumerateObjectsUsingBlock: and arrayWithArray: methods in the NSArray documentation. rangeOfString: can be viewed in the NSString documentation.
-NSArray Documentation
-NSString Documentation