UISearchDisplayController shows Header Section of parent UITableViewController

问题

I am facing strange issue with UITableViewController. I display search result in UISearchDisplayController. If I have some data in search result then it is fine, but when I have empty result it will show section of UITableView which resides behind this SearchDC. I have same delegate and source for both Search and normal table view. Refere images attached with post(one is at beginning and one at end).I have colde like below:

    - (NSString*)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    NSString *pstrHeader = [[NSString alloc] init];
    if(self.isSearchActivated)
    {
        NSInteger count =  [self.parrSearchDataSourceKeys count];
        if(count > 0)
            pstrHeader = [pstrHeader stringByAppendingString:[self.parrSearchDataSourceKeys objectAtIndex:section]];
        else
        {
            pstrHeader = nil;
           [[[UIAlertView alloc]initWithTitle:@"header of section" message:@"Count is zero" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil] show];

        }

    }
    else
    {
        NSInteger count = [self.parrDataSourceKeys count];
        if(count > 0)
            pstrHeader = [pstrHeader stringByAppendingString:[self.parrDataSourceKeys objectAtIndex:section]];
        else
            pstrHeader = nil;

    }
    return pstrHeader;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
//#warning Potentially incomplete method implementation.
    // Return the number of sections.
    NSInteger count = 0;
    if(self.isSearchActivated)
    {
        count =  [self.parrSearchDataSourceKeys count];
        if(count <= 0)
        {
            [[[UIAlertView alloc]initWithTitle:@"number of section" message:@"Count is zero" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil] show];
        }
    }
    else
        count = [self.parrDataSourceKeys count];
    return count;

}

I have same class for delegate and source but internally it will handle different maps and arrays for normal table view and search result table view.

Also I display search result like below:

-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{

    NSString *selectedTitle = [searchBar.scopeButtonTitles objectAtIndex: searchBar.selectedScopeButtonIndex];
    selectedTitle = [self convertStringToEnglish:selectedTitle];
    self.isSearchActivated = YES;

    FolderInfo* searchFolder = [[FolderInfo alloc] init];
    if(self.pmdSearchDataSource != nil)
    {
        [self.pmdSearchDataSource removeAllObjects];
    }
    if(self.parrSearchDataSourceKeys != nil)
    {
        [self.parrSearchDataSourceKeys removeAllObjects];
    }
    NSString* pstrSearchText = [searchBar text];
    NSString* pstrSearchIn = @"Folder";
    if([self.pstrWorkspaceId isEqualToString:@"-1"])
    {
        pstrSearchIn = @"Application";

    }
    else if([self.pstrFolderId isEqualToString:@"-1"])
    {
        pstrSearchIn = @"Project";
    }

    self.pmdSearchDataSource = [[NSMutableDictionary alloc] initWithDictionary:[searchFolder GetSearchListForSubElementFor:pstrSearchText InWorkspaceId:self.pstrWorkspaceId
                                                                                                                InFolderId:self.pstrFolderId forSearchField:selectedTitle In:pstrSearchIn] copyItems:NO ];
    NSArray *keys = [[self.pmdSearchDataSource allKeys] sortedArrayUsingSelector:@selector(compare:)];
    self.parrSearchDataSourceKeys = [[NSMutableArray alloc] initWithArray:keys];

    self.pSearchDC.searchResultsTableView.delegate = self;
    self.pSearchDC.searchResultsTableView.dataSource = self;
    [self.view bringSubviewToFront:self.pSearchDC.searchResultsTableView];
    [self.pSearchDC.searchResultsTableView reloadData];
}

If intially normal table view have two sections visible on screen and then i move to searchResultDC it will first show blank table but after search clicked when I have no result and reload searchResultDC tableview it will show section of normal table view which is behnind this searchResultDC

I have refered post: Reloading UITableView behind UISearchDisplayController

But note that I need section in search result also and solution in above post is for case where we dont have section in search result.

Let me know if you need more information.

来源：https://stackoverflow.com/questions/14994997/uisearchdisplaycontroller-shows-header-section-of-parent-uitableviewcontroller