Question

尝试使用Parse.com在我的应用上实现UISearchController进行查询。网上有一些例子，但对于年龄较大的UISearchDisplayController＆＃39;现已弃用。

无论如何，就搜索和查询（根据我的NSLog）而言，我似乎一切都正常工作，但是桌面视图根本没有更新，我不知道为什么。

以下是我所做的：

@interface LocalSalesViewController () <UISearchResultsUpdating, UISearchControllerDelegate>


@property (nonatomic, strong) UISearchController *searchController;
@property (nonatomic, strong) NSMutableArray *searchResults; // Filtered search results

@end

@implementation LocalSalesViewController
- (id)initWithCoder:(NSCoder *)aCoder {
    self = [super initWithCoder:aCoder];
    if (self) {
        self.parseClassName = @"Sales";
        self.pullToRefreshEnabled = YES;
        self.paginationEnabled = YES;
        self.objectsPerPage = 25;
    }
    return self;
}


- (void)viewDidLoad {
    [super viewDidLoad];

    self.searchResults = [NSMutableArray array];
    self.searchController = [[UISearchController alloc] initWithSearchResultsController:nil];
    self.searchController.searchResultsUpdater = self;
    self.searchController.delegate = self;
    self.searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y, self.searchController.searchBar.frame.size.width, 44.0);
    self.tableView.tableHeaderView = self.searchController.searchBar;
    self.definesPresentationContext = YES;

}


-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{
    static NSString *CellIdentifier = @"Cell";

    LocalSalesTableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
    if (cell == nil)
    {
       cell = [[LocalSalesTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

    }

        object = (tableView == self.tableView) ? self.objects[indexPath.row] : self.searchResults[indexPath.row];

        cell.saleTitle.text = [object objectForKey:@"name"];

    return cell;


}



- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if (tableView == self.tableView) {


        return self.objects.count;

    } else {

        return self.searchResults.count;

    }
}


#pragma mark - UISearchResultsUpdating
-(void)updateSearchResultsForSearchController:(UISearchController *)searchController {
    NSString *searchString = [self.searchController.searchBar text];
    [self updateFilteredContentForSaleName:searchString];
     [((UITableViewController *)self.searchController.searchResultsController).tableView reloadData];
}
#pragma mark - Content Filtering
- (void)updateFilteredContentForSaleName:(NSString *)saleName {
    [self.searchResults removeAllObjects];

    for (PFObject *sale in self.objects)
    {
        NSString *saleTitle = [sale objectForKey:@"name"];
        if ([[saleTitle lowercaseString] hasPrefix:[saleName lowercaseString]])
        {
            [self.searchResults addObject:sale];
        }
    }
    NSLog(@"%@", self.searchResults);

}

似乎self.searchResults日志正在通过过滤掉那些并添加到数组中来完成它应该做的一切，但是根本不会更新任何单元格。

Answer 1

AFAIK，调用initWithSearchResultsController:nil表示self将成为用于显示结果的视图控制器。

所以((UITableViewController *)self.searchController.searchResultsController).tableView是self.tableView

所以if (tableView == self.tableView)始终为true。

UISearchController不使用PFQueryTableView进行更新

1 个答案: